Improved Kinetic Models for High-Speed Combustion Simulation; Final rept. 18 May 2006-18 Jun 2008

摘要

Report developed under an STTR contract. The overall goal of this STTR project has been to improve the realism of chemical kinetics in computational fluid dynamics modeling of hydrocarbon-fueled scramjet combustors. A new, pressure-dependent detailed chemical kinetic model for a JP- 8 surrogate has been created. Extinction strain rate measurements have been performed with an opposed-jet burner at subatmospheric conditions for a variety of fuels, namely: methane, ethylene, n-heptane, Jet A, n-decane, trimethylbenzene, and blends of n-decane and trimethylbenzene. Skeletal and quasi-steady-state (QSS) reduced mechanisms have been created based on the new mechanism and mechanisms from the literature for ethylene, JP-8, and n-decane. Parallel strategies for the in situ adaptive tabulation (ISAT) algorithm have been implemented and tested. Reduced mechanisms and ISAT have been demonstrated in the CFD++ and VULCAN CFD codes.