Performance Analysis of Typical Reaction Mechanisms for the Use in Supersonic Combustion

Abstract

Several different kinds of reaction mechanisms are developed for the numerical simulation of supersonic combustion problem, which contains substantial intricacy interactions of shock/boundary and shock/flame, and crucial phenomena such as self-ignition, local extinction and re-ignition. Three typical mechanisms are discussed to test their performance in the prediction of temperature and self-ignition position in this paper. It can be seen that the Evans’s mechanism predict a later ignition position, while the other two detailed mechanisms show good agreement with the experiment data. Meanwhile, lower temperature predicted by Evans’s mechanism can be observed which matchs the later ignition position prediction. The numerical results suggest that detailed mechanisms are more suitable for supersonic combustion simulation and LaRC’s mechanism seems a little better than the other.