Turbulent reacting flow computations including turbulence-chemistry interactionsA two-equation (k-epsilon) turbulence model has been extended to be applicable for compressible reacting flows. A compressibility correction model based on modeling the dilatational terms in the Reynolds stress equations has been used. A turbulence-chemistry interaction model is outlined. In this model, the effects of temperature and species mass concentrations fluctuations on the species mass production rates are decoupled. The effect of temperature fluctuations is modeled via a moment model, and the effect of concentration fluctuations is included using an assumed beta-pdf model. Preliminary results obtained using this model are presented. A two-dimensional reacting mixing layer has been used as a test case. Computations are carried out using the Navier-Stokes solver SPARK using a finite rate chemistry model for hydrogen-air combustion.
Document ID
19920043164
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Narayan, J. R. (MCAT Institute Moffett Field, CA, United States)
Girimaji, S. S. (Analytical Services and Materials, Inc. Hampton, VA, United States)