ANSYS Advanced Solutions for Gas Turbine Combustion. Gilles Eggenspieler 2011 ANSYS, Inc.
|
|
- Oliver Sutton
- 6 years ago
- Views:
Transcription
1 ANSYS Advanced Solutions for Gas Turbine Combustion Gilles Eggenspieler ANSYS, Inc. 1
2 Agenda Steady State: New and Existing Capabilities Reduced Order Combustion Models Finite-Rate Chemistry Models Chemistry Acceleration Methods Scale Resolving Simulation (SRS) Simulation LES and Scale Adaptive Embedded and Zonal LES 2 Innovative Combustion and Pollutant Models Thickened Flame Model G-Equation Model 2011 ANSYS, Inc. CO Pollutant Modeling
3 An ANSYS Solution for every Simulation Challenge High Quality Fuel/Air Mixing Advanced Turbulence Models (RANS, SAS, LES) Liquid Fuel Injection DPM tracking, Advanced Break-Up Models Complex Chemistry Complete Array of Turbulent Chemistry Models Emission Predictions Post-Processing and Coupled Pollutant Models Heat Transfer Computation Advanced Wall Functions and Turbulence Models Configuration Optimization Parametric Simulation, Design Exploration Lifing Fluid-Structure Interaction, ANSYS FEA, ncode 3
4 A complete Portfolio of Reduced Order Combustion Models Partially-Premixed Non-Premixed Combustion Premixed Combustion Combustion Progress Variable Mixture Fraction Chemistry Tabulation - Equilibrium Chemistry - Non-Equilibrium Flamelets Compressibility Effects Non-Adiabatic Systems + Flame Speed Models - Zimont Flame Speed - Peters Flame Speed Enhanced Coherent Flame Model Compressibility Effects Non-Adiabatic Systems Post-Processing Pollutant Models - NOx - SOx - Soot Steady and Unsteady Post-Processing 4 = Mixture FractionProgress Variable Approaches Chemistry Tabulation - Equilibrium Chemistry - Non-Equilibrium Flamelets Flame Speed Models - Zimont Flame Speed - Peters Flame Speed Compressibility Effects Non-Adiabatic Systems Decoupled Detailed Chemistry - Pollutant Finite-Rate Chemistry added on-top of the existing simulation - Pollutants and Minor Species only Steady and Unsteady PostProcessing
5 Finite-Rate Chemistry Models: An Extensive Offering Laminar Finite Rate (Chemistry Only) Eddy-Dissipation (Turbulence Only) Premixed Laminar Finite Rate/Eddy-Dissipation (Chemistry/Turbulence Interactions) Non-Premixed Eddy-Dissipation Concept (Chemistry/Turbulence Interactions) Partially Premixed Composition PDF Transport (Chemistry/Turbulence Interactions) Post-Processing Pollutant Models - NOx - SOx - Soot Steady and Unsteady Post-Processing R1 Decoupled Detailed Chemistry 3 - Pollutant Finite-Rate Chemistry added on-top of the existing simulation - Pollutants and Minor Species only Steady and Unsteady PostProcessing KEY TECHNOLOGY: CHEMISTRY ACCELERATION 5
6 Efficient Chemistry Acceleration Solution From 2 to 10 s of Species Minor Species and Radicals Challenge Chemistry Computation Cost >> Fluid Computation Cost Stiff Reaction Rates In-Situ Adaptive Tabulation (ISAT) Chemistry Agglomeration Dimension Reduction Decoupled Detailed Chemistry 6
7 Efficient Chemistry Acceleration IN-SITU ADAPTIVE TABULATION CHEMISTRY AGGLOMERATION Store Reaction Mappings in an ISAT table Agglomerate cells of similar Composition Retrieve Reaction rates when needed Call ISAT on Agglomerated Cells Up to 100 Speed-Up Factor DIMENSION REDUCTION User selects the transported Species Calculate the remaining unrepresented species using constrained chemical equilibrium Allows 50+ species in the full ANSYS, Inc. mechanism Map Reaction Step back to Original Cells DECOUPLED DETAILED CHEMISTRY Slow chemistry (pollutants) - NO - CO Compute Chemistry (Minor Species) on a frozen (Fluid/Major Species) Field
8 Accurate Emission Prediction: GE LM 1600 Challenge GE LM-1600 Non-Premixed/Air-natural Gas Prediction of NO Emission Annular combustion chamber 18 nozzles ANSYS Solution Geometry Mesh High Quality Mesh Laminar Flamelet model 22 species, 104 reactions reduced GRI-MECH 1.22 mechanism Differential diffusion included Temperature Results Accurate Prediction of the Combustion Processes Accurate Prediction of the NO (Pollutant) Emissions Courtesy of Nova Research and Technology Corp. 8 NO Predictions
9 Innovative Particle BreakUp Model - BETA New Advanced Droplet Models for Fuel Combustion - Accurate prediction of secondary droplet break-up - Particles characteristics and locations are essential for accurate simulation on of the combustion processes STOCHASTIC SECONDARY DROPLET (SSD) Break-Up - Valid for High Weber number particles - Break-Up modeled as a discrete random event - Break-Up Distribution of Diameter over a Range ASSUMPTIONS - The probability of break-up is independent of the parent droplet size - Secondary droplet size is sampled from an analytical solution of the Fokker-Planck equation for the probability distribution - Parameters for the size distribution are based on local conditions 9...
10 SSD: Accurate Break-Up Prediction Challenge Simulate accurate Jet Penetration Hiroyasu tests Accurate Droplet Break Up is Required ANSYS Solution Large-Eddy Simulation SSD Break-Up Model Results Accurate Prediction of the Jet Penetration at different operating Conditions 10 Visualization of the Droplets Jet Jet Penetration Results
11 The Need for Scale Resolving Models Next generation Combustion Simulations requires to capture unsteady Phenomena Prediction of Combustion Dynamics Prediction of Flame instabilities which can lead to catastrophic phenomena like BlowOff or Flashback Scale Resolving Models proved to be more accurate State of the Art Scale Resolving Models in ANSYS CFD 11 Scale Adaptive Simulation Detached-Eddy Simulation Delayed Detached-Eddy Simulation Embedded Large-Eddy Simulation Large-Eddy Simulation
12 State of the Art Scale Resoling Models U-RANS (Unsteady RANS) URANS gives unphysical single mode unsteady behavior LES (Large Eddy Simulation) Adequate only for non wall-bounded flows Too expensive for most industrial flows due to high resolution requirements in boundary layers U-RANS DES (Detached Eddy Simulation) First industrial-strength model for high-re with LES-content Increased complexity (grid sensitivity) due to explicit mix of two modeling concepts SAS (Scale-Adaptive Simulation) Extends URANS to many technical flows Provides LES -content in unsteady regions A preferred solution for Scale Resolving Simulations of Engineering applications 12 SAS
13 A fully Flexible Scale-Resolving Methods Portfolio Scale Resolving Simulations are computationally expensive To capture all relevant turbulent structures, the mesh resolution is finer than typical RANS meshes To capture all relevant turbulent structures, the time step is smaller than typical U-RANS time steps ANSYS Solution: Domain Based Scale Resolving Use 13 Use Scale Resolving Methods only in Area of interest Use typical U-RANS methods in area where the resolution of unsteady turbulent structure is not needed Zonal LES for ANSYS CFX Embedded LES for ANSYS FLUENT
14 Efficient Scale Resolving Simulation: Sydney Flame Example Challenge Simulating the J&R Flame using an Scale Resolving Method Reduce the computational costs of the Scale Resolving Simulation LES ANSYS Solution Use the Embedded LES Method Use LES in the area of interest: combustion region Use U-RANS in regions where LES cannot be used (swirler) Use U-RANS in regions where the LES cost is not justified (inflow pipe and outflow region) Results Results as accurate as a full LES Reduced Computational cost when compared to a full LES Simulation 14 U-RANS LES U-RANS
15 Scale Resolving Methods for Combustion Simulations: LES Example (GE LM6000) Challenge Simulating Combustion Processes in the GE LM6000 Gas Turbine Combustion Chamber Predict the Flame location and velocity fields ANSYS Solution High Quality Mesh State of the Art Turbulence Models (LES) State of the Art Combustion Models (Premixed Model) Results Accurate Prediction of the Combustion Processes Accurate Prediction of Velocity Fields 15
16 Scale Resolving Methods for Combustion Dynamics: SAS Example (Siemens Dual Fuel DLE) Challenge Simulating Combustion Processes in a Gas Turbine Combustion Chamber Predict the Combustion Dynamics ANSYS Solution High Quality Mesh Advanced Turbulence Models (SAS) Results Accurate Prediction of the Combustion Processes Accurate Prediction of the Acoustics Behavior of the system Prediction of Aerodynamic Frequencies in a Gas Turbine Combustor Using Transient CFD GT ANSYS, Inc. Double Skin Impingement Main Burner Cooled Combustor Pilot Burner PreChamber Radial Swirler
17 Newly Implemented Finite-Rate Unsteady Combustion Model: Thickened Flame Model In Unsteady Mode, the flame structure cannot be resolved on the computational mesh When using Finite Rate Chemistry, numerical issues (temperature spikes) can appear because of lack of Flame resolution When not resolving flame, flame speed is wrong Dynamic Thickening in the reaction zone Local Thickening Factor as a function of the mesh size ANSYS Solution: Thickened Flame Model The flame is dynamically thickened to to limit thickening to flame zone only An Efficiency Function takes into account the chemistry/turbulence Interactions 17 Flame/Turbulence Interaction: Accurate Flame Efficiency function Representation
18 Newly Implemented Premixed Unsteady Combustion Model: GEquation In Unsteady Mode, typical Premixed Model can predict a dissipative thick flame surface REACTANT PRODUCTS Affect accurate prediction of flame surface/turbulence interaction Degrades quality of the results G-Field: Distance from the flame (Here burnt region where G > 0) ANSYS Solution: G-Equation (Level Set) The distance from the flame front (G) is tracked the G-field is re-initialized at every iteration to ensure that in the entire domain it equals the (singed) distance to the flame front REACTANT PRODUCTS Thin Flame 18
19 Innovative Pollutant Model: - BETA Time-Scale Separation for CO For typical Lean and Premixed or Partially Premixed Gas Turbine Combustion Chambers: Highly non-monotonous evolution of CO Fast formation of CO at the flame front Sharp CO peak in the reaction zone Relatively slow post-flame oxidation 0.15 Y(CH4) Y(CO) Y(CO2) 0.10 Y, 0.05 CO formation at the flame front x, m Oxidation CO CO2 DYCO front ρ = ρyco st c + c S CO + Diffusion Dt Time-Scale Separation Solution Separates Flame Front Formation from Post-Flame Oxidation Data extracted from PDF Chemistry Tables Peak CO at the Flame Front Post-Flame CO Oxidation Rates
20 Demonstration of the CO SST Capabilities Challenge Simulating CO formation and Oxidation in a Typical Gas Turbine Combustion Chamber ANSYS Solution High Quality Mesh (2.5 M nodes) Advanced Turbulence Model (SST) Advanced CO Models (TST) Geometry Results Fast Simulation CO Predictions are in agreement with Experimental Results CFD Prediction of Partload CO Emissions using a Two-Timescale Combustion Model - GT ANSYS, Inc. Accurate Boundary Conditions Comparison with Experimental Data
21 The Full Power of ANSYS Workbench: Optimization, FSI, etc. ANSYS Mechanical Gas temperature 1-way coupling wall temperature ANSYS CFD Design Optimization Examples: Total deformation Equivalent elastic strain ANSYS Workbench Fluid Structure Interaction (FSI) Couples CFD and Structural Simulations Transfer Pressure Loads, Temperature Loads, CHT data, etc. 1- and 2-way FSI 21 Optimize a geometry Optimize operating conditions
22 Realize Your Product Promise Questions? 22
Best 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 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 informationA comparison between two different Flamelet reduced order manifolds for non-premixed turbulent flames
8 th U. S. National Combustion Meeting Organized by the Western States Section of the Combustion Institute and hosted by the University of Utah May 19-22, 2013 A comparison between two different Flamelet
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 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 informationReacting Flow Modeling in STAR-CCM+ Rajesh Rawat
Reacting Flow Modeling in STAR-CCM+ Rajesh Rawat Latest Additions (v 7.02/v 7.04) Eulerian Multi-phase Reaction Model Soot Model Moment Methods PPDF Flamelet Multi-stream model Complex Chemistry Model
More informationPredicting NO Formation with Flamelet Generated Manifolds
Predicting NO Formation with Flamelet Generated Manifolds J. A. van Oijen and L. P. H. de Goey Dept. Mechanical Engineering, Technische Universiteit Eindhoven P.O. Box, 6 MB Eindhoven, The Netherlands
More informationThermal NO Predictions in Glass Furnaces: A Subgrid Scale Validation Study
Feb 12 th 2004 Thermal NO Predictions in Glass Furnaces: A Subgrid Scale Validation Study Padmabhushana R. Desam & Prof. Philip J. Smith CRSIM, University of Utah Salt lake city, UT-84112 18 th Annual
More informationIntroduction Flares: safe burning of waste hydrocarbons Oilfields, refinery, LNG Pollutants: NO x, CO 2, CO, unburned hydrocarbons, greenhouse gases G
School of Process, Environmental and Materials Engineering Computational study of combustion in flares: structure and emission of a jet flame in turbulent cross-flow GERG Academic Network Event Brussels
More informationEvaluation of Liquid Fuel Spray Models for Hybrid RANS/LES and DLES Prediction of Turbulent Reactive Flows
Evaluation of Liquid Fuel Spray Models for Hybrid RANS/LES and DLES Prediction of Turbulent Reactive Flows by Ali Afshar A thesis submitted in conformity with the requirements for the degree of Masters
More informationAdvanced Turbulence Models for Emission Modeling in Gas Combustion
1 Advanced Turbulence Models for Emission Modeling in Gas Combustion Ville Tossavainen, Satu Palonen & Antti Oksanen Tampere University of Technology Funding: Tekes, Metso Power Oy, Andritz Oy, Vattenfall
More informationMUSCLES. Presented by: Frank Wetze University of Karlsruhe (TH) - EBI / VB month review, 21 September 2004, Karlsruhe
MUSCLES Modelling of UnSteady Combustion in Low Emission Systems G4RD-CT-2002-00644 R&T project within the 5 th Framework program of the European Union: 1 Numerical computations of reacting flow field
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 informationLarge-eddy simulation of an industrial furnace with a cross-flow-jet combustion system
Center for Turbulence Research Annual Research Briefs 2007 231 Large-eddy simulation of an industrial furnace with a cross-flow-jet combustion system By L. Wang AND H. Pitsch 1. Motivation and objectives
More informationLES Investigation of Fuel Effects on Lean Blow off (LBO) for a Realistic Two-Phase Flow Combustor
LES Investigation of Fuel Effects on Lean Blow off (LBO) for a Realistic Two-Phase Flow Combustor J.W. LABAHN, P. C. M A, L. E SCLAPE, M. I HME S TANFORD U NIVERSITY 2017 SIAM International Conference
More informationXXXVIII 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 informationTOPICAL PROBLEMS OF FLUID MECHANICS 97
TOPICAL PROBLEMS OF FLUID MECHANICS 97 DOI: http://dx.doi.org/10.14311/tpfm.2016.014 DESIGN OF COMBUSTION CHAMBER FOR FLAME FRONT VISUALISATION AND FIRST NUMERICAL SIMULATION J. Kouba, J. Novotný, J. Nožička
More informationMULTIPHASE FLOW MODELLING
MULTIPHASE FLOW MODELLING 1 Introduction 2 Outline Multiphase Flow Modeling Discrete phase model Eulerian model Mixture model Volume-of-fluid model Reacting Flow Modeling Eddy dissipation model Non-premixed,
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 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 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 informationAn Unsteady/Flamelet Progress Variable Method for LES of Nonpremixed Turbulent Combustion
43rd AIAA Aerospace Sciences Meeting and Exhibit, -3 Jan 25, Reno, NV An Unsteady/Flamelet Progress Variable Method for LES of Nonpremixed Turbulent Combustion Heinz Pitsch and Matthias Ihme Stanford University,
More informationMUSCLES. Presented by: Frank Wetzel University of Karlsruhe (TH) - EBI / VBT month review, 3 December 2003, IST, Lisbon
MUSCLES Modelling of UnSteady Combustion in Low Emission Systems G4RD-CT-2002-00644 R&T project within the 5 th Framework program of the European Union: 1 Numerical computations of isothermal flow and
More informationDetailed Numerical Simulation of Liquid Jet in Cross Flow Atomization: Impact of Nozzle Geometry and Boundary Condition
ILASS-Americas 25th Annual Conference on Liquid Atomization and Spray Systems, Pittsburgh, PA, May 23 Detailed Numerical Simulation of Liquid Jet in Cross Flow Atomization: Impact of Nozzle Geometry and
More informationConstruction of Libraries for Non-Premixed Tabulated Chemistry Combustion Models including Non-Adiabatic Behaviour due to Wall Heat Losses
Sonderforschungsbereich/Transregio 40 Annual Report 2016 193 Construction of Libraries for Non-Premixed Tabulated Chemistry Combustion Models including Non-Adiabatic Behaviour due to Wall Heat Losses By
More informationNumerical Investigation of Ignition Delay in Methane-Air Mixtures using Conditional Moment Closure
21 st ICDERS July 23-27, 27 Poitiers, France Numerical Investigation of Ignition Delay in Methane-Air Mixtures using Conditional Moment Closure Ahmad S. El Sayed, Cécile B. Devaud Department of Mechanical
More informationINTERNAL FLOW IN A Y-JET ATOMISER ---NUMERICAL MODELLING---
ILASS-Europe 2002 Zaragoza 9 11 September 2002 INTERNAL FLOW IN A Y-JET ATOMISER ---NUMERICAL MODELLING--- Z. Tapia, A. Chávez e-mail: ztapia@imp.mx Instituto Mexicano del Petróleo Blvd. Adolfo Ruiz Cortines
More informationEVALUATION OF FOUR TURBULENCE MODELS IN THE INTERACTION OF MULTI BURNERS SWIRLING FLOWS
EVALUATION OF FOUR TURBULENCE MODELS IN THE INTERACTION OF MULTI BURNERS SWIRLING FLOWS A Aroussi, S Kucukgokoglan, S.J.Pickering, M.Menacer School of Mechanical, Materials, Manufacturing Engineering and
More informationDARS Digital Analysis of Reactive Systems
DARS Digital Analysis of Reactive Systems Introduction DARS is a complex chemical reaction analysis system, developed by DigAnaRS. Our latest version, DARS V2.0, was released in September 2008 and new
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 informationTutorial: Premixed Flow in a Conical Chamber using the Finite-Rate Chemistry Model
Tutorial: Premixed Flow in a Conical Chamber using the Finite-Rate Chemistry Model Introduction The purpose of this tutorial is to provide guidelines and recommendations for setting up and solving the
More informationD. VEYNANTE. Introduction à la Combustion Turbulente. Dimanche 30 Mai 2010, 09h00 10h30
D. VEYNANTE Introduction à la Combustion Turbulente Dimanche 30 Mai 2010, 09h00 10h30 Introduction to turbulent combustion D. Veynante Laboratoire E.M2.C. CNRS - Ecole Centrale Paris Châtenay-Malabry France
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 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 informationHIGH-FIDELITY MODELS FOR COAL COMBUSTION: TOWARD HIGH-TEMPERATURE OXY-COAL FOR DIRECT POWER EXTRACTION
1 HIGH-FIDELITY MODELS FOR COAL COMBUSTION: TOWARD HIGH-TEMPERATURE OXY-COAL FOR DIRECT POWER EXTRACTION XINYU ZHAO UNIVERSITY OF CONNECTICUT DANIEL C. HAWORTH 1, MICHAEL F. MODEST 2, JIAN CAI 3 1 THE
More informationExercises in Combustion Technology
Exercises in Combustion Technology Exercise 4: Turbulent Premixed Flames Turbulent Flow: Task 1: Estimation of Turbulence Quantities Borghi-Peters diagram for premixed combustion Task 2: Derivation of
More informationOMAE FLUID-STRUCTURE INTERACTION MODELING OF SUBSEA JUMPER PIPE
Proceedings of the ASME 2014 33 rd International Conference on Ocean, Offshore and Arctic Engineering OMAE2014 June 8-13, 2014, San Francisco, CA USA OMAE2014-24070 FLUID-STRUCTURE INTERACTION MODELING
More informationNumerical Investigations of a Hydrogen Jet Flame in a Vitiated
Numerical Investigations of a Hydrogen Jet Flame in a Vitiated Coflow by Donald Jerome Frederick A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy
More informationSteady Laminar Flamelet Modeling for turbulent non-premixed Combustion in LES and RANS Simulations
Sonderforschungsbereich/Transregio 4 Annual Report 213 139 Steady Laminar Flamelet Modeling for turbulent non-premixed Combustion in LES and RANS Simulations By H. Müller, C. A. Niedermeier, M. Pfitzner
More informationModeling of Wall Heat Transfer and Flame/Wall Interaction A Flamelet Model with Heat-Loss Effects
9 th U. S. National Combustion Meeting Organized by the Central States Section of the Combustion Institute May 17-20, 2015 Cincinnati, Ohio Modeling of Wall Heat Transfer and Flame/Wall Interaction A Flamelet
More informationTowards regime identification and appropriate chemistry tabulation for computation of autoigniting turbulent reacting flows
Center for Turbulence Research Annual Research Briefs 009 199 Towards regime identification and appropriate chemistry tabulation for computation of autoigniting turbulent reacting flows By M. Kostka, E.
More informationRANS-SLFM and LES-SLFM numerical simulations of turbulent non-premixed oxy-fuel jet flames using CO2/O2 mixture
Graduate Theses and Dissertations Iowa State University Capstones, Theses and Dissertations 217 RANS-SLFM and LES-SLFM numerical simulations of turbulent non-premixed oxy-fuel jet flames using CO2/O2 mixture
More informationFlame / wall interaction and maximum wall heat fluxes in diffusion burners
Flame / wall interaction and maximum wall heat fluxes in diffusion burners de Lataillade A. 1, Dabireau F. 1, Cuenot B. 1 and Poinsot T. 1 2 June 5, 2002 1 CERFACS 42 Avenue Coriolis 31057 TOULOUSE CEDEX
More informationThe effect of momentum flux ratio and turbulence model on the numerical prediction of atomization characteristics of air assisted liquid jets
ILASS Americas, 26 th Annual Conference on Liquid Atomization and Spray Systems, Portland, OR, May 204 The effect of momentum flux ratio and turbulence model on the numerical prediction of atomization
More informationNO x Emissions Prediction from a Turbulent Diffusion Flame
NO x Emissions Prediction from a Turbulent Diffusion Flame Akpan, Patrick 1 and Njiofor, Tobenna 2 1 Department of Mechanical Engineering, University of Nigeria, Nsukka 2 Process Systems Engineering, Cranfield
More informationTopics in Other Lectures Droplet Groups and Array Instability of Injected Liquid Liquid Fuel-Films
Lecture Topics Transient Droplet Vaporization Convective Vaporization Liquid Circulation Transcritical Thermodynamics Droplet Drag and Motion Spray Computations Turbulence Effects Topics in Other Lectures
More informationA first investigation on using a species reaction mechanism for flame propagation and soot emissions in CFD of SI engines
A first investigation on using a 1000+ species reaction mechanism for flame propagation and soot emissions in CFD of SI engines F.A. Tap *, D. Goryntsev, C. Meijer, A. Starikov Dacolt International BV
More informationOverview of Reacting Flow
Overview of Reacting Flow Outline Various Applications Overview of available reacting flow models Latest additions Example Cases Summary Reacting Flows Applications in STAR-CCM+ Chemical Process Industry
More informationCombustion and Emission Modeling in CONVERGE with LOGE models
Combustion and Emission Modeling in CONVERGE with LOGE models Corinna Netzer, Harry Lehtiniemi and Fabian Mauss 2015 CONVERGE USER CONFERENCE RICHARD CHILDRESS RACING, WELCOME, NC Outline Objective LOGE
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 informationDirect Soot Formation
Direct Soot Formation Claus Wahl 14 th ET Conference on Combustion Generated Particles August 1 st 4 th, 2010 Deutsches Zentrum für Luft und Raumfahrt. (DLR-Stuttgart) Mailing address DLR-VT Pfaffenwaldring
More informationMathematical Modelling of Health & Safety Related Flows Future Direction
Mathematical Modelling of Health & Safety Related Flows Future Direction Stefan Ledin Health & Safety Laboratory, UK www.hsl.gov.uk www.hsl.gov.uk Content Where is modelling used? Real Life Scenarios Flows
More informationNumerical Modeling of Anode Baking Process with COMSOL Multiphysics
Numerical Modeling of Anode Baking Process with COMSOL Multiphysics P. Nakate 1,2, W. Voogd de 3, D.J.P. Lahaye 1, C. Vuik 1, M. Talice 4 1. Department of applied mathematics, Delft University of technology,
More informationNumerical Simulation of Entropy Generation in Hydrogen Enriched Swirl Stabilized Combustion
Saqr & Wahid CFD Letters Vol. 5(1) 13 www.cfdl.issres.net Vol. 5 (1) March 13 Numerical Simulation of Entropy Generation in Hydrogen Enriched Swirl Stabilized Combustion Khalid M. Saqr 1,* and Mazlan A.
More informationDetailed Chemical Kinetics in Multidimensional CFD Using Storage/Retrieval Algorithms
13 th International Multidimensional Engine Modeling User's Group Meeting, Detroit, MI (2 March 23) Detailed Chemical Kinetics in Multidimensional CFD Using Storage/Retrieval Algorithms D.C. Haworth, L.
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 informationSoot formation in turbulent non premixed flames
Soot formation in turbulent non premixed flames A. Cuoci 1, A. Frassoldati 1, D. Patriarca 1, T. Faravelli 1, E. Ranzi 1, H. Bockhorn 2 1 Dipartimento di Chimica, Materiali e Ing. Chimica, Politecnico
More informationDNS and LES of Turbulent Combustion
Computational Fluid Dynamics In Chemical Reaction Engineering IV June 19-24, 2005 Barga, Italy DNS and LES of Turbulent Combustion Luc Vervisch INSA de Rouen, IUF, CORIA-CNRS Pascale Domingo, Julien Réveillon
More informationCFD and Kinetic Analysis of Bluff Body Stabilized Flame
CFD and Kinetic Analysis of Bluff Body Stabilized ame A. Dicorato, E. Covelli, A. Frassoldati, T. Faravelli, E. Ranzi Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, ITALY
More informationDepartment of Mechanical Engineering BM 7103 FUELS AND COMBUSTION QUESTION BANK UNIT-1-FUELS
Department of Mechanical Engineering BM 7103 FUELS AND COMBUSTION QUESTION BANK UNIT-1-FUELS 1. Define the term fuels. 2. What are fossil fuels? Give examples. 3. Define primary fuels. Give examples. 4.
More informationUrea Injection and Preparation in Diesel Applications Multiphase Multicomponent Modeling using Star-CD
, London Urea Injection and Preparation in Diesel Applications Multiphase Multicomponent Modeling using Star-CD Institute for Powertrains & Automotive Technology Dipl.-Phys. Simon Fischer Dr. Thomas Lauer
More informationSimulation of soot formation and analysis of the "Advanced soot model" parameters in an internal combustion engine
Simulation of soot formation and analysis of the "Advanced soot model" parameters in an internal combustion engine Marko Ban, dipl. ing.* Power Engineering Department Faculty of Mechanical Engineering
More informationReactive Flows using TransAT. June 2013 Jan van Rickenbach, Daniel Rakotonirina ASCOMP
Reactive Flows using TransAT June 2013 Jan van Rickenbach, Daniel Rakotonirina ASCOMP www.ascomp.ch jan@ascomp.ch Model portfolio Reactive flows Infinitely Fast Chemistry (non-premixed) EDC EDC-SDT (Scalar
More informationTurbulent Premixed Combustion
Turbulent Premixed Combustion Combustion Summer School 2018 Prof. Dr.-Ing. Heinz Pitsch Example: LES of a stationary gas turbine velocity field flame 2 Course Overview Part II: Turbulent Combustion Turbulence
More informationDevelopment of Reduced Chemistry for Efficient Combustion Simulations
University of Connecticut DigitalCommons@UConn Master's Theses University of Connecticut Graduate School 4-13-2016 Development of Reduced Chemistry for Efficient Combustion Simulations Yufeng Liu yufengliu812@gmail.com
More informationNUMERICAL ANALYSIS OF TURBULENT FLAME IN AN ENCLOSED CHAMBER
NUMERICAL ANALYSIS OF TURBULENT FLAME IN AN ENCLOSED CHAMBER Naveen Kumar D 1*, Pradeep R 2 and Bhaktavatsala H R 3 1 Assistant Professor Department of Mechanical Engineering, M S Engineering College,
More informationLOW TEMPERATURE MODEL FOR PREMIXED METHANE FLAME COMBUSTION
ISTP-16, 2005, PRAGUE 16TH INTERNATIONAL SYMPOSIUM ON TRANSPORT PHENOMENA LOW TEMPERATURE MODEL FOR PREMIXED METHANE FLAME MBUSTION M. Forman, J.B.W.Kok,M. Jicha Department of Thermodynamics and Environmental
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 informationCFD and Thermal Stress Analysis of Helium-Cooled Divertor Concepts
CFD and Thermal Stress Analysis of Helium-Cooled Divertor Concepts Presented by: X.R. Wang Contributors: R. Raffray and S. Malang University of California, San Diego ARIES-TNS Meeting Georgia Institute
More informationCST Investigation on High Speed Liquid Jet using Computational Fluid Dynamics Technique
The 23 rd Conference of the Mechanical Engineering Network of Thailand November 4 7, 2009, Chiang Mai Investigation on High Speed Liquid Jet using Computational Fluid Dynamics Technique Wirapan Seehanam*,
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 informationThere are no simple turbulent flows
Turbulence 1 There are no simple turbulent flows Turbulent boundary layer: Instantaneous velocity field (snapshot) Ref: Prof. M. Gad-el-Hak, University of Notre Dame Prediction of turbulent flows standard
More informationEfficient Engine CFD with Detailed Chemistry
www.cd-adapco.com Efficient Engine CFD with Detailed Chemistry Harry Lehtiniemi and Rajesh Rawat CD-adapco Karin Fröjd and Fabian Mauss Digital Analysis of Reaction Systems Challenges in CFD engine modeling
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 informationRESOLVING TURBULENCE- CHEMISTRY INTERACTIONS IN MIXING-CONTROLLED COMBUSTION WITH LES AND DETAILED CHEMISTRY
RESOLVING TURBULENCE- CHEMISTRY INTERACTIONS IN MIXING-CONTROLLED COMBUSTION WITH LES AND DETAILED CHEMISTRY Convergent Science White Paper COPYRIGHT 218 CONVERGENT SCIENCE. All rights reserved. OVERVIEW
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 informationComputer Fluid Dynamics E181107
Computer Fluid Dynamics E181107 2181106 Combustion, multiphase flows Remark: foils with black background could be skipped, they are aimed to the more advanced courses Rudolf Žitný, Ústav procesní a zpracovatelské
More informationProcess Chemistry Toolbox - Mixing
Process Chemistry Toolbox - Mixing Industrial diffusion flames are turbulent Laminar Turbulent 3 T s of combustion Time Temperature Turbulence Visualization of Laminar and Turbulent flow http://www.youtube.com/watch?v=kqqtob30jws
More informationCFD Study of NO x Emissions in a Model Commercial Aircraft Engine Combustor
Chinese Journal of Aeronautics 25 (2012) 854-863 Contents lists available at ScienceDirect Chinese Journal of Aeronautics journal homepage: www.elsevier.com/locate/cja CFD Study of NO x Emissions in a
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 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 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 informationLecture 9 Laminar Diffusion Flame Configurations
Lecture 9 Laminar Diffusion Flame Configurations 9.-1 Different Flame Geometries and Single Droplet Burning Solutions for the velocities and the mixture fraction fields for some typical laminar flame configurations.
More informationA validation study of the flamelet approach s ability to predict flame structure when fluid mechanics are fully resolved
Center for Turbulence Research Annual Research Briefs 2009 185 A validation study of the flamelet approach s ability to predict flame structure when fluid mechanics are fully resolved By E. Knudsen AND
More informationModeling flame brush thickness in premixed turbulent combustion
Center for Turbulence Research Proceedings of the Summer Program 2006 299 Modeling flame brush thickness in premixed turbulent combustion By E. Knudsen, O. Kurenkov, S. Kim, M. Oberlack AND H. Pitsch Turbulent
More informationDr.-Ing. Frank Beyrau Content of Lecture
Content of Lecture 1. Phenomenology of Combustion 2. Thermodynamic Fundamentals 3. Chemical Reaction Kinetics 4. Ignition and Ignition Limits 5. Laminar Flame Theory 6. Turbulent Combustion 7. Pollutants
More informationPremixed MILD Combustion of Propane in a Cylindrical. Furnace with a Single Jet Burner: Combustion and. Emission Characteristics
Premixed MILD Combustion of Propane in a Cylindrical Furnace with a Single Jet Burner: Combustion and Emission Characteristics Kin-Pang Cheong a, c, Guochang Wang a, Jianchun Mi a*, Bo Wang a, Rong Zhu
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 informationSimulation of Turbulent Lifted Flames and their Transient Propagation
25 th ICDERS August 2-7th, 2015 Leeds, UK Simulation of Turbulent Lifted Flames and their Transient Propagation S. Ruan, Z. Chen, N. Swaminathan University of Cambridge Cambridge, UK 1 Introduction Turbulent
More information2D Direct Numerical Simulation of methane/air turbulent premixed flames under high turbulence intensity Julien Savre 04/13/2011
1 2D Direct Numerical Simulation of methane/air turbulent premixed flames under high turbulence intensity Julien Savre 04/13/2011 2 Outline Why studying turbulent premixed flames under high turbulent intensity?
More informationUniversity of Maiduguri Faculty of Engineering Seminar Series Volume 6, december Seminar Series Volume 6, 2015 Page 58
University of Maiduguri Faculty of Engineering Seminar Series Volume 6, december 2015 IMPINGEMENT JET COOLING OF GAS TURBINE COMBUSTOR WALL OF HEAT FLUX IMPOSED HOT - SIDE: CONJUGATE HEAT TRANSFER INVESTIGATIONS
More informationOn the transient modelling of impinging jets heat transfer. A practical approach
Turbulence, Heat and Mass Transfer 7 2012 Begell House, Inc. On the transient modelling of impinging jets heat transfer. A practical approach M. Bovo 1,2 and L. Davidson 1 1 Dept. of Applied Mechanics,
More informationA Systematic Investigation of In Situ Adaptive. Tabulation for Combustion Chemistry. Liuyan Lu, Stephen B. Pope
A Systematic Investigation of In Situ Adaptive Tabulation for Combustion Chemistry Liuyan Lu, Stephen B. Pope FDA 7- October 7 Abstract A systematic up-to-date investigation of different implementations
More informationLARGE-EDDY SIMULATION OF PARTIALLY PREMIXED TURBULENT COMBUSTION
LARGE-EDDY SIMULATION OF PARTIALLY PREMIXED TURBULENT COMBUSTION Heinz Pitsch Mechanical Engineering Department Stanford University Stanford, CA 94305, USA h.pitsch@stanford.edu ABSTRACT The development
More informationLarge eddy simulation of hydrogen-air propagating flames
Loughborough University Institutional Repository Large eddy simulation of hydrogen-air propagating flames This item was submitted to Loughborough University's Institutional Repository by the/an author.
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 informationSimulating the combustion of gaseous fuels 6th OpenFoam Workshop Training Session. Dominik Christ
Simulating the combustion of gaseous fuels 6th OpenFoam Workshop Training Session Dominik Christ This presentation shows how to use OpenFoam to simulate gas phase combustion Overview Theory Tutorial case
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 informationLarge-Eddy Simulation of Turbulent Combustion
Annu. Rev. Fluid Mech. 2006. 38:453 82 The Annual Review of Fluid Mechanics is online at fluid.annualreviews.org doi: 10.1146/annurev.fluid. 38.050304.092133 Copyright c 2006 by Annual Reviews. All rights
More information