Numerical study on the shock/combustion interaction of oblique detonation waves

摘要

To determine the shock/combustion interaction structure of a wedge-induced oblique detonation wave, high-order numerical simulations solving the two-dimensional reactive Euler equations embedded with a two-step chemical kinetic model have been performed. In this study, various dimensionless heat release amounts ranging from 40.0 to 52.5 are selected to investigate the flow configuration. The computational results show that four types of typical shock/combustion interactions, namely, Type VI, I, V and IV (following the classification of shock/shock interaction proposed by Edney), can be observed. The detailed structures and characteristics of the interaction types are presented and shown to be different than the classic shock/shock interaction. Additional insight into the transition principles of different shock/combustion interactions is illustrated through shock polar analysis. (C) 2020 Elsevier Masson SAS. All rights reserved.