Turbulence-Chemistry Interaction and Heat Transfer Modeling of H 2 /O 2 Gaseous Injector Flows

Reliable prediction of rocket injector flows introduces significant challenges associated with the complex physics involving recirculation, turbulence, scalar mixing, chemical reactions and wall heat transfer. This work is aimed at assessing the importance of turbulence-chemistry interaction and non-equilibrium effects in experimentally characterized single and multi-element injector flows. By examining the different chemistry models (laminar finite rate, assumed PDF with either flamelet or equilibrium assumption), it was found that for both cases investigated, chemical non- equilibrium is insignificant while substantial turbulence-chemistry interaction is observed. A zonal wall treatment was developed based on a blend of SST low-Re turbulence wall treatment and law- of-the-wall, showing improved predictive capability. A heat flux extraction method was also proposed to estimate heat flux results from adiabatic flamelet model under the consideration that wall heat loss is small compared to the overall energy generated by chemical reactions.

[1]  Wei Shyy,et al.  An Algorithm for Chemically Reacting Flows on Generalized Grids Using a Rule-Based Framework , 2005 .

[2]  Edward A. Luke,et al.  Numerical simulations of mixtures of fluids using upwind algorithms , 2007 .

[3]  Joseph C. Oefelein,et al.  Modeling High-Pressure Mixing and Combustion Processes in Liquid Rocket Engines , 1998 .

[4]  Wei Shyy,et al.  Computational Assessment of Gaseous Reacting Flows in Single Element Injector , 2009 .

[5]  Michael Oschwald,et al.  INJECTION OF FLUIDS INTO SUPERCRITICAL ENVIRONMENTS , 2006 .

[6]  J. Gani,et al.  Statistical Models and Turbulence. , 1972 .

[7]  W. Jones,et al.  Modelling and measurements in turbulent combustion , 1985 .

[8]  N. Peters.  Local Quenching Due to Flame Stretch and Non-Premixed Turbulent Combustion , 1983 .

[9]  Norbert Peters,et al.  Scalar dissipation rates in turbulent jets and jet diffusion flames , 1989 .

[10]  Mauritz A. deRidder,et al.  Measurement and Analysis of Heat Transfer in a Multi- Element Hydrogen/Oxygen Rocket Combustor , 2008 .

[11]  Charles Merkle,et al.  Propulsion-related flowfields using the preconditioned Navier-Stokes equations , 1992 .

[12]  Yen-Sen Chen,et al.  Compressible and incompressible flow computations with a pressure based method , 1989 .

[13]  W. Mayer,et al.  Time- and Length Scales of Combustion in Liquid Rocket Thrust Chambers , 2002 .

[14]  F. Williams,et al.  Turbulent Reacting Flows , 1981 .

[15]  C. Segal,et al.  Heat Fluxes/OH PLIF Measurements in a GO2/GH2 Single- Element, Shear Injector , 2007 .

[16]  Jeff West,et al.  CFD Code Validation of Wall Heat Fluxes for a G02/GH2 Single Element Combustor , 2005 .

[17]  Hiroshi Tamura,et al.  Propellant injection in a liquid oxygen/gaseous hydrogen rocket engine , 1996 .

[18]  Raphael T. Haftka,et al.  Computational Modeling and Sensitivity Evaluation of Liquid Rocket Injector Flow , 2007 .

[19]  N. Peters.  Laminar diffusion flamelet models in non-premixed turbulent combustion , 1984 .

[20]  W. Anderson,et al.  Heat Flux and Pressure Profiles in an Oxygen/Hydrogen Multielement Rocket Combustor , 2010 .

[21]  F. A. Williams,et al.  Recent Advances in Theoretical Descriptions of Turbulent Diffusion Flames , 1975 .

[22]  Selmer M. Johnson,et al.  Chemical Equilibrium in Complex Mixtures , 1958 .

[23]  Johannes Janicka,et al.  Prediction of turbulent jet diffusion flame lift-off using a pdf transport equation , 1982 .

[24]  V. Golovitchev,et al.  Comparison of high pressure H2/O2 rocket model-engine reference simulations , 1995 .

[25]  Roger Woodward,et al.  Benchmark Wall Heat Flux Data for a GO2/GH2 Single Element Combustor , 2005 .

[26]  F. Menter,et al.  Ten Years of Industrial Experience with the SST Turbulence Model , 2003 .

[27]  C. J. Schexnayder,et al.  Influence of Chemical Kinetics and Unmixedness on Burning in Supersonic Hydrogen Flames , 1980 .

[28]  Joseph C. Oefelein,et al.  MIXING AND COMBUSTION OF CRYOGENIC OXYGEN-HYDROGEN SHEAR-COAXIAL JET FLAMES AT SUPERCRITICAL PRESSURE , 2006 .

[29]  Gary Cheng,et al.  Real Fluid Modeling of Multiphase Flows in Liquid Rocket Engine Combustors , 2006 .

[30]  Charles L. Merkle,et al.  COMPARISON OF COMPUTATIONAL CODES FOR MODELING HYDROGEN-OXYGEN INJECTORS , 1997 .

[31]  Vigor Yang,et al.  Validation of High-Fidelity CFD Simulations for Rocket Injector Design , 2008 .

[32]  Manish Deshpande,et al.  Experimental and analytical characterization of a shear coaxial combusting GO2/GH2 flowfield , 1996 .

[33]  R. Barlow,et al.  Effect of Damkohler number on superequilibrium OH concentration in turbulent nonpremixed jet flames , 1990 .

[34]  Edward A. Luke,et al.  Loci: a rule-based framework for parallel multi-disciplinary simulation synthesis , 2005, J. Funct. Program..

[35]  Asymptotic methods in turbulent combustion , 1986 .

[36]  Log-normality of temperature dissipation in a turbulent boundary layer , 1977 .

[37]  Robert H. Nichols,et al.  Wall Function Boundary Conditions Including Heat Transfer and Compressibility , 2004 .

[38]  Sanjay M. Correa,et al.  Computational models and methods for continuous gaseous turbulent combustion , 1987 .

[39]  Jeffrey Wright,et al.  Validation of a Pressure-Based Combustion Simulation Tool Using a Single Element Injector Test Problem , 2006 .

[40]  R. W. Bilger,et al.  The prediction of turbulent diffusion flame fields and nitric oxide formation , 1977 .

[41]  S. K. Liew,et al.  Flamelet models of turbulent non-premixed combustion , 1981 .

[42]  F. Menter.  Two-equation eddy-viscosity turbulence models for engineering applications , 1994 .