Introduction Flares: safe burning of waste hydrocarbons Oilfields, refinery, LNG Pollutants: NO x, CO 2, CO, unburned hydrocarbons, greenhouse gases G
|
|
- Godwin Ramsey
- 5 years ago
- Views:
Transcription
1 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 3-4 June 2010 Shariff Lawal, M. Fairweather, D. Ingham L. Ma, M. Pourkashanian and A. Williams
2 Introduction Flares: safe burning of waste hydrocarbons Oilfields, refinery, LNG Pollutants: NO x, CO 2, CO, unburned hydrocarbons, greenhouse gases Global flaring >100 billion m 3 /year Operating conditions have significant effect on flare flame stability, efficiency and emissions Important to predict this effect to control emissions (stringent regulation / taxes ) Solution gas flare on an off-shore oil production platform
3 Motivation Accurate emission measurement: Unresolved in large-scale flares Passive Fourier-transform infra-red spectroscopy failed validation testing 1 Experiment /Computational fluid dynamics (CFD) Few CFD study on emissions pattern from high momentum jet flares Challenging aspect of flares CFD : (3-D, turbulence, complex chemistry, unsteadiness, partial-premixing e.t.c.) 1. TCEQ PFTIR I Testing Report, URS(2004): Elevated refinery flare (source: John Zink CO. U.S.A)
4 Research Objectives Identify range of fuel jet and wind velocities for sustainable operations (refinery and oil-field flares) Investigate effect of: fuel jet and cross-flow velocities Improved prediction of important physical phenomenon (turbulence, unsteadiness, partial-premixing and coherent structures) Study unresolved issues associated with scaling from small-scale to industrialscale flares: minimum burner diameter appropriate dimensionless parameter
5 CFD Validation study Laboratory-scale, high jet momentum flares 2 ( Bandaru and Turns (2000)) Computational domain: 1.67 x 0.68 x 0.34m 3 ; burner diam.: 4.12 and 5.54 mm X Boundary conditions: Inlet, outflow, walls and symmetry Flow conditions: Fuel: pure methane u j = m/s, u cf = 2.3 and 5.0 m/s Re cf = 103, , m Jet flow (CH 4 ) Y 0.17 m Cross-flow (Air) Schematic of the Jet flame in cross-flow (JFICF) Z 2. Bandaru, R.V. and Turns, S.R. (2000). Combustion and Flame, 121,
6 Mathematical models Reynolds average Nervier-Stokes (RANS) transport equations for: continuity, momentum, enthalpy, mixture fraction/variance Turbulence: realizable and model with buoyancy Radiation: discrete ordinate method Soot : Brookes and Moss (1990) Combustion: steady / unsteady flamelet model (Peters, 1986) Multiple flamelet profile, scalar dissipation rate (SDR) ranges: /s; /s Reaction mechanism: GRI Mech. 3.0 Fluent 12.0 code κ ε
7 Results Temperature profile (K) (a) X=0.3 m Mean flame temperature(k) on symmetric plane. (a) Contours, (b) Radial profile at axial location, x = 0.3 m 3. Birch, A.D., Brown, D.R., Fairweather, M., and Hargrave, G.K. (1989). Combust. Sci. and Tech., 66,
8 Results Flame length M = ρ u ρ u 2 2 j j cf cf Curvilinear distance from the pipe exit to the flame tip (1200 K) Longer flame at low and high M M =336, u cf /u j = 0.04 Increase in M cause decrease and increase in flame length Trend of flame length with M is similar Varying jet exit velocity Varying cross-flow velocity Momentum ratio, M Predicted and measured flame length at different momentum ratios.
9 Results Flame length Increase in flame height due to lower effect of cross-flow on fuel jet Reduce interaction, mixing and air entrainment (a) (b) (c) Mean flame temperature contour on the symmetric plane for: (a) M = 332, (b) M = 192, and (c) M = 116
10 Results Flame length M = ρ u ρ u 2 2 j j cf cf Curvilinear distance from the pipe exit to the flame tip (1200 K) Longer flame at low and high M M =336, u cf /u j = 0.04 Increase in M cause decrease and increase in flame length Trend of flame length with M is similar Varying jet exit velocity Varying cross-flow velocity Momentum ratio, M Predicted and measured flame length at different momentum ratios.
11 Results Radiant fraction Peak radiant heat flux with soot higher by only 2.2% Lower radiant fraction at high M Trend correlate with decrease in flame volume and residence time due to higher Reynolds number Radiant fraction (%) Momentum flux ratio, M Predicted radiant fractions at different momentum flux ratios
12 Results Emission index (NO x ) Emission index quantity of pollutant in g per kg of fuel burned 4.5 Measured(Bandaru and Turns, 2000) sdr= sdr = 0.01 Higher EINO x at low momentum ratio No significant changes in EINO x with increase in M Improved species prediction for model with small SDR EINOx(g/Kg) Momentum ratio, M Predicted and measured NOx emission index at different momentum ratios.
13 Computational details Results Emission index (CO) Much higher effect of small SDR on CO emission index (EICO) CO emission index higher at high M No significant changes in EICO with increase in M Inconsistency in CO prediction possibly due to formation of coherent structures not resolved by RANS turbulence model EICO(g/Kg) Measured(Bandaru and Turns, 2000) sdr= sdr= Momentum ratio,m Predicted and measured CO emission index at different momentum ratios.
14 Computational details Results NO 2 /NO x ratio NO 2 in flames depicted by brownyellowish colouration in fumes NO 2 /NO x trend similar to CO species NO 2 /NO x ratio increases slightly at higher M NO 2 //NO x No significant changes in NO 2 /NO x with increase in M Can same conclusion be made for large-scale flares? Momentum ratio, M Predicted and measured NO 2 /NO x ratio at different momentum ratios.
15 Current work Large-scale industrial flare modelling (CANMET Flare test Facility, Ottawa, Canada) : Computational domain: 1.83 x 1.2 x 8.3 m 3, burner diameters: 2 to 6 Fuel: pure CH 4 and mixture of CH 4 and N 2 Range of jet / wind velocities: 0.23 to 22 ms -1 / 2.0 to 8.5 ms -1 Low momentum flux ratios: 0.2 < M < 15 Second-order turbulence closure resolves secondary flow features Unsteadiness RANS resolves unsteady mean flow structures Preliminary results
16 Current work preliminary results Unsteady calculation necessary for buoyancy dominated flow regime (a) RSM Reynolds stress turbulence model improved prediction of velocity field and turbulence kinetic energy Better prediction of recirculation region and flame temperature (b) SKE SKE Similar prediction for the species? (inconclusive: work-in-progress) Comparison of predicted temperature profile: (a) Reynolds stress (b) standard κ ε turbulence model
17 Conclusion Longer flame in the high and low momentum ratio regime Lower radiant heat flux and NO x at high momentum ratio Higher CO and NO 2 /NO x ratio at high M, no significant increase as M increases Flare operation is more likely acceptable at high momentum ratio ranges Unsteady calculation important in large-scale buoyancy dominated flares Future Work Improved accuracy of emission prediction through advance turbulence (LES) and combustion models (transported PDF )
18 Acknowledgement Nigerian Government funding for PhD research through the PTDF overseas scholarship scheme
19
Thermal 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 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 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 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 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 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 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 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 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 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 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 informationA Unified 3D CFD Model for Jet and Pool Fires
A Unified 3D CFD Model for Jet and Pool Fires Chenthil Kumar K. 1, Anil Kumar K. R. 1 and Amita Tripathi 2 1 Fluidyn Consultancy (P) Ltd, 146, Ring Road, 5, HSR Layout, Bangalore - 560102, India 2 Fluidyn
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 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 informationA G-equation formulation for large-eddy simulation of premixed turbulent combustion
Center for Turbulence Research Annual Research Briefs 2002 3 A G-equation formulation for large-eddy simulation of premixed turbulent combustion By H. Pitsch 1. Motivation and objectives Premixed turbulent
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 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 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 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 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 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 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 informationFluid Dynamics and Balance Equations for Reacting Flows
Fluid Dynamics and Balance Equations for Reacting Flows Combustion Summer School 2018 Prof. Dr.-Ing. Heinz Pitsch Balance Equations Basics: equations of continuum mechanics balance equations for mass and
More informationExperimental Study on the Non-reacting Flowfield of a Low Swirl Burner
Experimental Study on the Non-reacting Flowfield of a Low Swirl Burner Hang Yin & Ren Dai School of Energy and Powering Engineering, University of Shanghai for Science and Technology Box 25, 516# Jungong
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 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 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 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 informationIMPROVED POLLUTANT PREDICTIONS IN LARGE-EDDY SIMULATIONS OF TURBULENT NON-PREMIXED COMBUSTION BY CONSIDERING SCALAR DISSIPATION RATE FLUCTUATIONS
Proceedings of the Combustion Institute, Volume 9, 00/pp. 1971 1978 IMPROVED POLLUTANT PREDICTIONS IN LARGE-EDDY SIMULATIONS OF TURBULENT NON-PREMIXED COMBUSTION BY CONSIDERING SCALAR DISSIPATION RATE
More informationBasic engineering design of flares on oil platforms using computational fluid dynamics
Basic engineering design of flares on oil platforms using computational fluid dynamics Mauro C. B. Dolinsky, D.Sc PETROBRAS/CENPES Marcos Antonio P. Amaral, M.Sc PETROBRAS/CENPES Paulo Roberto Pagot, D.Sc
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 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 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 informationModel Studies on Slag-Metal Entrainment in Gas Stirred Ladles
Model Studies on Slag-Metal Entrainment in Gas Stirred Ladles Anand Senguttuvan Supervisor Gordon A Irons 1 Approach to Simulate Slag Metal Entrainment using Computational Fluid Dynamics Introduction &
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 informationPDF Modeling and Simulation of Premixed Turbulent Combustion
Monte Carlo Methods Appl. Vol. No. (), pp. 43 DOI 5 / MCMA.7. c de Gruyter PDF Modeling and Simulation of Premixed Turbulent Combustion Michael Stöllinger and Stefan Heinz Abstract. The use of probability
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 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 informationPDF modeling and simulation of premixed turbulent combustion
Monte Carlo Methods Appl. Vol. 4 No. 4 (8), pp. 343 377 DOI. / MCMA.8.6 c de Gruyter 8 PDF modeling and simulation of premixed turbulent combustion Michael Stöllinger and Stefan Heinz Abstract. The use
More informationA Discussion of Low Reynolds Number Flow for the Two-Dimensional Benchmark Test Case
A Discussion of Low Reynolds Number Flow for the Two-Dimensional Benchmark Test Case M. Weng, P. V. Nielsen and L. Liu Aalborg University Introduction. The use of CFD in ventilation research has arrived
More informationENTROPY PRODUCTION MODELING IN CFD OF TURBULENT COMBUSTION FLOW
ENTROPY PRODUCTION MODELING IN CFD OF TURBULENT COMBUSTION FLOW Ivar S. Ertesvåg, Jostein Kolbu Department of Energy and Process Engineering Norwegian University of Science and Technology NO-7491 Trondheim,
More informationNUMERICAL SOLUTION FOR THE COMBUSTION OF METHANE IN POROUS MEDIA
NUMERICAL SOLUTION FOR THE COMBUSTION OF METHANE IN POROUS MEDIA E. P. Francisquetti C. Q. Carpes pinto.francisquetti@ufrgs.br charles.carpes@ufrgs.br Graduate Program in Applied Mathematics, Federal University
More informationStructures of Turbulent Bunsen Flames in the Corrugated-Flamelet Regime
25 th ICDERS August 2 7, 2015 Leeds, UK Structures of Turbulent Bunsen Flames in the Corrugated-Flamelet Regime Junichi Furukawa and Yasuko Yoshida Department of Mechanical Engineering Tokyo Metropolitan
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 informationFlow Structure Investigations in a "Tornado" Combustor
Flow Structure Investigations in a "Tornado" Combustor Igor Matveev Applied Plasma Technologies, Falls Church, Virginia, 46 Serhiy Serbin National University of Shipbuilding, Mikolayiv, Ukraine, 545 Thomas
More informationNUMERICAL STUDY OF TURBULENT NORMAL DIFFUSION FLAME CH 4 -AIR STABILIZED BY COAXIAL BURNER
THERMAL SCIENCE: Year 2013, Vol. 17, No. 4, pp. 1207-1219 1207 NUMERICAL STUDY OF TURBULENT NORMAL DIFFUSION FLAME CH 4 -AIR STABILIZED BY COAXIAL BURNER by Zouhair RIAHI a*, Mohamed Ali MERGHENI c*, Jean-Charles
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 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 informationTURBULENT COMBUSTION NORBERT PETERS. Institut für Technische Mechanik Rheinisch-Westfälische Technische Hochschule Aachen, Germany
TURBULENT COMBUSTION NORBERT PETERS Institut für Technische Mechanik Rheinisch-Westfälische Technische Hochschule Aachen, Germany PUBLISHED BY THE PRESS SYNDICATE OF THE UNIVERSITY OF CAMBRIDGE The Pitt
More informationEvaluation of the Air-Demand, Flame Height, and Radiation from low-profile flare tips using ISIS-3D
American Japanese Flame Research Committees International Symposium Marriott Waikoloa, Hawaii - Oct. 22 24, 2007 Evaluation of the Air-Demand, Flame Height, and Radiation from low-profile flare tips using
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 informationA Method for the Prognosis of Turbulent Combustion
Final Project Report of the DFG-Transferbereich 42: A Method for the Prognosis of Turbulent Combustion S. Heinz 1 and R. Friedrich 2 1 University of Wyoming, USA, 2 Technische Universität München, Germany
More informationModified Porosity Distributed Resistance Combined to Flamelet Combustion Model for Numerical Explosion Modelling
Modified Porosity Distributed Resistance Combined to Flamelet Combustion Model for Numerical Explosion Modelling Dr. Sávio Vianna School of Chemical Engineering University of Campinas - UNICAMP University
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 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 informationDevelopment and Validation of a Partially Coupled Soot Model for Turbulent Kerosene Combustion in Industrial Applications
Development and Validation of a Partially Coupled Soot Model for Turbulent Kerosene Combustion in Industrial Applications by Bijan Shahriari A thesis submitted in conformity with the requirements for the
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 evaluation of NO x mechanisms in methane-air counterflow premixed flames
Journal of Mechanical Science and Technology 3 (009) 659~666 Journal of Mechanical Science and Technology www.springerlin.com/content/1738-494x DOI 10.1007/s106-008-1-y Numerical evaluation of NO x mechanisms
More informationStratified scavenging in two-stroke engines using OpenFOAM
Stratified scavenging in two-stroke engines using OpenFOAM Håkan Nilsson, Chalmers / Applied Mechanics / Fluid Dynamics 1 Acknowledgements I would like to thank Associate Professor Håkan Nilsson at the
More informationLES of the Sandia Flame D Using an FPV Combustion Model
Available online at www.sciencedirect.com ScienceDirect Energy Procedia 82 (2015 ) 402 409 ATI 2015-70th Conference of the ATI Engineering Association LES of the Sandia Flame D Using an FPV Combustion
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 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 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 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 informationThe influence of C ϕ is examined by performing calculations with the values C ϕ =1.2, 1.5, 2.0 and 3.0 for different chemistry mechanisms.
The Influence of Chemical Mechanisms on PDF Calculations of Nonpremixed Piloted Jet Flames Renfeng Cao and Stephen B. Pope Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca,
More informationCFD study of gas mixing efficiency and comparisons with experimental data
17 th European Symposium on Computer Aided Process Engineering ESCAPE17 V. Plesu and P.S. Agachi (Editors) 2007 Elsevier B.V. All rights reserved. 1 CFD study of gas mixing efficiency and comparisons with
More informationCFD ANALYSIS OF TURBULENCE EFFECT ON REACTION IN STIRRED TANK REACTORS
CFD ANALYSIS OF TURBULENCE EFFECT ON REACTION IN STIRRED TANK REACTORS Udaya Bhaskar Reddy R*, Gopalakrishnan S, Ramasamy E Department of Chemical Engineering, Coimbatore Institute of Technology, Coimbatore-
More informationManhar Dhanak Florida Atlantic University Graduate Student: Zaqie Reza
REPRESENTING PRESENCE OF SUBSURFACE CURRENT TURBINES IN OCEAN MODELS Manhar Dhanak Florida Atlantic University Graduate Student: Zaqie Reza 1 Momentum Equations 2 Effect of inclusion of Coriolis force
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 informationSimulation of opposed-jets configuration H2/air, CH4/air CHOUAL Kheireddine, BENZEGUIR Redouane
International Letters of Chemistry, Physics and Astronomy Online: 2015-07-03 ISSN: 2299-3843, Vol. 55, pp 34-46 doi:10.18052/www.scipress.com/ilcpa.55.34 2015 SciPress Ltd., Switzerland Simulation of opposed-jets
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 informationLecture 14. Turbulent Combustion. We know what a turbulent flow is, when we see it! it is characterized by disorder, vorticity and mixing.
Lecture 14 Turbulent Combustion 1 We know what a turbulent flow is, when we see it! it is characterized by disorder, vorticity and mixing. In a fluid flow, turbulence is characterized by fluctuations of
More informationEffect of modification to tongue and basic circle diameter on vibration in a double-suction centrifugal pump
5th International Conference on Information Engineering for Mechanics and Materials (ICIMM 2015) Effect of modification to tongue and basic circle diameter on vibration in a double-suction centrifugal
More informationBudget analysis and model-assessment of the flamelet-formulation: Application to a reacting jet-in-cross-flow
Center for Turbulence Research Proceedings of the Summer Program 212 397 Budget analysis and model-assessment of the flamelet-formulation: Application to a reacting jet-in-cross-flow By W. L. Chan, Y.
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 informationPIV measurements of cold flow field in a partially premixed bluff body burner M. Dutka, 1, M. Ditaranto 2, T. Løvås 1
PIV measurements of cold flow field in a partially premixed bluff body burner M. Dutka, 1, M. Ditaranto 2, T. Løvås 1 1 Department of Energy and Process Engineering, Norwegian University of Science and
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 NOx Emissions from Turbulent Propane Diffusion Flames
On NOx Emissions from Turbulent Propane Diffusion Flames Ph. MEUNIER, M. COSTA, and M. G. CARVALHO* Instituto Superior T&'nico, Mechanical Engineering Department. At'enida Rocisco Pats. 1096 Lisbon Codex.
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 informationUnsteady Flamelet Modeling of Soot Formation in Turbulent Diffusion Flames
Unsteady Flamelet Modeling of Soot Formation in Turbulent Diffusion Flames H. Pitsch Department of Applied Mechanics and Engineering Science Center for Energy and Combustion Research, University of California
More informationCFD MODELLING OF ISOTHERMAL MULTIPLE JETS IN A COMBUSTOR
Eleventh International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 7-9 December 2015 CFD MODELLING OF ISOTHERMAL MULTIPLE JETS IN A COMBUSTOR Shen LONG 1*, Zhao
More informationFluid Dynamics Exercises and questions for the course
Fluid Dynamics Exercises and questions for the course January 15, 2014 A two dimensional flow field characterised by the following velocity components in polar coordinates is called a free vortex: u r
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 informationErratum to: High speed mixture fraction and temperature imaging of pulsed, turbulent fuel jets auto igniting in high temperature, vitiated co flows
DOI 10.1007/s00348-015-2101-9 ERRATUM Erratum to: High speed mixture fraction and temperature imaging of pulsed, turbulent fuel jets auto igniting in high temperature, vitiated co flows Michael J. Papageorge
More informationSimplified Model of WWER-440 Fuel Assembly for ThermoHydraulic Analysis
1 Portál pre odborné publikovanie ISSN 1338-0087 Simplified Model of WWER-440 Fuel Assembly for ThermoHydraulic Analysis Jakubec Jakub Elektrotechnika 13.02.2013 This work deals with thermo-hydraulic processes
More informationThe influence of the spectrum of jet turbulence on the. stability, NOx emissions and heat release profile of. pulverised coal flames. Ph.D.
The influence of the spectrum of jet turbulence on the stability, NOx emissions and heat release profile of pulverised coal flames Ph.D. Thesis Neil Lincoln Smith " The University of Adelaide Qepartments
More informationA Computational Flame Length Methodology for Propane Jet Fires
A Computational Flame Length Methodology for Propane Jet Fires P.S. Cumber 1* and M. Spearpoint ** Heriot-Watt University * School of Engineering and Physical sciences Riccarton Campus Edinburgh United
More informationIMPROVEMENT OF CFD MODELS OF TUNNEL FIRE DEVELOPMENT BASED ON EXPERIMENTAL DATA
Vidakovi}, B. M., et al.: Improvement of CFD Models of Tunnel Fire Development S705 IMPROVEMENT OF CFD MODELS OF TUNNEL FIRE DEVELOPMENT BASED ON EXPERIMENTAL DATA by Barbara M. VIDAKOVI] a and Miloš J.
More informationFlow analysis in centrifugal compressor vaneless diffusers
348 Journal of Scientific & Industrial Research J SCI IND RES VOL 67 MAY 2008 Vol. 67, May 2008, pp. 348-354 Flow analysis in centrifugal compressor vaneless diffusers Ozturk Tatar, Adnan Ozturk and Ali
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 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 information240EQ212 - Fundamentals of Combustion and Fire Dynamics
Coordinating unit: Teaching unit: Academic year: Degree: ECTS credits: 2018 295 - EEBE - Barcelona East School of Engineering 713 - EQ - Department of Chemical Engineering MASTER'S DEGREE IN CHEMICAL ENGINEERING
More informationINTRODUCTION TO CATALYTIC COMBUSTION
INTRODUCTION TO CATALYTIC COMBUSTION R.E. Hayes Professor of Chemical Engineering Department of Chemical and Materials Engineering University of Alberta, Canada and S.T. Kolaczkowski Professor of Chemical
More informationCFD as a Tool for Thermal Comfort Assessment
CFD as a Tool for Thermal Comfort Assessment Dimitrios Koubogiannis dkoubog@teiath.gr G. Tsimperoudis, E. Karvelas Department of Energy Technology Engineering Technological Educational Institute of Athens
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 informationAnalysis of Heat Transfer in Pipe with Twisted Tape Inserts
Proceedings of the 2 nd International Conference on Fluid Flow, Heat and Mass Transfer Ottawa, Ontario, Canada, April 30 May 1, 2015 Paper No. 143 Analysis of Heat Transfer in Pipe with Twisted Tape Inserts
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 information2 nd Joint Summer School on Fuel Cell and Hydrogen Technology September 2012, Crete, Greece. Hydrogen fires
2 nd Joint Summer School on Fuel Cell and Hydrogen Technology 17 28 September 2012, Crete, Greece Hydrogen fires Sile Brennan (on behalf of the HySAFER group) Hydrogen Safety Engineering and Research Centre
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 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 information