两种前体压缩方式对斜爆震燃烧影响的数值研究

In order to promote engineering applications and investigate the effects of ODE forebody compression degree on the combustion characteristics of oblique detonation wave (ODW), two simplified compression models, namely two equal strength shock compression and oblique shock-isentropic compression were established. Numerical simulations were conducted to study the effects of two compression methods on the ODW structure and the total pressure loss of ODW under flight Mach numbers ranging from 8 to 10. Results show that the difference of forebody compression methods may change the initiation structure and the initiation position of ODW inside the combustor. As the flight Mach number decreases, the impact of compression methods on the initiation structure undermines, but the effect on the initiation position strengthens. Two equal strength shock compression has lower total pressure loss of ODW combustion process, and can reduce the ignition distance, which helps shorten the combustor length. However, considering the process of inflow compression and combustion together, oblique shock-isentropic compression has larger total pressure at the outlet of combustor. The design of ODE needs to comprehensively consider the forebody compression and ODW combustion loss to achieve the best overall engine performance.