Large Eddy Simulations for the Flame Describing Function of a premixed turbulent swirling flame
|
|
- Eugene Newman
- 5 years ago
- Views:
Transcription
1 Large Eddy Simulations for the Flame Describing Function of a premixed turbulent swirling flame Davide LAERA, and Aimee S. MORGANS Department of Mechanical Engineering, Imperial College London, London, UK 7 September 2017
2 2 Outline Motivations Objectives of the work Numerical and experimental setups Flame Describing Function calculations Preliminary results analysis Conclusions and ongoing works
3 Flow rate and mixture composition disturbances Thermoacoustic combustion instabilities Heat release rate perturbations Acoustic oscillations Harms of combustion instabilities: Augment noise emission. Increase heat fluxes and thermal fatigue. Cause structural vibrations. Flashback and flame out. Multiple swirled injector combustor and damaged system (Goy et al. (2006)) 3
4 4 Motivations Many are the theoretical, numerical studies focusing on limit cycles predictions of combustion instabilities in longitudinal and azimuthal combustor Theoretical Acoustic Network Helmholtz Solver Noiray et al. (2011) Bauerheim et al. (2013) Campa and Camporeale (2014)
5 5 Motivations Many are the theoretical, numerical studies focus on limit cycles predictions of combustion instabilities in longitudinal and azimuthal combustor. These approaches rely on the model for the response of the flame to oncoming acoustic perturbations. Upstream acoustic perturbation Responding flame heat release rate fluctuation (Q 0) In the frequency domain, this correlation is given in terms of the Flame Describing Function F Q ഥQ = F ω, u 1 u 1 Τതu 1 u 1 F ω, u 1 Τ തu = G ω, u 1 Τതu 1 e iφ(ω, u 1 Τ ഥu 1 )
6 LES approaches for FDF FULLY COMPRESSIBLE LES PROS Acoustic waves are directly simulated Able to capture correctly the interactions between the acoustic waves with the flame and hydrodynamic fluctuations CONS Non-reflective boundary conditions Reduced time step Cannot be used for computation of the entire FDF Bauerheim et al., Proceedings of the Combustion Institute, vol
7 LES approaches for FDF INCOMPRESSIBLE LES PROS Increased time step with respect to compressible LES Non-reflective BC not required. Multiple frequencies can be simulated in reasonable time. CONS Mapping of the acoustic fluctuations as hydrodynamic fluctuations Han et al., Combustion and Flame, vol. 162(10). 7
8 8 Objectives of the study To perform incompressible LES are able to simulate the flame response of a premixed swirling flame using an incompressible LES: Verify if the proposed methodology is able to predict the dynamic phenomena due to the presence of the swirl. To compute the FDF of the swirled burner developed at NTNU university in a frequency range from 300 Hz to 1900 Hz for two level of velocity amplitudes.
9 The experimental setup x y Worth and Dawson., Combustion and Flame, vol
10 10 The numerical domain b cc =2.2d b chosen in order to have the same flame-wall distance of the annular combustor. h/dt=2.5 Bluff Body + 6 blades swirl of 60 Re ~ based on d b C 2 H 4 -Air perfectly mixture F=0.7 x y
11 11 Numerical modelling OpenFOAM C 2 H 4 /air reaction mechanism Combustion model SGS turbulence model Time-step size Convective divergence Time integration Compressibility 1-step global Partially-Stirred Reactor (PaSR) (Chen, CST, 1997) Dynamic Smagorinsky 1 x 10-6 s Second Order central difference scheme + Sweby flux limiter 2nd-order implicit Crank- Nicolson scheme Incompressible (state equation: ρ(t) = p 0 /RT) 9M fully structured mesh with max y+ ~ 1
12 12 y x u x ( Τ m s) Results: Unforced configuration [1/2] M-flame type Flame is anchored at the shear layers from the wake of the bluff body and the side recirculation zones Flame touches only marginally the adiabatic walls y x T(K) M - Flame
13 13 Modelling of the acoustic forcing U = U in 1 + Τ u തu sin(2πf) where u Τതu is the velocity fluctuations amplitude, f the forcing frequency and U in is the mean inlet velocity. Analysed Frequencies (Hz) Analysed Amplitude Levels (-) Τ u തu =0.1 Τ u തu =0.2
14 Q തሶ Q ሶ Amplitude 14 Signal processing: amplitude Example of heat release rate signals at two different acoustic frequencies from LES simulations: Τ u തu =0.1 f=500 Hz, f=1000 Hz Time signals FFT Time Frequency Frequency f (Hz)
15 15 Signal processing: amplitude Example of the calculation of the phase-lag between the velocity reference signal and heat release rate signal from the LES: Τ u തu =0.1 f=500 Hz Time signals Cross correlation
16 16 The Flame Describing Function Fist local minimum at f=800 Hz Gain response of approx. 0.5 in the high frequency region. The present LES simulations are proved to be able to capture the phenomena leading to the presence of local maximum and minimum in the flame response. Increasing the longitudinal forcing amplitude level, the nonlinearity of the gain is clearly evident.
17 17 The Flame Describing Function Almost a linear variation of the phase is obtained increasing the frequencies with exception of the points where a gain local minimum is predicted where a sudden phase variation is observed
18 Mode conversion mechanisms: experimental EM2C Lab. (Paris) 18 Gain Peak Gain Minimum Palies et al., Combustion and Flame, 2010.
19 19 Preliminary numerical investigations Gain Peak f = 500Hz, Τ u തu = 0. 1 UW Gain Mininum f = 800 Hz, Τ u തu = 0. 1 LW
20 20 Conclusions and Ongoing Work Incompressible LES have been used to predict the Flame Describing Function of the premised swirling M-type flame featured by an annular combustor developed at NTNU university. Simulations have been performed in a frequency range between Hz considering two amplitude levels u Τതu =0.1 and u Τതu =0.2. Numerical predictions retrieve a FDF with a maximum peak at 500Hz and with a gain of 0.5 at high frequencies, where instabilities phenomena have been observed. The presence of minimum and maximum points have been also observed, proving that incompressible LES are able to capture the mode conversion phenomena featured by this type of flames. Ongoing work: validation of the numerical results with experiments.
21 Davide Laera* Department of Mechanical Engineering Imperial College London London, UK * d.laera@imperial.ac.uk
XXXVIII Meeting of the Italian Section of the Combustion Institute
Coupling a Helmholtz solver with a Distributed Flame Transfer Function (DFTF) to study combustion instability of a longitudinal combustor equipped with a full-scale burner D. Laera*, S.M. Camporeale* davide.laera@poliba.it
More informationThermoacoustic Instabilities Research
Chapter 3 Thermoacoustic Instabilities Research In this chapter, relevant literature survey of thermoacoustic instabilities research is included. An introduction to the phenomena of thermoacoustic instability
More informationValida&on of the FDF methodology with a mul&dimensional Helmholtz solver
Valida&on of the FDF methodology with a mul&dimensional Helmholtz solver Alexis Cuquel, Frédéric Boudy, Daniel Durox, Thierry Schuller and Sébas;en Candel Laboratoire EM2C CNRS Ecole Centrale Paris. KIAI
More informationA Novel FEM Method for Predicting Thermoacoustic Combustion Instability
Excerpt from the Proceedings of the COMSOL Conference 009 Milan A Novel FEM Method for Predicting Thermoacoustic Combustion Instability G. Campa *, S.M. Camporeale Politecnico di Bari * campa@imedado.poliba.it,
More informationUniversità degli Studi di Firenze Dipartimento di Energetica Sergio Stecco
Università degli Studi di Firenze Dipartimento di Energetica Sergio Stecco Thermo-Acoustic Analysis of an Advanced Lean Injection System in a Tubular Combustor Configuration A. Andreini 1, B. Facchini
More informationNew sequential combustion technologies for heavy-duty gas turbines
New sequential combustion technologies for heavy-duty gas turbines Conference on Combustion in Switzerland 07.09.2017 ETH Zurich Nicolas Noiray, Oliver Schulz CAPS Lab D-MAVT ETH Nicolas Noiray 07/09/17
More informationDispersion of Entropy Perturbations Transporting through an Industrial Gas Turbine Combustor
Flow Turbulence Combust (218) 1:481 52 DOI 1.17/s1494-17-9854-6 Dispersion of Entropy Perturbations Transporting through an Industrial Gas Turbine Combustor Yu Xia 1 Ignacio Duran 2 Aimee S. Morgans 1
More informationCombustion Instability Modelling Using Different Flame Models
Combustion Instability Modelling Using Different Flame Models Somayeh Nosrati Shoar, Abbas Fakhrtabatabaei MAPNA Turbine Engineering and Manufacturing Company (TUGA MAPNA Building, No., Mirdamad Ave, Tehran,
More informationGT Proceedings of the ASME Turbo Expo 2013 GT 2013 June 3-7, 2013, San Antonio, USA
Proceedings of the ASME Turbo Expo 213 GT 213 June 3-7, 213, San Antonio, USA GT213-95659 PREDICTION OF THE NONLINEAR DYNAMICS OF A MULTIPLE FLAME COMBUSTOR BY COUPLING THE DESCRIBING FUNCTION METHODOLOGY
More informationThermoacoustic Analysis of Combustion Instability Importing RANS Data
Thermoacoustic Analysis of Combustion Instability Importing RANS Data Giovanni Campa Sergio Camporeale Dipartimento di Meccanica, Matematica e Management Politecnico di Bari Bari, Italy Ezio Cosatto Ansaldo
More informationExperimental analysis and large eddy simulation to determine the response of non premixed flame submitted to acoustic forcing
Experimental analysis and large eddy simulation to determine the response of non premixed flame submitted to acoustic forcing B. Varoquié, J.P. Légier, F. Lacas, D. Veynante and T. Poinsot Laboratoire
More informationADVANCED DES SIMULATIONS OF OXY-GAS BURNER LOCATED INTO MODEL OF REAL MELTING CHAMBER
ADVANCED DES SIMULATIONS OF OXY-GAS BURNER LOCATED INTO MODEL OF REAL MELTING CHAMBER Ing. Vojtech Betak Ph.D. Aerospace Research and Test Establishment Department of Engines Prague, Czech Republic Abstract
More informationHELMHOLTZ RESONATORS FOR DAMPING COMBUSTOR THERMOACOUSTICS
HELMHOLTZ RESONATORS FOR DAMPING COMBUSTOR THERMOACOUSTICS Dong Yang and Aimee S. Morgans Department of Aeronautics, Imperial College London, London, UK, SW7 AZ email: d.yang13@imperial.ac.uk Helmholtz
More informationDynamics of Lean Premixed Systems: Measurements for Large Eddy Simulation
Dynamics of Lean Premixed Systems: Measurements for Large Eddy Simulation D. Galley 1,2, A. Pubill Melsió 2, S. Ducruix 2, F. Lacas 2 and D. Veynante 2 Y. Sommerer 3 and T. Poinsot 3 1 SNECMA Moteurs,
More informationUNIFIED FRAMEWORK FOR COMBUSTION INSTABILITY ANALYSIS : PROGRESS AND LIMITATIONS. Corresponding author:
n 3 l - Int l Summer School and Workshop on Non-Normal and Nonlinear Effects in Aero- and Thermoacoustics, June 18 21, 213, Munich n³l THE FLAME DESCRIBING FUNCTION (FDF) UNIFIED FRAMEWORK FOR COMBUSTION
More informationSTABILITY ANALYSIS OF A MATRIX BURNER FLAME USING A GENERALISED HEAT RELEASE RATE LAW FEATURING MULTIPLE TIME-LAGS
STABILITY ANALYSIS OF A MATRIX BURNER FLAME USING A GENERALISED HEAT RELEASE RATE LAW FEATURING MULTIPLE TIME-LAGS Sreenath Malamal Gopinathan and Maria A. Heckl Keele University, School of Chemical and
More informationS. Kadowaki, S.H. Kim AND H. Pitsch. 1. Motivation and objectives
Center for Turbulence Research Annual Research Briefs 2005 325 The dynamics of premixed flames propagating in non-uniform velocity fields: Assessment of the significance of intrinsic instabilities in turbulent
More informationLarge Eddy Simulation of Piloted Turbulent Premixed Flame
Large Eddy Simulation of Piloted Turbulent Premixed Flame Veeraraghava Raju Hasti, Robert P Lucht and Jay P Gore Maurice J. Zucrow Laboratories School of Mechanical Engineering Purdue University West Lafayette,
More informationThermoacoustic Instabilities in a Gas Turbine Combustor
Thermoacoustic Instabilities in a Gas Turbine Combustor The Royal Institute of Technology School of Technological Sciences Department of Vehicle and Aeronautical Engineering The Marcus Wallenberg Laboratory
More informationLarge-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 informationWell Stirred Reactor Stabilization of flames
Well Stirred Reactor Stabilization of flames Well Stirred Reactor (see books on Combustion ) Stabilization of flames in high speed flows (see books on Combustion ) Stabilization of flames Although the
More informationThus d evelopment r esearch and technology is needed to suppress the thermo- a coustic instability Model- based design and control, as well as to shor
2016 International Conference ISBN: 978-1-60595-378-6 on Material Science and Civil Engineering (MSCE 2016) D evelopment Segmented Dynamic Combustion M odel to I nvestigate Instability G as Turbine Jiwoong
More informationA GREEN S FUNCTION APPROACH TO THE STUDY OF HYSTERESIS IN A RIJKE TUBE
A GREEN S FUNCTION APPROACH TO THE STUDY OF HYSTERESIS IN A RIJKE TUBE Alessandra Bigongiari and Maria Heckl School of Computing and Mathematics, Keele University, ST55BG Keele, Newcastle-under-Lyme, Staffordshire,UK
More informationA mixed acoustic-entropy combustion instability in a realistic gas turbine
Center for Turbulence Research Proceedings of the Summer Program 2012 449 A mixed acoustic-entropy combustion instability in a realistic gas turbine By E. otheau, L. Selle, Y. ery, T. Poinsot AND F. Nicoud
More informationExperimental investigation of combustion instabilities in lean swirl-stabilized partially-premixed flames in single- and multiple-burner setup
Original Research Article Experimental investigation of combustion instabilities in lean swirl-stabilized partially-premixed flames in single- and multiple-burner setup International Journal of Spray and
More informationAcoustic and Large Eddy Simulation studies of azimuthal modes in annular combustion chambers
Acoustic and Large Eddy Simulation studies of azimuthal modes in annular combustion chambers Pierre Wolf, Gabriel Staffelbach, Laurent Y.M. Gicquel, Jens-Dominik Müller, Thierry Poinsot To cite this version:
More informationChapter 7. Discussion, Conclusions and Recommendations
Chapter 7 Discussion, Conclusions and Recommendations 286 7.1 Overview of experimental results 7.1.1 Free vortex geometry Free vortex geometry flows exhibit a wide range of behavior depending not only
More informationBest Practice Guidelines for Combustion Modeling. Raphael David A. Bacchi, ESSS
Best Practice Guidelines for Combustion Modeling Raphael David A. Bacchi, ESSS PRESENTATION TOPICS Introduction; Combustion Phenomenology; Combustion Modeling; Reaction Mechanism; Radiation; Case Studies;
More informationTackling Combustor Design Problems with Large Eddy Simulation of Reacting Flows
MUSAF II Colloquium Sep. 18-20, 2013, CERFACS, Toulouse Tackling Combustor Design Problems with Large Eddy Simulation of Reacting Flows Wolfgang Polifke Fachgebiet für Thermodynamik Acknowledgements: Joao
More informationIdentification of azimuthal modes in annular combustion chambers
Center for Turbulence Research Annual Research Briefs 2011 249 Identification of azimuthal modes in annular combustion chambers By T. Poinsot, P. Wolf, G. Staffelbach, L. Y. M. Gicquel AND J. D. Muller
More informationTURBINE BURNERS: Engine Performance Improvements; Mixing, Ignition, and Flame-Holding in High Acceleration Flows
TURBINE BURNERS: Engine Performance Improvements; Mixing, Ignition, and Flame-Holding in High Acceleration Flows Presented by William A. Sirignano Mechanical and Aerospace Engineering University of California
More informationStudies of mean and unsteady flow in a swirled combustor using experiments, acoustic analysis and Large Eddy Simulations
Studies of mean and unsteady flow in a swirled combustor using experiments, acoustic analysis and Large Eddy Simulations S. Roux a,, G. Lartigue a, T. Poinsot a,b, U. Meier c and C. Bérat d a CERFACS,
More informationModelling thermo-acoustic instabilities in an oxy-fuel premixed burner
Modelling thermo-acoustic instabilities in an oy-fuel premied burner Nils Erland L. Haugen Øyvind Langørgen Sigurd Sannan Acknowledgements This presentation forms a part of the BIGCO project, performed
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 informationFeedback control of combustion instabilities from within limit cycle oscillations using H loop-shaping and the ν-gap metric
rspa.royalsocietypublishing.org Research Article submitted to journal Feedback control of combustion instabilities from within limit cycle oscillations using H loop-shaping and the ν-gap metric Jingxuan
More informationSpontaneous Oscillations in LNGT Combustors: CFD Simulation
Spontaneous Oscillations in LNGT Combustors: CFD Simulation V. Di Sarli, A. Di Benedetto and F. S. Marra Istituto di Ricerche sulla Combustione - C.N.R., Naples - ITALY INTRODUCTION The development of
More informationUNSTEADY FLOW EVOLUTION AND FLAME DYNAMICS IN A LEAN-PREMIXED SWIRL-STABILIZED COMBUSTOR
UNSTEADY FLOW EVOLUTION AND FLAME DYNAMICS IN A LEAN-PREMIXED SWIRL-STABILIZED COMBUSTOR Ying Huang and Vigor Yang Department of Mechanical Engineering The Pennsylvania State University University Park,
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 informationSimulation of a lean direct injection combustor for the next high speed civil transport (HSCT) vehicle combustion systems
Center for Turbulence Research Annual Research Briefs 27 241 Simulation of a lean direct injection combustor for the next high speed civil transport (HSCT) vehicle combustion systems By H. El-Asrag, F.
More informationLiquid-Rocket Transverse Triggered Combustion Instability: Deterministic and Stochastic Analyses
Liquid-Rocket Transverse Triggered Combustion Instability: Deterministic and Stochastic Analyses by W. A. Sirignano Mechanical and Aerospace Engineering University of California, Irvine Collaborators:
More informationarxiv: v1 [physics.flu-dyn] 25 Nov 2018
Combustion regimes in sequential combustors: Flame propagation and autoignition at elevated temperature and pressure O. Schulz,a, N. Noiray,a a CAPS Laboratory, Department of Mechanical and Process Engineering,
More informationOverview of Turbulent Reacting Flows
Overview of Turbulent Reacting Flows Outline Various Applications Overview of available reacting flow models LES Latest additions Example Cases Summary Reacting Flows Applications in STAR-CCM+ Ever-Expanding
More informationOpen Archive Toulouse Archive Ouverte (OATAO)
Open Archive Toulouse Archive Ouverte (OATAO) OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited
More informationImpact of the Flame-Holder Heat-Transfer Characteristics on the Onset of Combustion Instability
Impact of the Flame-Holder Heat-Transfer Characteristics on the Onset of Combustion Instability The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story
More informationSpatial and Temporal Averaging in Combustion Chambers
Spatial and Temporal Averaging in Combustion Chambers F.E.C. Culick California Institute of Technology 18 January, 2010 Combustion Workshop IIT Chennai ReferenceRTO 039 1 I Introduction II Chief Mechanisms
More informationCombining a Helmholtz solver with the flame describing function to assess combustion instability in a premixed swirled combustor
Combining a Helmholtz solver with the flame describing function to assess combustion instability in a premixed swirled combustor Camilo Silva, Franck Nicoud, Thierry Schuller, Daniel Durox, Sébastien Candel
More informationModeling instabilities in lean premixed turbulent combustors using detailed chemical kinetics
Accepted for publication in Combustion Science and Technology Modeling instabilities in lean premixed turbulent combustors using detailed chemical kinetics Bjørn Lilleberg, Ivar S. Ertesvåg and Kjell Erik
More informationComputation of Forced Premixed Flames Dynamics
Computation of Forced Premixed Flames Dynamics S.Ruan 1,, T.D. Dunstan 1,+, N.Swaminathan 1, R.Balachandran 2 1 Engineering Department, Cambridge University, Trumpington Street, Cambridge CB2 1PZ, UK.
More informationNumerical Studies of Supersonic Jet Impingement on a Flat Plate
Numerical Studies of Supersonic Jet Impingement on a Flat Plate Overset Grid Symposium Dayton, OH Michael R. Brown Principal Engineer, Kratos/Digital Fusion Solutions Inc., Huntsville, AL. October 18,
More informationLarge Eddy Simulation of Flame Flashback by Combustion Induced Vortex Breakdown
June 30 - July 3, 2015 Melbourne, Australia 9 1C-5 Large Eddy Simulation of Flame Flashback by Combustion Induced Vortex Breakdown Eike Tangermann Institut für Mathematik und Rechneranwendung Universität
More informationFLAME AND FLOW DYNAMICS OF A SELF-EXCITED, STANDING WAVE CIRCUMFERENTIAL INSTABILITY IN A MODEL ANNULAR GAS TURBINE COMBUSTOR
Proceedings of the ASME Turbo Expo 2013, Power for Land, Sea, and Air GT2013 June 3-7, 2013, San Antonio, Texas GT2013-95897 FLAME AND FLOW DYNAMICS OF A SELF-EXCITED, STANDING WAVE CIRCUMFERENTIAL INSTABILITY
More informationHEAT TRANSFER IN A RECIRCULATION ZONE AT STEADY-STATE AND OSCILLATING CONDITIONS - THE BACK FACING STEP TEST CASE
HEAT TRANSFER IN A RECIRCULATION ZONE AT STEADY-STATE AND OSCILLATING CONDITIONS - THE BACK FACING STEP TEST CASE A.K. Pozarlik 1, D. Panara, J.B.W. Kok 1, T.H. van der Meer 1 1 Laboratory of Thermal Engineering,
More informationON GENERATION OF ENTROPY WAVES BY A PREMIXED FLAME
This is a preprint version. Published in: Proceedings of the ASME Turbo Expo 206, 3 7 June 206, Seoul, South Korea Paper number: GT206-57026 DOI: 0.5/GT206-57026 ON GENERATION OF ENTROPY WAVES BY A PREMIXED
More informationEffects of Variation of the Flame Area and Natural Damping on Primary Acoustic Instability of Downward Propagating Flames in a Tube
5 th ICDERS August 7, 015 Leeds, UK Effects of Variation of the Flame Area and Natural Damping on Primary Acoustic Instability of Downward Propagating Flames in a Tube Sung Hwan Yoon and Osamu Fujita Division
More informationDirect numerical simulation of interfacial instability in gas-liquid flows
Direct numerical simulation of interfacial instability in gas-liquid flows Iain Bethune 1, Lennon Ó Náraigh 2, David Scott 1, Peter Spelt 3,4, Prashant Valluri 5, Zlatko Solomenko 3 1 Edinburgh Parallel
More informationRole of Azimuthal Flow Fluctuations on Flow Dynamics and Global Flame Response of Axisymmetric Swirling Flames
Role of Azimuthal Flow Fluctuations on Flow Dynamics and Global Flame Response of Axisymmetric Swirling Flames Vishal Acharya 1 and Tim Lieuwen 2 Georgia Institute of Technology, Atlanta, GA, 3332 Recent
More informationNumerical Simulation of Hydrogen Gas Turbines using Flamelet Generated Manifolds technique on Open FOAM
Numerical Simulation of Hydrogen Gas Turbines using Flamelet Generated Manifolds technique on Open FOAM Alessio Fancello (M.Sc.) Department of Mechanical Engineering Combustion Technology Technische Universiteit
More informationWall-Functions and Boundary Layer Response to Pulsating and Oscillating Turbulent Channel Flows
K. Hanjalić, Y. Nagano and S. Jakirlić (Editors) Wall-Functions and Boundary Layer Response to Pulsating and Oscillating Turbulent Channel Flows D. Panara 1, M. Porta 2,R. Dannecker 1, and B. Noll 1 1
More informationDevelpment of NSCBC for compressible Navier-Stokes equations in OpenFOAM : Subsonic Non-Reflecting Outflow
Develpment of NSCBC for compressible Navier-Stokes equations in OpenFOAM : Subsonic Non-Reflecting Outflow F. Piscaglia, A. Montorfano Dipartimento di Energia, POLITECNICO DI MILANO Content Introduction
More informationANSYS Advanced Solutions for Gas Turbine Combustion. Gilles Eggenspieler 2011 ANSYS, Inc.
ANSYS Advanced Solutions for Gas Turbine Combustion Gilles Eggenspieler ANSYS, Inc. 1 Agenda Steady State: New and Existing Capabilities Reduced Order Combustion Models Finite-Rate Chemistry Models Chemistry
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 informationWilliam A. Sirignano Mechanical and Aerospace Engineering University of California, Irvine
Combustion Instability: Liquid-Propellant Rockets and Liquid-Fueled Ramjets William A. Sirignano Mechanical and Aerospace Engineering University of California, Irvine Linear Theory Nonlinear Theory Nozzle
More informationCFD Analysis of Vented Lean Hydrogen Deflagrations in an ISO Container
35 th UKELG Meeting, Spadeadam, 10-12 Oct. 2017 CFD Analysis of Vented Lean Hydrogen Deflagrations in an ISO Container Vendra C. Madhav Rao & Jennifer X. Wen Warwick FIRE, School of Engineering University
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 informationDirect pore level simulation of premixed gas combustion in porous inert media using detailed chemical kinetics
Direct pore level simulation of premixed gas combustion in porous inert media using detailed chemical kinetics Ilian Dinkov, Peter Habisreuther, Henning Bockhorn Karlsruhe Institute of Technology, Engler-Bunte-Institute,
More informationNumerical prediction of interaction between combustion, acoustics and vibration in gas turbines
Numerical prediction of interaction between combustion, acoustics and vibration in gas turbines A. Pozarlik and J. B. W. Kok University of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands a.k.pozarlik@utwente.nl
More informationOpenFOAM for LES of premixed combustion and mixing processes. Hannes Kröger, Steffen Jahnke, Nikolai Kornev, Egon Hassel
OpenFOAM for LES of premixed combustion and mixing processes Hannes Kröger, Steffen Jahnke, Nikolai Kornev, Egon Hassel 1 Introduction LTT Rostock: OpenFOAM is used for LES in different projects LES of
More informationNumerical Investigations of the Response of a Simplified Burner-heat exchanger System to Inlet Velocity Excitations
Numerical Investigations of the Response of a Simplified Burner-heat exchanger System to Inlet Velocity Excitations Naseh Hosseini, Viktor Kornilov, Joan Teerling, Ines Lopez Arteaga and Philip de Goey
More informationLES Approaches to Combustion
LES Approaches to combustion LES Approaches to combustion LES Approaches to Combustion W P Jones Department of Mechanical Engineering Imperial College London Exhibition Road London SW7 2AZ SIG on Combustion
More informationDARS overview, IISc Bangalore 18/03/2014
www.cd-adapco.com CH2O Temperatur e Air C2H4 Air DARS overview, IISc Bangalore 18/03/2014 Outline Introduction Modeling reactions in CFD CFD to DARS Introduction to DARS DARS capabilities and applications
More informationThe Pennsylvania State University. The Graduate School. College of Engineering COMBUSTION INSTABILITY MECHANISMS
The Pennsylvania State University The Graduate School College of Engineering COMBUSTION INSTABILITY MECHANISMS IN A LEAN PREMIXED GAS TURBINE COMBUSTOR A Dissertation in Mechanical Engineering by Hyung
More informationComparison of direct and indirect combustion noise mechanisms in a model combustor
Comparison of direct and indirect combustion noise mechanisms in a model combustor M. Leyko SNECMA, 77550 Moissy-Cramayel, France - CERFACS, 3057 Toulouse, France F. Nicoud Université Montpellier II, 34095
More informationFor a long time, engine noise has been dominated by fan and jet noise. With their
Challenges in Combustion for Aerospace Propulsion M. Huet, F. Vuillot, N. Bertier (ONERA) M. Mazur, N. Kings, W. Tao, P. Scouflaire, F. Richecoeur, S. Ducruix (Laboratoire EM2C, CNRS, Centrale Supélec,
More informationDEVELOPMENT OF CFD MODEL FOR A SWIRL STABILIZED SPRAY COMBUSTOR
DRAFT Proceedings of ASME IMECE: International Mechanical Engineering Conference & Exposition Chicago, Illinois Nov. 5-10, 2006 IMECE2006-14867 DEVELOPMENT OF CFD MODEL FOR A SWIRL STABILIZED SPRAY COMBUSTOR
More informationRouen LBV 2012 ACCURACY OF TWO METHODS TO MEASURE LAMINAR FLAME SPEEDS: (1) STEADY BUNSEN BURNER FLAMES AND (2) SPHERICAL FLAMES IN BOMBS.
Rouen LBV 2012 ACCURACY OF TWO METHODS TO MEASURE LAMINAR FLAME SPEEDS: (1) STEADY BUNSEN BURNER FLAMES AND (2) SPHERICAL FLAMES IN BOMBS. A. Bonhomme, T. Boushaki*, L. Selle, B. Ferret and T. Poinsot
More informationAn analytical model for azimuthal thermo-acoustic modes in annular chamber fed by an annular plenum
An analytical model for azimuthal thermo-acoustic modes in annular chamber fed by an annular plenum M. Bauerheim a, J.-F. Parmentier a, P. Salas b, F. Nicoud c, T. Poinsot d a CERFACS, CFD team, 42 Av
More informationDirect numerical simulation of a turbulent reacting jet
Center for Turbulence Research Annual Research Briefs 999 59 Direct numerical simulation of a turbulent reacting jet By B. J. Boersma. Motivation and objectives Turbulent reacting jets are important in
More informationOpen Source Combustion Instability Low Order Simulator (OSCILOS Long) Technical report
Open Source Combustion Instability Low Order Simulator OSCILOS Long Technical report Introduction Jingxuan Li, Dong Yang, Charles Luzzato and Aimee S. Morgans Department of Mechanical Engineering, Imperial
More informationHybrid RANS/LES simulations of a cavitating flow in Venturi
Hybrid RANS/LES simulations of a cavitating flow in Venturi TSFP-8, 28-31 August 2013 - Poitiers - France Jean Decaix jean.decaix@hevs.ch University of Applied Sciences, Western Switzerland Eric Goncalves
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 informationTurbulent eddies in the RANS/LES transition region
Turbulent eddies in the RANS/LES transition region Ugo Piomelli Senthil Radhakrishnan Giuseppe De Prisco University of Maryland College Park, MD, USA Research sponsored by the ONR and AFOSR Outline Motivation
More informationVortex Induced Vibrations
Vortex Induced Vibrations By: Abhiroop Jayanthi Indian Institute of Technology, Delhi Some Questions! What is VIV? What are the details of a steady approach flow past a stationary cylinder? How and why
More informationCONTROL OF INSTABILITIES IN REACTIVE AND NON-REACTIVE FLOWS
CONTROL OF INSTABILITIES IN REACTIVE AND NON-REACTIVE FLOWS Ann R. Karagozian Department of Mechanical and Aerospace Engineering University of California Los Angeles Propulsion Applications of EPRL Experimental
More informationDEVELOPMENT OF A FLAME TRANSFER FUNCTION FRAMEWORK FOR TRANSVERSELY FORCED FLAMES. s f s L. Greek. Subscripts
Proceedings of the ASME Turbo Expo 013, Power for and, Sea, and Air GT013 June 3-7, 013, San Antonio, Texas, USA GT013-95900 DEVEOPMENT OF A FAME TRANSFER FUNCTION FRAMEWORK FOR TRANSVERSEY FORCED FAMES
More informationModeling the response of premixed flame transfer functions - Key elements and experimental proofs
5th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 9-12 January 212, Nashville, Tennessee AIAA 212-985 Modeling the response of premixed flame transfer functions
More informationFlow control. Flow Instability (and control) Vortex Instabilities
Flow control Flow Instability (and control) Tim Colonius CDS 101 Friday, Oct 15, 2004 Many control problems contain fluid systems as components. Dashpot in mass-spring-damper systems HVAC system that thermostat
More informationStudy of Instabilities on Laminar-Turbulent Transition in a 4 Lug-Bolt in a Confined Diffusion Flame
Proceedings of the 3 rd International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT 16) Ottawa, Canada May 2 3, 2016 Paper No. 115 Study of Instabilities on Laminar-Turbulent Transition in a
More informationWALL PRESSURE FLUCTUATIONS IN A TURBULENT BOUNDARY LAYER AFTER BLOWING OR SUCTION
WALL PRESSURE FLUCTUATIONS IN A TURBULENT BOUNDARY LAYER AFTER BLOWING OR SUCTION Joongnyon Kim, Kyoungyoun Kim, Hyung Jin Sung Department of Mechanical Engineering, Korea Advanced Institute of Science
More informationCOMBUSTION DYNAMICS LINKED TO FLAME BEHAVIOUR IN A PARTIALLY PREMIXED SWIRLED INDUSTRIAL BURNER
MCS 5 Monastir, Tunisia, September 9-13 27 COMBUSTION DYNAMICS LINKED TO FLAME BEHAVIOUR IN A PARTIALLY PREMIXED SWIRLED INDUSTRIAL BURNER Fernando Biagioli 1, Felix Güthe and Bruno Schuermans ALSTOM (Switzerland),
More informationExploring STAR-CCM+ Capabilities, Enhancements and Practices for Aerospace Combustion. Niveditha Krishnamoorthy CD-adapco
Exploring STAR-CCM+ Capabilities, Enhancements and Practices for Aerospace Combustion Niveditha Krishnamoorthy CD-adapco Outline Overview of modeling capability Applications, Practices and Enhancements
More informationSIMULATION OF PRECESSION IN AXISYMMETRIC SUDDEN EXPANSION FLOWS
Second International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 6-8 December 1999 SIMULATION OF PRECESSION IN AXISYMMETRIC SUDDEN EXPANSION FLOWS Baoyu GUO, Tim
More informationActive Control of Turbulence and Fluid- Structure Interactions
Bonjour! Active Control of Turbulence and Fluid- Structure Interactions Yu Zhou Institute for Turbulence-Noise-Vibration Interaction and Control Shenzhen Graduate School, Harbin Institute of Technology
More informationProceedings of Meetings on Acoustics
Proceedings of Meetings on Acoustics Volume 19, 2013 http://acousticalsociety.org/ ICA 2013 Montreal Montreal, Canada 2-7 June 2013 Engineering Acoustics Session 1pEAa: Active and Passive Control of Fan
More informationBasic Features of the Fluid Dynamics Simulation Software FrontFlow/Blue
11 Basic Features of the Fluid Dynamics Simulation Software FrontFlow/Blue Yang GUO*, Chisachi KATO** and Yoshinobu YAMADE*** 1 FrontFlow/Blue 1) is a general-purpose finite element program that calculates
More informationA NUMERICAL ANALYSIS OF COMBUSTION PROCESS IN AN AXISYMMETRIC COMBUSTION CHAMBER
SCIENTIFIC RESEARCH AND EDUCATION IN THE AIR FORCE-AFASES 2016 A NUMERICAL ANALYSIS OF COMBUSTION PROCESS IN AN AXISYMMETRIC COMBUSTION CHAMBER Alexandru DUMITRACHE*, Florin FRUNZULICA ** *Institute of
More informationelements remain in high frequency region and sometimes very large spike-shaped peaks appear. So we corrected the PIV time histories by peak cutting an
The Seventh International Colloquium on Bluff Body Aerodynamics and Applications (BBAA7) Shanghai, China; September 2-6, 2012 LES of fluctuating wind pressure on a 3D square cylinder for PIV-based inflow
More informationSchool of Aerospace Engineering. Course Outline
Course Outline A) Introduction and Outlook B) Flame Aerodynamics and Flashback C) Flame Stretch, Edge Flames, and Flame Stabilization Concepts D) Disturbance Propagation and Generation in Reacting Flows
More informationAnalysis of High-Frequency Thermoacoustic Instabilities in Lean- Premixed Gas Turbine Combustors
Analysis of High-Frequency Thermoacoustic Instabilities in Lean- Premixed Gas Turbine Combustors T. Hummel *1,2, P. Romero 1, F. Berger 1, M. Schulze 1, B. Schuermans 2,3 and T. Sattelmayer 1 1 Lehrstuhl
More informationA Ghost-fluid method for large-eddy simulations of premixed combustion in complex geometries
Center for Turbulence Research Annual Research Briefs 2005 269 A Ghost-fluid method for large-eddy simulations of premixed combustion in complex geometries By V. Moureau, P. Minot, C. Bérat AND H. Pitsch
More informationForcing of self-excited round jet diffusion flames
Forcing of self-excited round jet diffusion flames Matthew P. Juniper 1, Larry K. B. Li 1 and Joseph W. Nichols 2 1. Engineering Department, University of Cambridge, CB2 1TQ, United Kingdom 2. Laboratoire
More information