Interaction between chemical reaction and turbulence in supersonic nonpremixed H2-air combustion

A numerical model for supersonic turbulent nonpremixed hydrogen-air jet flames is developed for exploring the interaction between chemical reaction and turbulence. The numerical code employs an implicit finite-volume, lower-upper successive overrelaxation (LU-SSOR) scheme for solving density-averaged Navier-Stokes equations with chemical reactions in axisymmetric flows. The effects of turbulence on chemical reaction are included by approximations appropriate in the limit of weak turbulence. Comparison of numerical results with and without the influence of turbulence on the chemical kinetics reveals that even under the condition of weak turbulence, the effect of turbulence on chemistry can be significant.

[1]  H. Beach.  Supersonic mixing and combustion of a hydrogen jet in a coaxial high-temperature test gas. , 1972 .

[2]  Numerical modeling of turbulent supersonic reacting coaxial jets , 1989 .

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

[4]  Seokkwan Yoon,et al.  Numerical study of chemically reacting flows using an LU scheme , 1988 .

[5]  F. C. Lockwood,et al.  The prediction of the fluctuations in the properties of free, round-jet, turbulent, diffusion flames , 1975 .

[6]  Robert W. Bilger.  Turbulent jet diffusion flames , 1976 .

[7]  S. Jeng,et al.  Species Concentrations and Turbulence Properties in Buoyant Methane Diffusion Flames , 1984 .

[8]  J.-Y. Chen,et al.  Segregation parameters and pair-exchange mixing models for turbulent nonpremixed flames , 1991 .

[9]  S. Jeng,et al.  Probability density function shape sensitivity in the statistical modeling of turbulent particle dispersion , 1992 .

[10]  Gerard M. Faeth,et al.  Drop-turbulence interactions in a diffusion flame , 1985 .

[11]  S. Jeng,et al.  Efficient Statistical Transport Model for Turbulent Particle Dispersion in Sprays , 1991 .

[12]  Wolfgang Kollmann,et al.  Chemical models for pdf modeling of hydrogenair nonpremixed turbulent flames , 1990 .

[13]  C. J. Schexnayder,et al.  Application of a two-dimensional parabolic computer program to prediction of turbulent reacting flows , 1978 .

[14]  Robert W. Bilger,et al.  Reaction rates in diffusion flames , 1977 .

[15]  Y.-L. Peter Tsai,et al.  Comparative study of computational efficiency of two LU schemes for non-equilibrium reacting flows , 1990 .

[16]  Modeling Ideally Expanded Supersonic Turbulent Jet Flows with Nonpremixed H2-Air Combustion , 1992 .

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

[18]  S. Jeng,et al.  Efficiency of a statistical transport model for turbulent particle dispersion , 1992 .