Numerical and Experimental Investigation of the Flow-Induced Noise of a Wall Mounted Airfoil

Size: px
Start display at page:

Download "Numerical and Experimental Investigation of the Flow-Induced Noise of a Wall Mounted Airfoil"

Transcription

1 Numerical and Experimental Investigation of the Flow-Induced Noise of a Wall Mounted Airfoil Paul Croaker, Danielle Moreau, Manuj Awasthi, Mahmoud Karimi, Con Doolan, Nicole Kessissoglou School of Mechanical and Manufacturing Engineering UNSW Australia

2 Motivation for current work Previous work on wall mounted airfoil flow-induced noise Experimental measurements Hybrid RANS-BEM technique Current experimental and numerical investigation Experimental and numerical flow data Numerical prediction of flow-induced noise Conclusions Overview

3 Physically interesting case study Trailing edge noise Tip vortex noise Wall Mounted Airfoil Study Turbulence leading edge interaction noise Moreau et al demonstrated that the tip vortex noise scales with M 7.5 Low to moderate Reynolds numbers and low Mach number flows Expect scaling to be closer to M 6 (surface dipoles) or M 5 (sharp edge) Noise generating mechanism clearly complex and interesting

4 Wall Mounted Airfoil Study Croaker et al derived a hybrid RANS-BEM technique to predict flow-induced noise produced by bodies in flow Successfully predicted the sound generated by the wall mounted airfoil Lack of experimental flow data made it difficult to fully validate the model Devised an experimental and numerical study into the flow around and noise generated by a finite wall mounted airfoil Gain a deeper understanding into the tip noise mechanism Generate validation data for the RANS-BEM technique

5 RANS-BEM Motivation Reynolds Averaged Navier Stokes Computational aeroacoustic methods based on LES are time demanding LES techniques have a significant data storage and processing burden RANS based approaches are computationally efficient LES RANS

6 Hybrid RANS-BEM Motivation Boundary Element Method Scattering from simple geometries using analytical Green s function Extended by multiple scattering concept to include finite aerofoils BEM required to consider complex geometries or thick section aerofoil or hydrofoils S831 Profile

7 Hybrid RANS-BEM Challenges Reynolds Averaged Navier Stokes Only provides a statistical representation of turbulence Lacks knowledge of phase relationship between flow noise sources Boundary Element Method Requires the incident field on the body due to the flow noise sources Predicts the acoustic field scattered by the body Phase relationship between flow noise sources vital in accurate calculation of scattered field

8 Hybrid RANS-BEM Challenges Reynolds Averaged Navier Stokes Only provides a statistical representation of turbulence Lacks knowledge of phase relationship between flow noise sources Boundary Element Method Requires the incident field on the body due to the flow noise sources Predicts the acoustic field scattered by the body Phase relationship between flow noise sources vital in accurate calculation of scattered field

9 Phase Relationship from RANS RANS-based Statistical Noise Sources Accounts for phase relationship between flow noise sources through two point space-time correlations The space-time correlations are derived from the RANS-based turbulence statistics

10 RANS-BEM Solution Procedure

11 RANS-BEM Solution Procedure, Source, b Far-field point,

12 RANS-BEM Solution Procedure, Source, c Far-field point,

13 RANS-BEM Solution Procedure,,,, Φ,,,,

14 RANS-BEM Solution Procedure l s, ω s, u s

15 RANS-BEM Solution Procedure Velocity cross-spectra approximated from RANS turbulence statistics Requires extensive validation and empirical constant tuning Experimental and high-fidelity numerical flow and noise data required to achieve this Scattered sound field calculated for each flow noise source separately Total far-field acoustic power spectral density obtained by combining individual source contributions based on velocity cross-spectra

16 Finite Wall Mounted Foil Moreau, DJ, Doolan, CJ, Alexander, WN, Meyers, TW and Devenport, WJ 2016, Wall-mounted finite airfoil-noise production and prediction, AIAA Journal, vol. 54, 5, pp

17 Flow Structures

18 Flow Structures - Tip

19 Characteristic Scales - Tip z/s = 0.95 z/s = 0.975

20 Characteristic Scales - Tip z/s = z/s = 1.0

21 Characteristic Scales - Tip z/s = z/s = 1.025

22 Far-Field Acoustic Power Spectral Density Moreau, DJ, Doolan, CJ, Alexander, WN, Meyers, TW and Devenport, WJ 2016, Wall-mounted finite airfoil-noise production and prediction, AIAA Journal, vol. 54, 5, pp

23 Source Contribution Regions

24 Trailing and Leading Edge PSD Trailing edge Leading edge

25 Junction and Tip PSD Junction Tip

26 Conclusions of RANS-BEM work Hybrid RANS-BEM technique to predict flow-induced noise from wall mounted airfoil Velocity cross-spectra approximated from RANS turbulence statistics BEM used to calculate the scattered sound field Good comparison of results with experiment

27 Conclusions of RANS-BEM work Lack of available hydrodynamic validation data Need an extensive experimental and high-fidelity numerical dataset to Validate RANS-BEM technique Inform RANS-BEM model parameters

28 Current Numerical and Experimental Investigations Finite wall-mounted airfoil studied NACA0012 section airfoil Chord of 0.2m Span of 0.2m Trailing edge thickness of 3mm Flow velocity of 20 m/s Reynolds number of 274,000 Mach number of 0.06

29 Experimental Investigation at UNSW Perform flow and noise calculations on finite wall-mounted airfoils in the UNSW Anechoic Wind Tunnel

30 Experimental Investigation at UNSW

31 Experimental Investigation at UNSW Single hot wire measurements taken in the near wake of the airfoil at various spanwise locations Mean flow and turbulence statistics Spectral content of fluctuating velocities

32 Experimental Investigation at UNSW Acoustic measurements are currently not possible due to excessive background noise levels New fan and motor are being installed Outlet ductwork modifications including muffler are being installed Facility will be ready for acoustic measurements from June 2017

33 High-fidelity Numerical Simulations

34 High-fidelity Numerical Simulations Structured mesh with approximately 11 million cells y + ~ 1 Spanwise and streamwise resolution less refined Numerical discretisation schemes Second order backward differencing in time Second order central differencing in space, with 10% blending of second order upwind differencing Pressure and velocity coupling achieved using the PISO algorithm

35 Tip Vortex Flow Structures Trailing Edge Turbulence Laminar Flow over Leading Edge Horseshoe Vortex Rollup Transition to Turbulence

36 Mean flow statistics at 50% span

37 Velocity Autospectral Density at 50% span y = 0 mm y = 2 mm

38 Mean flow statistics at 75% span

39 Velocity Autospectral Density at 75% span y = 0 mm y = 2 mm

40 Mean flow statistics at 97.5% span

41 Velocity Autospectral Density at 97.5% span y = 0 mm y = 2 mm

42 High-fidelity flow noise prediction Flow-induced noise sources extracted from LES data based on Lighthill s acoustic analogy Pressure wave propagation from flow noise sources to the airfoil predicted Uses a near-field propagation algorithm which regularises the singular integrals Boundary element model used to predict the scattered and total acoustic fields Acoustic pressure predicted 1m perpendicular to airfoil surface at a height equal to the span

43 Boundary element model

44 Far-field pressure

45 Low frequency noise caused by laminar to turbulence transition Far-field pressure Blunt trailing edge vortex shedding

46 Conclusions Experimental and numerical investigation of flow around a wall mounted airfoil Experimental results exhibit a slight asymmetry which suggests airfoil is not aligned perfectly with 0 degrees Numerical results show reasonable results directly behind the airfoil, however a more rapid drop-off is observed transversely through the wake High-fidelity prediction of the flow induced noise Remains to be validated with experimental measurements Grid refinement study underway to improve grid resolution in streamwise and spanwise directions

PUBLISHED VERSION. Published version: https://www.acoustics.asn.au/conference_proceedings/aasnz2016/abstracts/themespapers.htm#p39

PUBLISHED VERSION. Published version: https://www.acoustics.asn.au/conference_proceedings/aasnz2016/abstracts/themespapers.htm#p39 PUBLISHED VERSION Jesse Coombs, Con Doolan, Anthony Zander, Danielle Moreau and Laura Brooks Statistical estimation of trailing edge noise from finite wall-mounted airfoils Proceedings of the Acoustics2016

More information

Self-noise prediction of a sharp-edged strut using a quasi-periodic CFD-BEM technique

Self-noise prediction of a sharp-edged strut using a quasi-periodic CFD-BEM technique Self-noise prediction of a sharp-edged strut using a quasi-periodic CFD-BEM technique Mahmoud Karimi 1 ; Paul Croaker 1 ; Nicole Kessissoglou 1 ; Con Doolan 2 ; Steffen Marburg 3 1 School of Mechanical

More information

On the aeroacoustic tonal noise generation mechanism of a sharp-edged. plate

On the aeroacoustic tonal noise generation mechanism of a sharp-edged. plate On the aeroacoustic tonal noise generation mechanism of a sharp-edged plate Danielle J. Moreau, Laura A. Brooks and Con J. Doolan School of Mechanical Engineering, The University of Adelaide, South Australia,

More information

Empirical study of the tonal noise radiated by a sharpedged flat plate at low-to-moderate Reynolds number

Empirical study of the tonal noise radiated by a sharpedged flat plate at low-to-moderate Reynolds number Paper Number 44, Proceedings of ACOUSTICS 2011 Empirical study of the tonal noise radiated by a sharpedged flat plate at low-to-moderate Reynolds number Danielle J. Moreau, Laura A. Brooks and Con J. Doolan

More information

Acoustic analysis of flat plate trailing edge noise

Acoustic analysis of flat plate trailing edge noise Proceedings of 20th International Congress on Acoustics, ICA 2010 23 27 August 2010, Sydney, Australia PACS: 43.28.Ra ABSTRACT Acoustic analysis of flat plate trailing edge noise D.J. Moreau, M.R. Tetlow,

More information

Prediction of noise from a wing-in-junction flow using computational fluid dynamics

Prediction of noise from a wing-in-junction flow using computational fluid dynamics Proceedings of Acoustics - Fremantle -3 November, Fremantle, Australia Prediction of noise from a wing-in-junction flow using computational fluid dynamics Con J. Doolan, Jesse L. Coombs, Danielle J. Moreau,

More information

Numerical study of the effects of trailing-edge bluntness on highly turbulent hydro-foil flows

Numerical study of the effects of trailing-edge bluntness on highly turbulent hydro-foil flows Numerical study of the effects of trailing-edge bluntness on highly turbulent hydro-foil flows T. Do L. Chen J. Tu B. Anderson 7 November 2005 Abstract Flow-induced noise from fully submerged lifting bodies

More information

Trailing edge noise prediction for rotating serrated blades

Trailing edge noise prediction for rotating serrated blades Trailing edge noise prediction for rotating serrated blades Samuel Sinayoko 1 Mahdi Azarpeyvand 2 Benshuai Lyu 3 1 University of Southampton, UK 2 University of Bristol, UK 3 University of Cambridge, UK

More information

On the noise reduction mechanism of a flat plate serrated trailing edge at low-to-moderate Reynolds number

On the noise reduction mechanism of a flat plate serrated trailing edge at low-to-moderate Reynolds number On the noise reduction mechanism of a flat plate serrated trailing edge at low-to-moderate Reynolds number Danielle J. Moreau, Laura A. Brooks and Con J. Doolan The University of Adelaide, South Australia,

More information

Proceedings of Meetings on Acoustics

Proceedings of Meetings on Acoustics Proceedings of Meetings on Acoustics Volume 19, 2013 http://acousticalsociety.org/ ICA 2013 Montreal Montreal, Canada 2-7 June 2013 Noise Session 3aNSb: Aviaton, Aviation Engines, and Flow Noise 3aNSb3.

More information

DIRECT SIMULATION OF TRAILING-EDGE NOISE GENERATED BY A CONTROLLED DIFFUSION AIRFOIL USING A LATTICE-BOLTZMANN METHOD

DIRECT SIMULATION OF TRAILING-EDGE NOISE GENERATED BY A CONTROLLED DIFFUSION AIRFOIL USING A LATTICE-BOLTZMANN METHOD DIRECT SIMULATION OF TRAILING-EDGE NOISE GENERATED BY A CONTROLLED DIFFUSION AIRFOIL USING A LATTICE-BOLTZMANN METHOD M. Sanjosé, S. Moreau Department of Mechanical Engineering Université de Sherbrooke

More information

Computation of trailing-edge aeroacoustics with vortex shedding

Computation of trailing-edge aeroacoustics with vortex shedding Center for Turbulence Research Annual Research Briefs 5 379 Computation of trailing-edge aeroacoustics with vortex shedding By M. Wang. Motivation and objectives The prediction and control of noise generated

More information

Numerical Simulation of a Blunt Airfoil Wake

Numerical Simulation of a Blunt Airfoil Wake 6th Australasian Fluid Mechanics Conference Crown Plaza, Gold Coast, Australia 2-7 December 7 Numerical Simulation of a Blunt Airfoil Wake C.J. Doolan School of Mechanical Engineering University of Adelaide,

More information

Numerical study of low Reynolds number airfoil flows

Numerical study of low Reynolds number airfoil flows Proceedings of the Acoustics 212 Nantes Conference 23-27 April 212, Nantes, France Numerical study of low Reynolds number airfoil flows O. Marsden and T. Charrel Laboratoire de Mecanique des Fluides et

More information

A Simple Approach to Estimate Flow-Induced Noise from Steady State CFD Data

A Simple Approach to Estimate Flow-Induced Noise from Steady State CFD Data Paper Number 54, Proceedings of ACOUSTICS 2011 2 4 November 2011, Gold Coast, Australia A Simple Approach to Estimate Flow-Induced Noise from Steady State CFD Data Paul Croaker (1), Alex Skvortsov (2)

More information

Fan Blade Trailing-Edge Noise Prediction Using RANS Simulations

Fan Blade Trailing-Edge Noise Prediction Using RANS Simulations Acoustics 8 Paris Fan Blade Trailing-Edge Noise Prediction Using RANS Simulations Y. Rozenberg a, M. Roger b and S. Moreau c a ONERA, BP 72-29 avenue de la Division Leclerc, 92322 Chatillon Cedex, France

More information

Noise modelling of wing-in-junction flows

Noise modelling of wing-in-junction flows Proceedings of Acoustics 013 Victor Harbor 17-0 November 013, Victor Harbor, Australia Noise modelling of wing-in-junction flows J.L. Coombs (1), C.J. Doolan (1), D.J. Moreau (1), A.C. Zander (1) and L.A.

More information

AEROACOUSTIC INVESTIGATION OF THE EFFECT OF A DETACHED FLAT PLATE ON THE NOISE FROM A SQUARE CYLINDER

AEROACOUSTIC INVESTIGATION OF THE EFFECT OF A DETACHED FLAT PLATE ON THE NOISE FROM A SQUARE CYLINDER Abstract AEROACOUSTIC INVESTIGATION OF THE EFFECT OF A DETACHED FLAT PLATE ON THE NOISE FROM A SQUARE CYLINDER Aniket D. Jagtap 1, Ric Porteous 1, Akhilesh Mimani 1 and Con Doolan 2 1 School of Mechanical

More information

Far Field Noise Minimization Using an Adjoint Approach

Far Field Noise Minimization Using an Adjoint Approach Far Field Noise Minimization Using an Adjoint Approach Markus P. Rumpfkeil and David W. Zingg University of Toronto Institute for Aerospace Studies 4925 Dufferin Street, Toronto, Ontario, M3H 5T6, Canada

More information

Trailing Edge Noise Computation of a Fan Blade Profile

Trailing Edge Noise Computation of a Fan Blade Profile 1ème Congrès Français d Acoustique Lyon, 12-16 Avril 21 Trailing Edge Noise Computation of a Fan Blade Profile Julien Christophe 1,Stéphane Moreau 2,Jérome Anthoine 2 1 von Karman Institute for Fluid Dynamics,

More information

DIRECT NUMERICAL SIMULATIONS OF HIGH SPEED FLOW OVER CAVITY. Abstract

DIRECT NUMERICAL SIMULATIONS OF HIGH SPEED FLOW OVER CAVITY. Abstract 3 rd AFOSR International Conference on DNS/LES (TAICDL), August 5-9 th, 2001, Arlington, Texas. DIRECT NUMERICAL SIMULATIONS OF HIGH SPEED FLOW OVER CAVITY A. HAMED, D. BASU, A. MOHAMED AND K. DAS Department

More information

Uncertainty quantification of low-speed fan noise

Uncertainty quantification of low-speed fan noise Center for Turbulence Research Proceedings of the Summer Program 2012 251 Uncertainty quantification of low-speed fan noise By J. Christophe, M. Sanjose, S. Moreau, J.A.S. Witteveen AND G. Iaccarino Uncertainty

More information

Z. Zuo, Q. Huang and S. Liu

Z. Zuo, Q. Huang and S. Liu Journal of Applied Fluid Mechanics, Vol. 1, No., pp. 37-339, 019. Available online at www.jafmonline.net, ISSN 1735-357, EISSN 1735-3645. DOI: 10.18869/acadpub.jafm.75.54.914 An Analysis on the Flow Field

More information

LES of the trailing-edge flow and noise of a NACA0012 airfoil near stall

LES of the trailing-edge flow and noise of a NACA0012 airfoil near stall Center for Turbulence Research Proceedings of the Summer Program 8 7 LES of the trailing-edge flow and noise of a NACA airfoil near stall By S. Moreau, J. Christophe AND M. Roger Reynolds-averaged Navier-Stokes

More information

APPLICATIONS OF FULLY-RESOLVED LARGE EDDY SIMULATION TO UNSTEADY FLUID FLOW AND AEROACOUSTICS PREDICTIONS

APPLICATIONS OF FULLY-RESOLVED LARGE EDDY SIMULATION TO UNSTEADY FLUID FLOW AND AEROACOUSTICS PREDICTIONS APPLICATIONS OF FULLY-RESOLVED LARGE EDDY SIMULATION TO UNSTEADY FLUID FLOW AND AEROACOUSTICS PREDICTIONS Chisachi Kato Institute of Industrial Science The University of Tokyo 4-6-1 Komaba, Meguro-ku,

More information

AERODYNAMIC NOISE SIMULATION OF PROPELLER FAN BY LARGE EDDY SIMULATION

AERODYNAMIC NOISE SIMULATION OF PROPELLER FAN BY LARGE EDDY SIMULATION 日本機械学会環境工学部門 NEE(Numerical Environmental Engineering) 研究会 P.1 AERODYNAMIC NOISE SIMULATION OF PROPELLER FAN BY LARGE EDDY SIMULATION Shingo Hamada ADVANCED TECHNOLOGY R&D CENTER MITSUBISHI ELECTRIC Corp.

More information

Flow simulation and aerodynamic noise prediction for a high-speed train wheelset

Flow simulation and aerodynamic noise prediction for a high-speed train wheelset aeroacoustics volume 13 number 7 & 8 214 pages 533 552 533 Flow simulation and aerodynamic noise prediction for a high-speed train wheelset J. Y. Zhu 1, Z. W. Hu 1 and D. J. Thompson 2 1 Aerodynamics and

More information

Effect of Airfoil Aerodynamic Loading on Trailing-Edge Noise Sources

Effect of Airfoil Aerodynamic Loading on Trailing-Edge Noise Sources AIAA JOURNAL Vol. 43, No. 1, January 2005 Effect of Airfoil Aerodynamic Loading on Trailing-Edge Noise Sources Stéphane Moreau Valeo Motors and Actuators, 78321 La Verrière, France and Michel Roger Ecole

More information

aeroacoustics volume 8 number

aeroacoustics volume 8 number LES prediction of wall-pressure fluctuations and noise of a low-speed airfoil by Meng Wang, Stephane Moreau, Gianluca Iaccarino and Michel Roger reprinted from aeroacoustics volume 8 number 3 9 published

More information

Fan Stage Broadband Noise Benchmarking Programme

Fan Stage Broadband Noise Benchmarking Programme Fan Stage Broadband Noise Benchmarking Programme Specification of Fundamental Test Case 3 (FC3) Version 1 : 26 January 2015 Test Case Coordinator John Coupland ISVR University of Southampton UK E-mail

More information

INVESTIGATION OF AIRFOIL TRAILING EDGE NOISE WITH ADVANCED EXPERIMENTAL AND NUMERICAL METHODS

INVESTIGATION OF AIRFOIL TRAILING EDGE NOISE WITH ADVANCED EXPERIMENTAL AND NUMERICAL METHODS The 21 st International Congress on Sound and Vibration 13-17 July, 214, Beijing/China INVESTIGATION OF AIRFOIL TRAILING EDGE NOISE WITH ADVANCED EXPERIMENTAL AND NUMERICAL METHODS Tom Gerhard and Thomas

More information

Validation of unstructured-mesh LES of the trailing-edge flow and noise of a Controlled-Diffusion airfoil

Validation of unstructured-mesh LES of the trailing-edge flow and noise of a Controlled-Diffusion airfoil Center for Turbulence Research Proceedings of the Summer Program 006 1 Validation of unstructured-mesh LES of the trailing-edge flow and noise of a Controlled-Diffusion airfoil By S. Moreau, D. Neal, Y.

More information

Large-eddy simulations for wind turbine blade: rotational augmentation and dynamic stall

Large-eddy simulations for wind turbine blade: rotational augmentation and dynamic stall Large-eddy simulations for wind turbine blade: rotational augmentation and dynamic stall Y. Kim, I.P. Castro, and Z.T. Xie Introduction Wind turbines operate in the atmospheric boundary layer and their

More information

Self noise produced by an airfoil with non-flat plate trailing edge serrations

Self noise produced by an airfoil with non-flat plate trailing edge serrations Self noise produced by an airfoil with non-flat plate trailing edge serrations Tze Pei. Chong 1 and Alexandros Vathylakis 2 School of Engineering and Design, Brunel University, Uxbridge, UB8 3PH, United

More information

Future trends of applications of CFD to industrial design

Future trends of applications of CFD to industrial design Future trends of applications of CFD to industrial design 4 Fully-resolved LES (Large Eddy Simulation) Resolve such eddies that are responsible for production of turbulence in TBL λ x+ =300, λ y+ = 30,

More information

INFLUENCE OF ACOUSTIC EXCITATION ON AIRFOIL PERFORMANCE AT LOW REYNOLDS NUMBERS

INFLUENCE OF ACOUSTIC EXCITATION ON AIRFOIL PERFORMANCE AT LOW REYNOLDS NUMBERS ICAS 2002 CONGRESS INFLUENCE OF ACOUSTIC EXCITATION ON AIRFOIL PERFORMANCE AT LOW REYNOLDS NUMBERS S. Yarusevych*, J.G. Kawall** and P. Sullivan* *Department of Mechanical and Industrial Engineering, University

More information

Numerical Approach for Noise Reduction of Wind Turbine Blade Tip with Earth Simulator

Numerical Approach for Noise Reduction of Wind Turbine Blade Tip with Earth Simulator Journal of the Earth Simulator, Volume 2, March 2005, 11 33 Numerical Approach for Noise Reduction of Wind Turbine Blade Tip with Earth Simulator Chuichi Arakawa* 1, Oliver Fleig 1, Makoto Iida 1 and Masakazu

More information

Simulation of inflow turbulence noise

Simulation of inflow turbulence noise Simulation of inflow turbulence noise Thomas P. Lloyd a,b, Mathieu Gruber c, Stephen R. Turnock a and Victor F. Humphrey b a Fluid-Structure Interactions Research Group; b Institute of Sound and Vibration

More information

Aeroacoustic calculations of a full scale Nordtank 500kW wind turbine

Aeroacoustic calculations of a full scale Nordtank 500kW wind turbine Journal of Physics: Conference Series PAPER OPEN ACCESS Aeroacoustic calculations of a full scale Nordtank 500kW wind turbine To cite this article: H Debertshäuser et al 2016 J. Phys.: Conf. Ser. 753 022032

More information

Measurement and Scaling of Trailing-Edge Noise * *rather an extensive look at the scaling of the related source quantities Michaela Herr

Measurement and Scaling of Trailing-Edge Noise * *rather an extensive look at the scaling of the related source quantities Michaela Herr Measurement and Scaling of Trailing-Edge Noise * *rather an extensive look at the scaling of the related source quantities Michaela Herr Institute of Aerodynamics and Flow Technology DLR Braunschweig 13

More information

AIRFRAME NOISE MODELING APPROPRIATE FOR MULTIDISCIPLINARY DESIGN AND OPTIMIZATION

AIRFRAME NOISE MODELING APPROPRIATE FOR MULTIDISCIPLINARY DESIGN AND OPTIMIZATION AIRFRAME NOISE MODELING APPROPRIATE FOR MULTIDISCIPLINARY DESIGN AND OPTIMIZATION AIAA-2004-0689 Serhat Hosder, Joseph A. Schetz, Bernard Grossman and William H. Mason Virginia Tech Work sponsored by NASA

More information

An experimental study of airfoil instability tonal noise with trailing edge serrations

An experimental study of airfoil instability tonal noise with trailing edge serrations An experimental study of airfoil instability tonal noise with trailing edge serrations Tze Pei Chong a, *, Phillip Joseph b a School of Engineering and Design, Brunel University, Uxbridge, UB8 3PH,UK b

More information

Aeroacoustic Computation of Ducted-Fan Broadband Noise Using LES Data

Aeroacoustic Computation of Ducted-Fan Broadband Noise Using LES Data Aeroacoustic Computation of Ducted-Fan Broadband Noise Using LES Data G. Reboul, C. Polacsek, S. Lewy and S. Heib ONERA, 29 avenue Division Leclerc, 92320 Châtillon, France gabriel.reboul@onera.fr 77 Following

More information

Acoustic Noise Prediction and Reduction Reasearch of Helicopter Ducted Tail Rotor

Acoustic Noise Prediction and Reduction Reasearch of Helicopter Ducted Tail Rotor International Conference on Computer Engineering, Information cience & Application Technology (ICCIA 016) Acoustic Noise Prediction and Reduction Reasearch of Helicopter Ducted Tail Rotor Chaopu Zhang

More information

Simulation of Aeroelastic System with Aerodynamic Nonlinearity

Simulation of Aeroelastic System with Aerodynamic Nonlinearity Simulation of Aeroelastic System with Aerodynamic Nonlinearity Muhamad Khairil Hafizi Mohd Zorkipli School of Aerospace Engineering, Universiti Sains Malaysia, Penang, MALAYSIA Norizham Abdul Razak School

More information

Global Structure of Buffeting Flow on Transonic Airfoils

Global Structure of Buffeting Flow on Transonic Airfoils Global Structure of Buffeting Flow on Transonic Airfoils J.D. Crouch, A. Garbaruk, D. Magidov, and L. Jacquin Abstract The flow field associated with transonic airfoil buffet is investigated using a combination

More information

Direct Numerical Simulation of Aeolian Tones

Direct Numerical Simulation of Aeolian Tones THE 5 TH ASIAN COMPUTAITIONAL FLUID DYNAMICS BUSAN, KOREA, OCTOBER 27-30, 2003 Direct Numerical Simulation of Aeolian Tones Osamu Inoue 1 1. Institute of Fluid Science, Tohoku University,2-1-1 Katahira,

More information

Large-Eddy Simulation and Trailing-Edge Noise Prediction of an Airfoil with Boundary-Layer Tripping

Large-Eddy Simulation and Trailing-Edge Noise Prediction of an Airfoil with Boundary-Layer Tripping 15th AIAA/CEAS Aeroacoustics Conference (3th AIAA Aeroacoustics Conference) 11-13 May 9, Miami, Florida AIAA 9-3197 Large-Eddy Simulation and Trailing-Edge Noise Prediction of an Airfoil with Boundary-Layer

More information

Turboengine noise prediction: present and future. S. Moreau Département de Génie Mécanique Université de Sherbrooke, QC, Canada

Turboengine noise prediction: present and future. S. Moreau Département de Génie Mécanique Université de Sherbrooke, QC, Canada Turboengine noise prediction: present and future S. Moreau Département de Génie Mécanique Université de Sherbrooke, QC, Canada Background Ventilation systems (cockpit, cargo) Fan alone or rotor-stator

More information

STAR-CCM+: NACA0012 Flow and Aero-Acoustics Analysis James Ruiz Application Engineer January 26, 2011

STAR-CCM+: NACA0012 Flow and Aero-Acoustics Analysis James Ruiz Application Engineer January 26, 2011 www.cd-adapco.com STAR-CCM+: NACA0012 Flow and Aero-Acoustics Analysis James Ruiz Application Engineer January 26, 2011 Introduction The objective of this work is to prove the capability of STAR-CCM+ as

More information

Keywords: Contoured side-walls, design, experimental, laminar boundary layer, numerical, receptivity, stability, swept wing, wind tunnel.

Keywords: Contoured side-walls, design, experimental, laminar boundary layer, numerical, receptivity, stability, swept wing, wind tunnel. Applied Mechanics and Materials Vol. 390 (2013) pp 96-102 Online available since 2013/Aug/30 at www.scientific.net (2013) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/amm.390.96

More information

Computational Fluid Dynamics Analysis of Jets with Internal Forced Mixers

Computational Fluid Dynamics Analysis of Jets with Internal Forced Mixers Computational Fluid Dynamics Analysis of Jets with Internal Forced Mixers L. A. Garrison A. S. Lyrintzis G. A. Blaisdell Purdue University, West Lafayette, IN, 47907, USA W. N. Dalton Rolls-Royce Corporation,

More information

The Pennsylvania State University The Graduate School College of Engineering DEVELOPMENT OF A TRAILING-EDGE NOISE PREDICTION

The Pennsylvania State University The Graduate School College of Engineering DEVELOPMENT OF A TRAILING-EDGE NOISE PREDICTION The Pennsylvania State University The Graduate School College of Engineering DEVELOPMENT OF A TRAILING-EDGE NOISE PREDICTION METHOD USING THE NON-LINEAR DISTURBANCE EQUATIONS A Thesis in Aerospace Engineering

More information

Trailing edge noise of partially porous airfoils

Trailing edge noise of partially porous airfoils AIAA Aviation 16-2 June 214, Atlanta, GA 2th AIAA/CEAS Aeroacoustics Conference AIAA 214-339 Trailing edge noise of partially porous airfoils Thomas Geyer and Ennes Sarradj Brandenburg University of Technology

More information

Simulation of Flow around a Surface-mounted Square-section Cylinder of Aspect Ratio Four

Simulation of Flow around a Surface-mounted Square-section Cylinder of Aspect Ratio Four Simulation of Flow around a Surface-mounted Square-section Cylinder of Aspect Ratio Four You Qin Wang 1, Peter L. Jackson 2 and Jueyi Sui 2 1 High Performance Computing Laboratory, College of Science and

More information

arxiv: v1 [physics.flu-dyn] 25 Dec 2018

arxiv: v1 [physics.flu-dyn] 25 Dec 2018 Self-Noise modelling and acoustic scaling of an axial fan configured with rotating controlled diffusion blade Behdad Davoudi 1 and Scott C. Morris 2 arxiv:1812.10003v1 [physics.flu-dyn] 25 Dec 2018 Abstract

More information

Stefano Rolfo, Charles Moulinec and David R. Emerson. Scientific Computing Department, STFC Daresbury Laboratory, Warrington

Stefano Rolfo, Charles Moulinec and David R. Emerson. Scientific Computing Department, STFC Daresbury Laboratory, Warrington Implementation of a highly scalable aeroacoustic module based on the Ffowcs-Williams and Hawkings analogy within the open-source CFD software Code_Saturne Stefano Rolfo, Charles Moulinec and David R. Emerson

More information

RECONSTRUCTION OF TURBULENT FLUCTUATIONS FOR HYBRID RANS/LES SIMULATIONS USING A SYNTHETIC-EDDY METHOD

RECONSTRUCTION OF TURBULENT FLUCTUATIONS FOR HYBRID RANS/LES SIMULATIONS USING A SYNTHETIC-EDDY METHOD RECONSTRUCTION OF TURBULENT FLUCTUATIONS FOR HYBRID RANS/LES SIMULATIONS USING A SYNTHETIC-EDDY METHOD N. Jarrin 1, A. Revell 1, R. Prosser 1 and D. Laurence 1,2 1 School of MACE, the University of Manchester,

More information

Multipole Moment Preserving Condensation of Volumetric Acoustic Sources

Multipole Moment Preserving Condensation of Volumetric Acoustic Sources Paper Number 53, Proceedings of ACOUSTICS 2011 Multipole Moment Preserving Condensation of Volumetric Acoustic Sources P. Croaker 1, S. Marburg 2, R. Kinns 1, N. Kessissoglou 1 1 School of Mechanical &

More information

University of Bristol - Explore Bristol Research. Peer reviewed version. Link to publication record in Explore Bristol Research PDF-document

University of Bristol - Explore Bristol Research. Peer reviewed version. Link to publication record in Explore Bristol Research PDF-document Szke, M., & Azarpeyvand, M. (216). Trailing edge noise measurement: assumptions and uncertainties. Paper presented at 23rd International Congress on Sound and Vibration, Athens, Greece. Peer reviewed version

More information

Improvements of a parametric model for fan broadband and tonal noise

Improvements of a parametric model for fan broadband and tonal noise Improvements of a parametric model for fan broadband and tonal noise A. Moreau and L. Enghardt DLR - German Aerospace Center, Mueller-Breslau-Str. 8, 10623 Berlin, Germany antoine.moreau@dlr.de 4083 Engine

More information

A Multi-Dimensional Limiter for Hybrid Grid

A Multi-Dimensional Limiter for Hybrid Grid APCOM & ISCM 11-14 th December, 2013, Singapore A Multi-Dimensional Limiter for Hybrid Grid * H. W. Zheng ¹ 1 State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy

More information

A Detached-Eddy-Simulation study

A Detached-Eddy-Simulation study A Detached-Eddy-Simulation study Proper-Orthogonal-Decomposition of the wake flow behind a model wind turbine J. Göing 1, J. Bartl 2, F. Mühle 3, L. Sætran 2, P.U. Thamsen 1 Technical University of Berlin

More information

Wind Turbine Noise Modelling Based on Amiet s Theory

Wind Turbine Noise Modelling Based on Amiet s Theory Wind Turbine Noise Modelling Based on Amiet s Theory Yuan Tian, Benjamin Cotté, Antoine Chaigne To cite this version: Yuan Tian, Benjamin Cotté, Antoine Chaigne. Wind Turbine Noise Modelling Based on Amiet

More information

Aerodynamic Investigation of a 2D Wing and Flows in Ground Effect

Aerodynamic Investigation of a 2D Wing and Flows in Ground Effect 26 2 2009 3 CHINESE JOURNAL OF COMPUTATIONAL PHYSICS Vol. 26,No. 2 Mar., 2009 Article ID : 10012246 X(2009) 0220231210 Aerodynamic Investigation of a 2D Wing and Flows in Ground Effect YANG Wei, YANG Zhigang

More information

Aeroacoustic Study of an Axial Ring Fan Using Lattice- Boltzmann Simulations

Aeroacoustic Study of an Axial Ring Fan Using Lattice- Boltzmann Simulations Aeroacoustic Study of an Axial Ring Fan Using Lattice- Boltzmann Simulations Dominic Lallier-Daniels, Department of Mechanical Enginering, Université de Sherbrooke, Sherbrooke, Quebec, Canada Mélanie Piellard,

More information

An Aeroacoustic Analysis of Wind Turbines THESIS. Krishna Guha Velliyur Ramachandran. Graduate Program in Mechanical Engineering

An Aeroacoustic Analysis of Wind Turbines THESIS. Krishna Guha Velliyur Ramachandran. Graduate Program in Mechanical Engineering An Aeroacoustic Analysis of Wind Turbines THESIS Presented in Partial Fulfillment of the Requirements for the Degree Master of Science in the Graduate School of The Ohio State University By Krishna Guha

More information

OpenFOAM Simulations for MAV Applications

OpenFOAM Simulations for MAV Applications 16 th Annual CFD Symposium 11th-12th August 2014, Bangalore 1 OpenFOAM Simulations for MAV Applications Syed Zahid*, A. Rajesh, M.B. Subrahmanya, B.N. Rajani *Student, Dept. of Mech. Engg, SDM, Dharwad,

More information

FEDSM AERODYNAMIC NOISE SIMULATION OF PROPELLER FAN BY LARGE EDDY SIMULATION

FEDSM AERODYNAMIC NOISE SIMULATION OF PROPELLER FAN BY LARGE EDDY SIMULATION Proceedings of FEDSM27 5th Joint ASME/JSME Fluids Engineering Conference July 3-August 2, 27 San Diego, California USA FEDSM27-37145 AERODYNAMIC NOISE SIMULATION OF PROPELLER FAN BY LARGE EDDY SIMULATION

More information

Numerical Investigation of the Transonic Base Flow of A Generic Rocket Configuration

Numerical Investigation of the Transonic Base Flow of A Generic Rocket Configuration 1 Numerical Investigation of the Transonic Base Flow of A Generic Rocket Configuration A. Henze, C. Glatzer, M. Meinke, W. Schröder Institute of Aerodynamics, RWTH Aachen University, Germany March 21,

More information

Study on Acoustic and Flow Induced Noise Characteristics of T Shaped Pipe with Square Cross Section

Study on Acoustic and Flow Induced Noise Characteristics of T Shaped Pipe with Square Cross Section www.seipub.org/aiaas/ Advances in Applied Acoustics (AIAAS), Volume 5 2016 doi: 10.14355/aiaas.2016.05.002 Study on Acoustic and Flow Induced Noise Characteristics of T Shaped Pipe with Square Cross Section

More information

A Numerical Study of Circulation Control on a Flapless UAV

A Numerical Study of Circulation Control on a Flapless UAV Ninth International Conference on Computational Fluid Dynamics (ICCFD9), Istanbul, Turkey, July 11-15, 2016 ICCFD9-xxxx A Numerical Study of Circulation Control on a Flapless UAV Huaixun Ren 1, Weimin

More information

Numerical Investigation of Wind Tunnel Wall Effects on a Supersonic Finned Missile

Numerical Investigation of Wind Tunnel Wall Effects on a Supersonic Finned Missile 16 th International Conference on AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 16 May 26-28, 2015, E-Mail: asat@mtc.edu.eg Military Technical College, Kobry Elkobbah, Cairo, Egypt Tel : +(202) 24025292

More information

Aerodynamic Noise Simulation Technology for Developing Low Noise Products

Aerodynamic Noise Simulation Technology for Developing Low Noise Products Aerodynamic Noise Simulation Technology for Developing Noise Products KANEKO, Kimihisa MATSUMOTO, Satoshi YAMAMOTO, Tsutomu ABSTRACT The size reduction trend of electric power equipment causes increased

More information

Investigation of the unsteady flow and noise sources generation in a slat cove: hybrid zonal RANS/LES simulation and dedicated experiment

Investigation of the unsteady flow and noise sources generation in a slat cove: hybrid zonal RANS/LES simulation and dedicated experiment 20th AIAA Computational Fluid Dynamics Conference 27-30 June 2011, Honolulu, Hawaii AIAA 2011-3203 Investigation of the unsteady flow and noise sources generation in a slat cove: hybrid zonal RANS/LES

More information

Workshop Category 1: Trailing-Edge Noise

Workshop Category 1: Trailing-Edge Noise Second Workshop on Benchmark Problems for Airframe Noise Computations (BANC-II) 7-8 June 1, Colorado Springs, Colorado, USA Workshop Category 1: Trailing-Edge Noise M. Herr*, C. Bahr and M. Kamruzzaman

More information

Research on Dynamic Stall and Aerodynamic Characteristics of Wind Turbine 3D Rotational Blade

Research on Dynamic Stall and Aerodynamic Characteristics of Wind Turbine 3D Rotational Blade Research on Dynamic Stall and Aerodynamic Characteristics of Wind Turbine 3D Rotational Blade HU Guo-yu, SUN Wen-lei, Dong Ping The School of Mechanical Engineering Xinjiang University Urumqi, Xinjiang,

More information

REVIEW OF NOISE PREDICTION METHODS FOR AXIAL FLOW FANS. Thomas Carolus, Marc Schneider

REVIEW OF NOISE PREDICTION METHODS FOR AXIAL FLOW FANS. Thomas Carolus, Marc Schneider Prepared as Paper IN000/391 for INTER.NOISE 000, Nice, France, Aug. 000 REVIEW OF NOISE PREDICTION METHODS FOR AXIAL FLOW FANS Thomas Carolus, Marc Schneider ABSTRACT This paper will review some methods

More information

AN UNCERTAINTY ESTIMATION EXAMPLE FOR BACKWARD FACING STEP CFD SIMULATION. Abstract

AN UNCERTAINTY ESTIMATION EXAMPLE FOR BACKWARD FACING STEP CFD SIMULATION. Abstract nd Workshop on CFD Uncertainty Analysis - Lisbon, 19th and 0th October 006 AN UNCERTAINTY ESTIMATION EXAMPLE FOR BACKWARD FACING STEP CFD SIMULATION Alfredo Iranzo 1, Jesús Valle, Ignacio Trejo 3, Jerónimo

More information

Porous Airfoils: Noise Reduction and Boundary Layer

Porous Airfoils: Noise Reduction and Boundary Layer 15th AIAA/CEAS Aeroacoustics Conference (3th AIAA Aeroacoustics Conference) 11-13 May 29, Miami, Florida AIAA 29-3392 Porous Airfoils: Noise Reduction and Boundary Layer Effects Thomas Geyer Ennes Sarradj

More information

Simulation and improvement of the ventilation of a welding workshop using a Finite volume scheme code

Simulation and improvement of the ventilation of a welding workshop using a Finite volume scheme code 1 st. Annual (National) Conference on Industrial Ventilation-IVC2010 Feb 24-25, 2010, Sharif University of Technology, Tehran, Iran IVC2010 Simulation and improvement of the ventilation of a welding workshop

More information

886. Aeroacoustic noise reduction design of a landing gear structure based on wind tunnel experiment and simulation

886. Aeroacoustic noise reduction design of a landing gear structure based on wind tunnel experiment and simulation 886. Aeroacoustic noise reduction design of a landing gear structure based on wind tunnel experiment and simulation Xue Caijun 1, Zheng Guang 2, Tang Wei 3, Long Shuangli 4 Key Laboratory of Fundamental

More information

Improved numerical simulation of bridge deck aeroelasticity by model validation

Improved numerical simulation of bridge deck aeroelasticity by model validation Improved numerical simulation of bridge deck aeroelasticity by model validation A.Šarkić, R. Höffer Building Aerodynamics Laboratory, Bochum, Germany anina.sarkic@rub.de Abstract In this study, the results

More information

IN SEARCH OF THE PHYSICS: NASA s APPROACH TO AIRFRAME NOISE

IN SEARCH OF THE PHYSICS: NASA s APPROACH TO AIRFRAME NOISE IN SEARCH OF THE PHYSICS: NASA s APPROACH TO AIRFRAME NOISE Michele G. Macaraeg, David P. Lockard, and Craig L. Streett Aerodynamics, Aerothermodynamics, and Acoustics Competency NASA Langley Research

More information

Aeroacoustic simulation of automotive ventilation outlets

Aeroacoustic simulation of automotive ventilation outlets Aeroacoustic simulation of automotive ventilation outlets J.-L. Adam a, D. Ricot a, F. Dubief a and C. Guy b a Renault SAS, 1 avenue du golf, 78288 Guyancourt, France b Ligeron, Les Algorithmes Bâtiment

More information

MUSAF II colloquium September 2013 Simulation of Airframe Noise using a two-step DES/FWH approach

MUSAF II colloquium September 2013 Simulation of Airframe Noise using a two-step DES/FWH approach MUSAF II colloquium 18-20 September 2013 Simulation of Airframe Noise using a two-step DES/FWH approach Frank Institute of Fluid Mechanics and Engineering Acoustics Technical University of Berlin (TUB),

More information

Given a stream function for a cylinder in a uniform flow with circulation: a) Sketch the flow pattern in terms of streamlines.

Given a stream function for a cylinder in a uniform flow with circulation: a) Sketch the flow pattern in terms of streamlines. Question Given a stream function for a cylinder in a uniform flow with circulation: R Γ r ψ = U r sinθ + ln r π R a) Sketch the flow pattern in terms of streamlines. b) Derive an expression for the angular

More information

Yiran Su 1, Seungnam Kim 1, Weikang Du 1, Spyros A. Kinnas 2, Mikael Grekula 3, Jan Hallander 3, Da- Qing Li 3

Yiran Su 1, Seungnam Kim 1, Weikang Du 1, Spyros A. Kinnas 2, Mikael Grekula 3, Jan Hallander 3, Da- Qing Li 3 Fifth International Symposium on Marine Propulsion SMP 17, Espoo, Finland, June 2017 Prediction of the Propeller-induced Hull Pressure Fluctuation via a Potential-based Method: Study of the Rudder Effect

More information

Improved near-wall accuracy for solutions of the Helmholtz equation using the boundary element method

Improved near-wall accuracy for solutions of the Helmholtz equation using the boundary element method Center for Turbulence Research Annual Research Briefs 2006 313 Improved near-wall accuracy for solutions of the Helmholtz equation using the boundary element method By Y. Khalighi AND D. J. Bodony 1. Motivation

More information

LARGE EDDY SIMULATION OF FLOW OVER NOZZLE GUIDE VANE OF A TRANSONIC HIGH PRESSURE TURBINE

LARGE EDDY SIMULATION OF FLOW OVER NOZZLE GUIDE VANE OF A TRANSONIC HIGH PRESSURE TURBINE 20 th Annual CFD Symposium, August 09-10, 2018, Bangalore LARGE EDDY SIMULATION OF FLOW OVER NOZZLE GUIDE VANE OF A TRANSONIC HIGH PRESSURE TURBINE Bharathan R D, Manigandan P, Vishal Tandon, Sharad Kapil,

More information

Elliptic Trailing Edge for a High Subsonic Turbine Cascade

Elliptic Trailing Edge for a High Subsonic Turbine Cascade Elliptic Trailing Edge for a High Subsonic Turbine Cascade Mahmoud M. El-Gendi 1, Mohammed K. Ibrahim 2, Koichi Mori 3, and Yoshiaki Nakamura 4 1 Graduate School of Engineering, Nagoya University, Nagoya

More information

FUNDAMENTAL INVESTIGATIONS OF AIRFRAME NOISE 1. M.G. Macaraeg 2 NASA Langley Research Center Hampton, VA, USA

FUNDAMENTAL INVESTIGATIONS OF AIRFRAME NOISE 1. M.G. Macaraeg 2 NASA Langley Research Center Hampton, VA, USA FUNDAMENTAL INVESTIGATIONS OF AIRFRAME NOISE 1 M.G. Macaraeg 2 NASA Langley Research Center Hampton, VA, USA Abstract An extensive numerical and experimental study of airframe noise mechanisms associated

More information

On the correlation of the acoustic signal of microphones mounted on a flat plate to the turbulence of an impinging jet

On the correlation of the acoustic signal of microphones mounted on a flat plate to the turbulence of an impinging jet On the correlation of the acoustic signal of microphones mounted on a flat plate to the turbulence of an impinging jet C. Reichl a, M. Boeck a, W. Tilser a, H. Lang a, K. Haindl b, F. Reining b and M.

More information

DETACHED-EDDY SIMULATION OF FLOW PAST A BACKWARD-FACING STEP WITH A HARMONIC ACTUATION

DETACHED-EDDY SIMULATION OF FLOW PAST A BACKWARD-FACING STEP WITH A HARMONIC ACTUATION DETACHED-EDDY SIMULATION OF FLOW PAST A BACKWARD-FACING STEP WITH A HARMONIC ACTUATION Liang Wang*, Ruyun Hu*, Liying Li*, Song Fu* *School of Aerospace Engineering, Tsinghua University, Beijing 100084,

More information

Large Eddy Simulation of Three-Stream Jets

Large Eddy Simulation of Three-Stream Jets Large Eddy Simulation of Three-Stream Jets J. Xiong 1, F. Liu 2, and D. Papamoschou 3 University of California, Irvine, Irvine, CA, 92697 We present a computational study of three-stream jets simulating

More information

Numerical study of battle damaged two-dimensional wings

Numerical study of battle damaged two-dimensional wings Advances in Fluid Mechanics IX 141 Numerical study of battle damaged two-dimensional wings S. Djellal, T. Azzam, M. Djellab & K. Lakkaichi Fluid Mechanics Laboratory Polytechnical School Bordj El Bahri,

More information

Numerical Simulation of Rocket Engine Internal Flows

Numerical Simulation of Rocket Engine Internal Flows Numerical Simulation of Rocket Engine Internal Flows Project Representative Masao Furukawa Authors Taro Shimizu Nobuhiro Yamanishi Chisachi Kato Nobuhide Kasagi Institute of Space Technology and Aeronautics,

More information

Effects of Free-Stream Vorticity on the Blasius Boundary Layer

Effects of Free-Stream Vorticity on the Blasius Boundary Layer 17 th Australasian Fluid Mechanics Conference Auckland, New Zealand 5-9 December 2010 Effects of Free-Stream Vorticity on the Boundary Layer D.A. Pook, J.H. Watmuff School of Aerospace, Mechanical & Manufacturing

More information

Hybrid CFD/FEM calculations for the aeroacoustic noise radiated from a radial fan

Hybrid CFD/FEM calculations for the aeroacoustic noise radiated from a radial fan Hybrid CFD/FEM calculations for the aeroacoustic noise radiated from a radial fan Hakan Dogan Department of Mathematics, Physics and Chemistry, Beuth University of Applied Sciences, Berlin, Chris Eisenmenger

More information

Prediction of noise from serrated trailing-edges arxiv: v1 [physics.flu-dyn] 10 Aug 2015

Prediction of noise from serrated trailing-edges arxiv: v1 [physics.flu-dyn] 10 Aug 2015 Under consideration for publication in J. Fluid Mech. Prediction of noise from serrated trailing-edges arxiv:58.2276v [physics.flu-dyn] Aug 25 B. Lyu, M. Azarpeyvand 2 and S. Sinayoko 3 Department of Engineering,

More information