Parallel Modeling of Three-Dimensional Scramjet Combustor and Comparisons with Experiment's Results

摘要

In this paper a parallel simulation of an experimental dual-mode scramjet combustor configuration is presented. Turbulence is modeled with the kappa-epsilon two-equation turbulence model and a 7-species 8-equation kinetics model is used to model hydrogen/air combustion. The conservation from of the Navier-Stokes equations with finite-rate chemistry reactions is solved using a diagonal implicit finite-volume method. Using about 3,12O,000 grid points the three-dimension flow-fields with equivalence ratio phi=0.0 and 0.35 have been respectively simulated on the parallel computer system obtaining more detailed flow properties than the experiment's results. Wall pressure comparisons between CFD and experiment show fair agreement. For phi=0.35 the fuel-penetrating height of the seven injectors are different because of the effects of the boundary layer and the shock wave in the combustor. According to numerical results, if adjusting the locations of the injectors the combustion efficiency could be improved.