Scramjet Combustor Simulations Using Reduced Chemical Kinetics for Practical Fuels.

摘要

This report covers work performed to make hydrocarbon combustion modeling simulations for scramjet flow fields practical. Several approaches were combined and demonstrated to greatly improve the time required for simulating complex hydrocarbon combustion reactions in scramjet-type flows. A code that converts a large set of reactions to a FORTRAN subroutine that computes reaction rates for a reduced set of species was refined and applied. An efficient methodology for storing and reusing reaction rate computations via a multidimensional adaptive table was developed and applied. A methodology for limiting reaction rates based on fine scale molecular mixing was incorporated into the tabular methodology and applied. A code for evaluating the impact of subgrid scale nonuniformity in temperature and species on reaction rate was also developed.