Free Field Technologies
|
|
- Irma Harper
- 5 years ago
- Views:
Transcription
1 Free Field Technologies SFA Conference Toulouse the 25 th of November 2010 Copyright Free Field Technologies
2 Free Field Technologies Free Field Technologies is a technical leader in the field of acoustic, vibro-acoustic and aero-acoustic CAE The company has three main activities: Development of the ACTRAN software suite Provision of related services: training, consulting, technology transfer, methodology development, installation and performance tuning, custom developments, CAE process automation Research in acoustic CAE and related fields Headquarters - Mont-Saint-Guibert near Brussels, Local offices - Toulouse, Tokyo, and Troy. ACTRAN is used by over 250 industrial customers worldwide. 2 Copyright Free Field Technologies
3 FFT s Engineering Services FFT Engineering Services are offered from FFT s headquarters in Belgium FFT s French office in Toulouse FFT s local office in Tokyo Human Resources: 15 highly skilled staff with thorough acoustics and structural dynamics background Deep experience in numerical acoustics, vibro-acoustics and aeroacoustics consultancy projects for the automotive and aerospace industry such as intake and exhaust noise, NVH of trimmed body, engine noise radiation, HVAC noise, Side Mirror Noise, windows transparency, Also skilled in using other CAE software and high-performance computing resources 3 Copyright Free Field Technologies
4 The ACTRAN software suite ACTRAN for NASTRAN ACTRAN DGM ACTRAN Vibro-Acoustics ACTRAN Aero-Acoustics ACTRAN TM ACTRAN Acoustics ACTRAN VI 4 Copyright Free Field Technologies
5 ACTRAN Acoustics General purpose acoustic modelling tool Target applications Sound propagation in ducts Sound diffraction by rigid obstacles Sound radiation by vibrating structures High-performance solvers and parallel processing Exhaust Muffler HVAC Module Gearbox Radiation 5 Copyright Free Field Technologies
6 PowerTrain Radiation 1. PWT Skin Mesh with Panels 2. Finite element mesh 4. Post-process in ACTRAN 3. ACTRAN model building COMPUTATION Mechanical results for excitation 6 Copyright Free Field Technologies
7 ACTRAN VibroAcoustics General purpose vibro-acoustic modelling tool Large finite element and material library: acoustic finite and infinite elements incl. pyras and pentas visco-elastic elements for beams, shells and solids Composite elements allowing also the handling pre-stress effects (new) Porous and poro-elastic finite elements Piezo-electric elements for modelling active structures (new) Realistic excitation mechanisms: acoustical, kinematical and dynamical excitations turbulent boundary layer diffuse sound field Loudspeaker Side window transmission Muffler Radiation 7 Copyright Free Field Technologies
8 VibroAcoustics Target Applications Complex Intake & exhaust system Transparency computation Trim analysis component or global level Random vibro-acoustics Side window or windshield submitted to a random aerodynamic excitation. Satellite and/or its embarked components (antennas, solar array panels ), rocket nozzle, rocket fairing during launch process TBL noise on the aircraft fuselage transmitted to the cabin Radiating structures with strong couplings Ship building... See applications in dedicated presentations 8 Copyright Free Field Technologies
9 ACTRAN AeroAcoustics Broadband aero-acoustics modelling tool (vortex noise) Key features Direct link to most CFD codes Validated by experiments for fans, side window noise and simplified Air Conditioning systems References: Daimler, BMW, VW, Delphi, Visteon, John Deere, Brothers, PSA... Fan noise Air conditioning duct Correlation to test 9 Copyright Free Field Technologies
10 Automotive HVAC Experimental Set-Up ACTRAN Results 906 mm 415 mm CFD Results - Fluent A better agreement could be reached : A longer CFD input would provide a better frequency resolution, A finer CFD mesh would increase the accuracy of the levels (current = 600k FV) 10 Copyright Free Field Technologies
11 Turbulent Wall Pressure Fluctuations (TWPF) Unsteady CFD Computation icfd excitation generation Integration / Projection DFT time domain pressure field frequency domain distributed load ACTRAN vibro-acoustic model ACTRAN/VI post-processing 11 Copyright Free Field Technologies
12 ACTRAN TM Exclusive tool for the modelling of noise radiation by aircraft engine and other turbomachines Key features: excitation defined in terms of duct modes propagation in a non-uniform background flow accurate modelling of liners References: Airbus, Rolls-Royce, SNECMA, General Electric, MTU, Honeywell, Liebherr, Turbomeca, Aermacchi,... Aermacchi Airbus Airbus 12 Copyright Free Field Technologies
13 Case Study: APU Intake ACTRAN Model Infinite elements Results Admittance BC Modal basis Mean flow computed by Fluent 13 Copyright Free Field Technologies
14 ACTRAN/DGM Objective: solve exhaust turbine noise Key features Linearized Euler Equations (LEE) DGM scheme in the time domain Non-structured mesh Import the RANS-based mean flow from most standard CFD codes Each best element chooses its best order (1 to 16) Complex Exhaust Flow Acoustic field TURNEX Project 14 Copyright Free Field Technologies
15 3D Effects Bifurcations and pylon AIAA_2009 : Exhaust noise prediction of realistic 3D lined turbofans submitted to strong shear layers, R. Leneveu, B. Schiltz, Y. Druon, A. Mosson, Airbus France, FFT The devices modify the propagation in the far field Must be taken into account Such a model is very large (200 m³ of fluid) and a DGM approach is required Geometry of realistic 3D exhaust with its devices Shear layers Mean velocity at flight sideline condition 5 db Effect of the bifurcations - Far field directivity - Mode (13,1) 1 st BPF 15 Copyright Free Field Technologies Unstructured 3D mesh
ACTRAN Modules. Products overview. Copyright Free Field Technologies
ACTRAN Modules Products overview Copyright Free Field Technologies ACTRAN ACTRAN is the most complete CAE tool for Acoustic, Aero-acoustic and Vibro-acoustic modelling. ACTRAN is based on the finite and
More informationIndustries & Applications
Industries & Applications Aerospace High Lift Devices Landing Gear ECS Jet and turbo noise Marine Propeller noise Cavitation Hull/propeller/rudder interaction Automotive Wing mirror Sunroof noise HVAC
More informationFLINOVIA 2017, State Collage, USA. Dr. Alexander Peiffer, Dr. Uwe Müller 27 th -28 th April 2017
Review of efficient methods for the computation of transmission loss of plates with inhomogeneous material properties and curvature under turbulent boundary layer excitation FLINOVIA 2017, State Collage,
More informationImprovements 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 informationAircraft Cabin Acoustic Modeling
Penn State 2012 Center for Acoustics and Vibration Workshop Aircraft Cabin Acoustic Modeling 2012 Penn State Center for Acoustics and Vibration Workshop Adam Weston Senior Structural-Acoustics Specialist
More informationAeroacoustic 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 informationNUMERICAL SIMULATION OF ACOUSTIC LINERS IN NACELLE TURBOFANS TOWARDS AIRCRAFT NOISE REDUCTION
Proceedings of 11 th European Conference on Turbomachinery Fluid dynamics & Thermodynamics ETC11, March 23-27, 2015, Madrid, Spain NUMERICAL SIMULATION OF ACOUSTIC LINERS IN NACELLE TURBOFANS TOWARDS AIRCRAFT
More informationPerformance improvement of propulsion systems by optimization of the mixing efficiency and pressure loss of forced mixers
Paper presented at the 8. European Propulsion Forum Affordability and the Environment Key Challenges for Propulsion in the 2 st Century 26.-28. March 200 in Nottingham Abstract Performance improvement
More informationVibro-acoustic Analysis for Noise Reduction of Electric Machines
Vibro-acoustic Analysis for Noise Reduction of Electric Machines From Flux to OptiStruct Example : Synchronous Machine Flux 2D coupling to OptiStruct Patrick LOMBARD Application Team Manager Patrick.Lombard@cedrat.com
More informationAcoustic Scattering through a Circular Orifice in Low Mach-Number Flow
Acoustic Scattering through a Circular Orifice in Low Mach-Number Flow Stefan Sack, Mats Åbom KTH, KTH, the Royal Institute of Technology Research Areas Aero-acoustics Vibration isolators Wave-based methods
More informationAero-Acoustic assessment of installed propellers
Aero-Acoustic assessment of installed propellers Marius Gabriel COJOCARU*,1, Mihai Leonida NICULESCU 1, Mihai Victor PRICOP 1 *Corresponding author *,1 INCAS National Institute for Aerospace Research Elie
More informationLaboratory synthesis of turbulent boundary layer wall-pressures and the induced vibro-acoustic response
Proceedings of the Acoustics 22 Nantes Conference 23-27 April 22, Nantes, France Laboratory synthesis of turbulent boundary layer wall-pressures and the induced vibro-acoustic response C. Maury a and T.
More informationinter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE
Copyright SFA - InterNoise 2000 1 inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE I-INCE Classification: 1.0 ACOUSTIC ENVIRONMENT
More informationPRACTICE NO. PD-ED-1259 PREFERRED May 1996 RELIABILITY PAGE 1 OF 6 PRACTICES ACOUSTIC NOISE REQUIREMENT
PREFERRED May 1996 RELIABILITY PAGE 1 OF 6 PRACTICES Practice: Impose an acoustic noise requirement on spacecraft hardware design to ensure the structural integrity of the vehicle and its components in
More informationThe so-called parabolic equation (PE) has proved its capability to deal with the long
Aeroacoustics P. Malbéqui (Onera) E-mail : patrice.malbequi@onera.fr DOI : 1.17/1.AL7-9 Capabilities of the High-Order Parabolic Equation to Predict Sound Propagation in Boundary and Shear Layers The so-called
More informationVIBRATION ANALYSIS OF AN AUTOMOTIVE SILENCER
VIBRATION ANALYSIS OF AN AUTOMOTIVE SILENCER K. R. Gadre PG Student, Department Mechanical Engg., Sinhgad College of Engineering, Pune T. A. Jadhav Associate Professor, Department Mechanical Engg, Sinhgad
More informationTurboengine 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 informationUniversity of Southampton Research Repository eprints Soton
University of Southampton Research Repository eprints Soton Copyright and Moral Rights for this thesis are retained by the author and/or other copyright owners. A copy can be downloaded for personal non-commercial
More informationNumerical Study of Pressure Waves Generated by H-IIA Launch Vehicle at Lift-off
Numerical Study of Pressure Waves Generated by H-IIA Launch Vehicle at Lift-off Seiji Tsutsumi, Taro Shimizu, Ryoji Takaki, Eiji Shima, and Kozo Fujii Japan Aerospace Exploration Agency 3-1-1 Yoshinodai,
More informationW-8 Inlet In-duct Array Evaluation
https://ntrs.nasa.gov/search.jsp?r=2184548 218-9-16T15:19:18+:Z National Aeronautics and Space Administration W-8 Inlet In-duct Array Evaluation Rick Bozak NASA Glenn Research Center Acoustics Technical
More informationFundamentals of noise and Vibration analysis for engineers
Fundamentals of noise and Vibration analysis for engineers M.P.NORTON Department of Mechanical Engineering, University of Western Australia CAMBRIDGE UNIVERSITY PRESS Preface xii Acknowledgements xv Introductory
More informationInvestigation of the Effect of Inflow Distortion on the Noise Emitted from an Axial Flow Fan Experiencing Cross Flow
Investigation of the Effect of Inflow Distortion on the Noise Emitted from an Axial Flow Fan Experiencing Cross Flow J. Tirakala, H.-J. Kaltenbach Lehrstuhl für Aerodynamik und Strömungsmechanik Overview
More informationPenn State Center for Acoustics and Vibration (CAV)
Penn State Center for Acoustics and Vibration () Structural Vibration and Acoustics Group Presented as part of the 2013 Spring workshop Stephen Hambric, Group Leader Marty Trethewey Stephen Conlon Andrew
More informationFEDSM COMPUTATIONAL AEROACOUSTIC ANALYSIS OF OVEREXPANDED SUPERSONIC JET IMPINGEMENT ON A FLAT PLATE WITH/WITHOUT HOLE
Proceedings of FEDSM2007: 5 th Joint ASME/JSME Fluids Engineering Conference July 30-August 2, 2007, San Diego, CA, USA FEDSM2007-37563 COMPUTATIONAL AEROACOUSTIC ANALYSIS OF OVEREXPANDED SUPERSONIC JET
More informationAero Acoustics Analysis of Car s ORVM
International Journal of Science and Engineering Investigations vol. 4, issue 38, March 2015 ISSN: 2251-8843 Aero s Analysis of Car s ORVM Roshan Kumar Gopal 1, Remin V. 2, Richard Sen 3 1 Technical Support
More informationDOUBLE DEGREE MASTER PROGRAM
DOUBLE DEGREE MASTER PROGRAM in Engineering Science/Mechanical Engineering at Warsaw University of Technology and Technical University Berlin (WUT/TUB) I SEMESTER COURSE PROGRAM WUT TUB SUBJECT SUBJECT
More informationStructural Optimization. for Acoustic Disciplines
Optimization for Acoustic Disciplines 4. Norddeutschen Simulationsforum 26 May Hamburg, Germany Claus B.W. Pedersen (claus.pedersen@fe-design.com) Peter M. Clausen, Peter Allinger, Jens Harder FE-Design
More informationOpen Engineering: Strongly Coupled Multiphysics
Open Engineering: Strongly Coupled Multiphysics OOFELIE::Multiphysics Sensors And Actuators Multiphysics FSI Multiphyiscs CAE Consulting Vibro Acoustics, Electro- Technics, FSI-CFD, Opto-Thermo Mechanics,
More informationStudies on the Transition of the Flow Oscillations over an Axisymmetric Open Cavity Model
Advances in Aerospace Science and Applications. ISSN 2277-3223 Volume 3, Number 2 (2013), pp. 83-90 Research India Publications http://www.ripublication.com/aasa.htm Studies on the Transition of the Flow
More informationHybrid 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 informationAeroacoustic 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 informationCoupling Physics. Tomasz Stelmach Senior Application Engineer
Coupling Physics Tomasz Stelmach Senior Application Engineer Agenda Brief look @ Multiphysics solution What is new in R18 Fluent Maxwell coupling wireless power transfer Brief look @ ANSYS Multiphysics
More informationMASS LOADING EFFECTS FOR HEAVY EQUIPMENT AND PAYLOADS Revision F
MASS LOADING EFFECTS FOR HEAVY EQUIPMENT AND PAYLOADS Revision F By Tom Irvine Email: tomirvine@aol.com May 19, 2011 Introduction Consider a launch vehicle with a payload. Intuitively, a realistic payload
More informationResearch strategy for Low-Mach number aeroacoustics
Research strategy for Low-Mach number aeroacoustics Introduction Until today, most aeroacoustic research has focused on aeronautical applications where high-frequency sound is the dominating issue. For
More informationAerodynamic 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 informationNOISE REDUCTION OF CENTRIFUGAL COMPRESSORS USING ARRAY OF QUARTER WAVELENGTH RESONATORS. A Thesis NAN YE
NOISE REDUCTION OF CENTRIFUGAL COMPRESSORS USING ARRAY OF QUARTER WAVELENGTH RESONATORS A Thesis by NAN YE Submitted to the Office of Graduate and Professional Studies of Texas A&M University in partial
More informationEffect of Length and Porosity on the Acoustic Performance of Concentric Tube Resonators
Effect of Length and Porosity on the Acoustic Performance of Concentric Tube Resonators David Neihguk *1, and Abhinav Prasad 1 1 Mahindra Research Valley, Mahindra & Mahindra Ltd. *Corresponding author:
More informationComputational Acoustics by Means of Finite and Boundary Elements for Woofers, Tweeters, Horns and Small Transducers
Computational Acoustics by Means of Finite and Boundary Elements for Woofers, Tweeters, Horns and Small Transducers Alfred J. Svobodnik NAD - Numerical Analysis and Design GmbH & Co KG as@nadwork.at http://www.nadwork.at
More informationSound Engineering Test and Analysis
Sound Engineering Test and Analysis Product sound and sound quality are key aspects of product perception. How a product sounds plays a critical role in conveying the right message about its functionality,
More informationNew Developments of Frequency Domain Acoustic Methods in LS-DYNA
11 th International LS-DYNA Users Conference Simulation (2) New Developments of Frequency Domain Acoustic Methods in LS-DYNA Yun Huang 1, Mhamed Souli 2, Rongfeng Liu 3 1 Livermore Software Technology
More informationEngineering Noise Control
Engineering Noise Control Theory and practice Second edition David A. Bies and Colin H. Hansen Department of Mechanical Engineering University of Adelaide South Australia E & FN SPON An Imprint of Chapman
More informationNumerical Prediction of the Radiated Noise of Hermetic Compressors Under the Simultaneous Presence of Different Noise Sources
Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 1998 Numerical Prediction of the Radiated Noise of Hermetic Compressors Under the Simultaneous
More informationBE CAE & Test. How Apps Can Support COMSOL Multiphysics Users? Giuseppe Petrone and Carmelo Barbagallo
BE CAE & Test How Apps Can Support COMSOL Multiphysics Users? Giuseppe Petrone and Carmelo Barbagallo BE CAE & TEST, Viale Africa 170 Sc. A, 95129 Catania (ITALY) Rotterdam, 18-20 October 2017 http://www.be-caetest.it
More informationVibro-Acoustic Modelling of Hermetic Reciprocating Compressors
Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 1998 Vibro-Acoustic Modelling of Hermetic Reciprocating Compressors L. Gavric CETIM Follow
More informationFibrous Material Microstructure Design for Optimal Damping Performance
Purdue University Purdue e-pubs Publications of the Ray W. Herrick Laboratories School of Mechanical Engineering 12-8-2017 Fibrous Material Microstructure Design for Optimal Damping Performance Yutong
More informationFlow-Induced Noise Technical Group
Flow-Induced Noise Technical Group Center for Acoustics and Vibration Spring Workshop May 9, 2011 Presented by: Dean E. Capone, Group Leader 1 Overview The mission of the Flow-Induced Noise Group of the
More informationPROGRESS IN THE PREDICTION OF AEROSERVOELASTIC INSTABILITIES ON LARGE CIVIL TRANSPORT AIRCRAFT
ICAS 2000 CONGRESS PROGRESS IN THE PREDICTION OF AEROSERVOELASTIC INSTABILITIES ON LARGE CIVIL TRANSPORT AIRCRAFT M.LACABANNE, A.LAPORTE AEROSPATIALE MATRA AIRBUS, 31060 Toulouse Cedex 03, France Abstract
More informationA SIMPLE DECOUPLED MODAL CALCULATION OF SOUND TRANSMISSION BETWEEN VOLUMES
A SIMPLE DECOUPLED MODAL CALCULATION OF SOUND TRANSMISSION BETWEEN VOLUMES 43.40r Philippe JEAN; Jean-François RONDEAU Centre Scientifique et Technique du Bâtiment, 24 rue Joseph Fourier, 38400 Saint Martin
More informationinter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE
Copyright SFA - InterNoise 2000 1 inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE I-INCE Classification: 1.0 NOZZLE DESIGN EFFECT
More informationSound radiation from the open end of pipes and ducts in the presence of mean flow
Sound radiation from the open end of pipes and ducts in the presence of mean flow Ray Kirby (1), Wenbo Duan (2) (1) Centre for Audio, Acoustics and Vibration, University of Technology Sydney, Sydney, Australia
More informationFuselage Excitation During Cruise Flight Conditions: From Flight Test to Numerical Prediction
DLR.de Chart 1 Fuselage Excitation During Cruise Flight Conditions: From Flight Test to Numerical Prediction Alexander Klabes 1, Sören Callsen 2, Michaela Herr 1, Christina Appel 1 1 German Aerospace Center
More informationNUMERICAL PREDICTION OF PERFORATED TUBE ACOUSTIC IMPEDANCE
NUMERICAL PREDICTION OF PERFORATED TUBE ACOUSTIC IMPEDANCE G. Pradeep, T. Thanigaivel Raja, D.Veerababu and B. Venkatesham Department of Mechanical and Aerospace Engineering, Indian Institute of Technology
More informationFan duct noise elimination by the use of helicoidal resonators
Fan duct noise elimination by the use of helicoidal resonators Wojciech ŁAPKA 1 1 Poznan University of Technology, Institute of Applied Mechanics, Poland ABSTRACT This work focuses on describing the fan
More informationJet Noise Analysis of a Mixed Turbofan Engine
Jet Noise Analysis of a Mixed Turbofan Engine Jens TRÜMNER 1 ; Christian MUNDT 2 1,2 Institute for Thermodynamics, UniBw München, Germany ABSTRACT Due to constantly increasing flight traffic the aircraft
More informationMEASUREMENT OF INSERTION LOSS OF AN ACOUSTIC TREATMENT IN THE PRESENCE OF ADDITIONAL UNCORRELATED SOUND SOURCES
MEASUREMENT OF INSERTION LOSS OF AN ACOUSTIC TREATMENT IN THE PRESENCE OF ADDITIONAL UNCORRELATED SOUND SOURCES Jacob Klos and Daniel L. Palumbo Structural Acoustics Branch NASA Langley Research Center
More informationRadiated Sound Power from a Curved Honeycomb Panel
Radiated Sound Power from a Curved Honeycomb Panel Jay H. Robinson Ralph D. Buehrle Jacob Klos NASA Langley Research Center, Hampton, VA 23681-2199 Ferdinand W. Grosveld Lockheed Martin Engineering and
More informationLift-Off Acoustics Predictions for the Ares I Launch Pad
15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference) 11-13 May 2009, Miami, Florida AIAA 2009-3163 Lift-Off Acoustics Predictions for the Ares I Launch Pad Kenneth J. Plotkin *
More informationACOUSTIC NOISE AND VIBRATIONS DUE TO MAGNETIC FORCES IN ROTATING ELECTRICAL MACHINES
TECHNICAL TRAINING TTR01 ACOUSTIC NOISE AND VIBRATIONS DUE TO MAGNETIC FORCES IN ROTATING ELECTRICAL MACHINES 1 OBJECTIVES The objectives of the technical training are the followings: understand the phenomenon
More informationAEROACOUSTIC 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 informationAcoustic 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 informationPrediction of Light Rail Vehicle Noise in Running Condition using SEA
Prediction of Light Rail Vehicle Noise in Running Condition using SEA Sebastian PREIS ; Gérard BORELLO Siemens AG Austria Urban Transport, Austria InterAC, France ABSTRACT A complete Light Rail vehicle
More informationAPPLICATION OF HYBRID CFD/CAA TECHNIQUE FOR MODELING PRESSURE FLUCTUATIONS IN TRANSONIC FLOWS
TASK QUARTERLY Vol. 17, Nos 3 4, 2013, pp. 145 154 APPLICATION OF HYBRID CFD/CAA TECHNIQUE FOR MODELING PRESSURE FLUCTUATIONS IN TRANSONIC FLOWS SŁAWOMIR DYKAS, WŁODZIMIERZ WRÓBLEWSKI AND SEBASTIAN RULIK
More informationMulti-source Aeroacoustic Noise Prediction Method
Multi-source Aeroacoustic Noise Prediction Method Jonathan SCOTT CFD Engineer 03/12/2013 1 Introduction Trend to reduce engine displacement while increasing break power by turbo charging engines Traditionally
More informationSound diffraction by the splitter in a turbofan rotor-stator gap swirling flow
Nationaal Lucht- en Ruimtevaartlaboratorium National Aerospace Laboratory NLR Sound diffraction by the splitter in a turbofan rotor-stator gap swirling flow R.J. Nijboer This report is based on a presentation
More informationSide-View Mirror Vibrations Induced Aerodynamically by Separating Vortices
Open Journal of Fluid Dynamics, 2016, 6, 42-56 Published Online March 2016 in SciRes. http://www.scirp.org/journal/ojfd http://dx.doi.org/10.4236/ojfd.2016.61004 Side-View Mirror Vibrations Induced Aerodynamically
More informationAcoustic Environment of the VEGA Launch Vehicle at Lift-Off
Acoustic Environment of the VEGA Launch Vehicle at Lift-Off Denis Gély, Georges Elias ONERA, 22 Avenue de la Division Leclerc 92322 CHATILLON, France, {denis.gely, georges.elias}@onera.fr Flavia Mascanzoni
More informationNote that W is the skin surface weight density in units of psf. An equivalent graph in terms of metric units is given in Appendix A.
VIBRATION RESPONSE OF A CYLINDRICAL SKIN TO ACOUSTIC PRESSURE VIA THE FRANKEN METHOD Revision H By Tom Irvine Email: tomirvine@aol.com September 16, 2008 Introduction The front end of a typical rocket
More informationMicrophone Array Measurements: Sound Source Localization by means of SODIX
Microphone Array Measurements: Sound Source Localization by means of SODIX Stefan Funke, Henri Siller, Lars Enghardt Engine Acoustics, Institute of Propulsion Technology German Aerospace Center Outline
More informationAn overview of Onera aeroacoustic activities in the framework of propellers and open rotors
An overview of Onera aeroacoustic activities in the framework of propellers and open rotors Y. Delrieux Onera. Computational Fluid Dynamics and Aeroacoustics A.Chelius, A. Giauque, S. Canard-Caruana, F.
More informationBEM Methods for Acoustic and Vibroacoustic Problems in LS-DYNA
12 th International LS-DYNA Users Conference Simulation(2) BEM Methods for Acoustic and Vibroacoustic Problems in LS-DYNA Mhamed Souli, Yun Huang, Rongfeng Liu Livermore Software Technology Corporation
More informationAeroacoustic Evaluation of an Axial Fan using CFD Methods Frederik Folke, Martin Hildenbrand (ITB Ingenieure GmbH)
Aeroacoustic Evaluation of an Axial Fan using CFD Methods Frederik Folke, Martin Hildenbrand (ITB Ingenieure GmbH) ITB_SGC_AeroacousticEvaluationOfAnAxialFanUsingCFDMethods_160803.pptx ITB GmbH, Folke,
More informationCFD in COMSOL Multiphysics
CFD in COMSOL Multiphysics Mats Nigam Copyright 2016 COMSOL. Any of the images, text, and equations here may be copied and modified for your own internal use. All trademarks are the property of their respective
More informationAEROSPACE ENGINEERING
AEROSPACE ENGINEERING Subject Code: AE Course Structure Sections/Units Topics Section A Engineering Mathematics Topics (Core) 1 Linear Algebra 2 Calculus 3 Differential Equations 1 Fourier Series Topics
More informationAcoustic and Vibration Stability Analysis of Furnace System in Supercritical Boiler
Acoustic and Vibration Stability Analysis of Furnace System in Supercritical Boiler Hyuk-Min Kwon 1 ; Chi-Hoon Cho 2 ; Heui-Won Kim 3 1,2,3 Advanced Technology Institute, Hyundai Heavy Industries, Co.,
More informationComparative study between random vibration and linear static analysis using Miles method for thruster brackets in space structures
Comparative study between random vibration and linear static analysis using Miles method for thruster brackets in space structures Ion DIMA*,1, Cristian-Gheorghe MOISEI 1, Calin-Dumitru COMAN 1, Mihaela
More informationSonic Response Analysis (SRA) Tool Vibro-Acoustic Capabilities
Sonic Response Analysis (SRA) Tool Vibro-Acoustic Capabilities Mostafa Rassaian, Ph.D., P.E., Technical Fellow Structural Technology Boeing Research & Technology Tom Arakawa, Program Analyst, Structural
More informationSTAR-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 informationinter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE
Copyright SFA - InterNoise 2000 1 inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE I-INCE Classification: 7.0 VIBRATIONS OF FLAT
More informationSound attenuation analysis of waterfilled perforated pipe silencers using three-dimensional time-domain computational fluid dynamics approach
Research Article Sound attenuation analysis of waterfilled perforated pipe silencers using three-dimensional time-domain computational fluid dynamics approach Advances in Mechanical Engineering 2016, Vol.
More informationIMPLEMENTING THE FFOWCS WILLIAMS AND HAWKINGS ACOUSTIC ANALOGY IN ANTARES
IMPLEMENTING THE FFOWCS WILLIAMS AND HAWKINGS ACOUSTIC ANALOGY IN ANTARES Danilo Di Stefano, Aldo Rona, Edward Hall Department of Engineering, University of Leicester, University Road, LE1 7RH, Leicester,
More informationApplication of LS-DYNA to NVH Solutions in the Automotive Industry
14 th International LS-DYNA Users Conference Session: Simulation Application of LS-DYNA to NVH Solutions in the Automotive Industry Prasanna S. Kondapalli, Tyler Jankowiak BASF Corp., Wyandotte, MI, U.S.A
More informationNumerical Modelling of Aerodynamic Noise in Compressible Flows
Open Journal of Fluid Dynamics 22 2 65-69 http://dx.doi.org/.4236/ofd.22.237 Published Online September 22 (http://www.scirp.org/ournal/ofd) Numerical Modelling of Aerodynamic Noise in Compressible Flows
More informationComputational Aeroacoustics
Computational Aeroacoustics Duct Acoustics Gwénaël Gabard Institute of Sound and Vibration Research University of Southampton, UK gabard@soton.ac.uk ISVR, University of Southampton, UK ERCOFTAC Computational
More informationINTRODUCTION. Smooth Passage for an Artificial Satellite - Combustion Test Title - Necessity of Next Term Solid Rocket. Designing the Launch Complex
R E S E A R C H INTRODUCTION Smooth Passage for an Artificial Satellite - Combustion Test Title - Necessity of Next Term Solid Rocket In September 2006, the "M-V (Mu (µ)-five)," a rocket developed by the
More informationANALYSIS AND EXPERIMENT OF DYNAMIC CHARACTERISTICS OF ELECTRONIC DEVICE CHASSIS
ANALYSIS AND EXPERIMENT OF DYNAMIC CHARACTERISTICS OF ELECTRONIC DEVICE CHASSIS HE QING, DU DONGMEI, JIANG XUCHAO Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry
More informationPUBLICATIONS PROF. CHRISTOPHE SCHRAM
PUBLICATIONS PROF. CHRISTOPHE SCHRAM 2013-2000 PhD Thesis : Aeroacoustics of subsonic jets: prediction of the sound produced by vortex pairing based on particle image velocimetry PhD thesis, 2003, Technische
More informationON SOUND POWER MEASUREMENT OF THE ENGINE IN ANECHOIC ROOM WITH IMPERFECTIONS
ON SOUND POWER MEASUREMENT OF THE ENGINE IN ANECHOIC ROOM WITH IMPERFECTIONS Mehdi Mehrgou 1, Ola Jönsson 2, and Leping Feng 3 1 AVL List Gmbh., Hans-list-platz 1,8020, Graz, Austria 2 Scania CV AB, Södertälje,
More informationCorrelations between density fluctuations and acoustic far field in free jets using Rayleigh scattering
53 rd 3AF International Conference on Applied Aerodynamics 26 28 March 218, Salon de Provence France FP7-AERO218-mercier Correlations between density fluctuations and acoustic far field in free jets using
More informationAnalogy Electromagnetism - Acoustics: Validation and Application to Local Impedance Active Control for Sound Absorption
Analogy Electromagnetism - Acoustics: Validation and Application to Local Impedance Active Control for Sound Absorption L. Nicolas CEGELY - UPRESA CNRS 5005 - Ecole Centrale de Lyon BP63-693 Ecully cedex
More informationSound radiation and transmission. Professor Phil Joseph. Departamento de Engenharia Mecânica
Sound radiation and transmission Professor Phil Joseph Departamento de Engenharia Mecânica SOUND RADIATION BY A PISTON The piston generates plane waves in the tube with particle velocity equal to its own.
More informationINFLUENCE OF FILL EFFECT ON PAYLOAD IN A LARGE LAUNCH VEHICLE FAIRING
INFLUENCE OF FILL EFFECT ON PAYLOAD IN A LARGE LAUNCH VEHICLE FAIRING Zheng Ling State Key Laboratory of Mechanical Transmission, College of Automotive Engineering, Chongqing University, Chongqing email:
More informationMULTI-STAGE SUBORBITAL LAUNCHER MODAL AND DYNAMIC TEST PROGRAM
Review of the Air Force Academy No 3 (30) 2015 MULTI-STAGE SUBORBITAL LAUNCHER MODAL AND DYNAMIC TEST PROGRAM Mihai MIHAILA-ANDRES*, Flore LICA*, Paul-Virgil ROSU** * Institute for Theoretical & Experimental
More informationFlow-Induced Noise Technical Group
Flow-Induced Noise Technical Group Center for Acoustics and Vibration Spring Workshop May 4, 2010 Presented by: Dean E. Capone, Group Leader 1 Overview The mission of the Flow-Induced Noise Group of the
More informationSide branch resonators modelling with Green s function methods
Side branch resonators modelling with Green s function methods E. Perrey-Debain, R. Maréchal, J.-M. Ville Laboratoire Roberval UMR 6253, Equipe Acoustique, Université de Technologie de Compiègne, France
More informationAcoustics Laboratory
Acoustics Laboratory 1 at the Center for Noise and Vibration Control in ME, KAIST Supervisor: Prof. Jeong-Guon Ih (e-mail: J.G.Ih@kaist.ac.kr) Lab members: (as of March 2015) Ph.D. Students: 6 (1 part-time
More informationPASSIVE NOISE CONTROL OF A BURNER-COMBUSTOR SYSTEM OF A TURBO-FAN ENGINE
ICSV14 Cairns Australia 9-1 July, 007 PASSIVE NOISE CONTROL OF A BURNER-COMBUSTOR SYSTEM OF A TURBO-FAN ENGINE Ayman El-Badawy 1 and Wael EL-ARNA'OUTY 1 Department of Engineering Mechanics, The German
More informationSjoerd Rienstra: Mathematician in Aeroacoustics Legacy at NLR
Sjoerd Rienstra: Mathematician in Aeroacoustics Legacy at NLR Harry Brouwer Sjoerd and NLR (NLR = Nederlands Lucht- en Ruimtevaartcentrum Netherlands Aerospace Centre) Worked at NLR from 1979 to 1986 Short
More informationDouble Degree Master Program in Engineering Science (DDMPES) Module Catalogue
Double Degree Master Program in Engineering Science (DDMPES) Module Catalogue The DDMPES shall consist of the following categories: 18 credits advanced mathematical courses 24 credits + project (6 credits)
More informationFar 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 informationSound power qualification of a turbocharger in enclosed environment using an innovating acoustic imaging processing: Generalized Acoustic Holography
Sound power qualification of a turbocharger in enclosed environment using an innovating acoustic imaging processing: Generalized Acoustic Holography A. Sébastien PAILLASSEUR 1, B. Thibaut LE MAGUERESSE
More information