A GLOBAL SIMULATION METHOD FOR OBTAINING REDUCED REACTION-MECHANISMS FOR USE IN REACTIVE BLAST WAVE FLOWS

A finite rate chemistry solver usually consumes the largest part of th e computing time in the numerical simulation of reactive flows. To red uce these costs, a global simulation method has been developed for sys tematically simplifying detailed reaction mechanisms and a reduced rea ction mechanism for CH4 - O-2 is presented. This reduced mechanism acc urately replicates the associated detailed mechanism whilst significan tly reducing the required computing time. A shock induced methane comb ustion problem is computed by coupling the reduced reaction mechanism to a 1-D viscous compressible flow solver. As a comparison, a simulati on of non-reactive shock flow having the same initial conditions is al so performed. These calculations reveal some of the key features found in reactive shock flows.