斜爆轰波系在受限空间内的演变及其临界条件的数值研究

Numerical techniques for multi-species chemical reacting flows are applied to study the macrostructures of oblique detonation waves in confined space. The key features, the evolution of the overall wave structure, and the transitional criteria are analysed. The results show that with the increase of wedge angle, four structures appear in turn: shock-induced combustion, oblique detonation double regular reflection, Mach reflection in reflux zone, and wedge combustion. The simulations reveal three critical conditions of the compression angle for the maintenance of stable wave structures, i.e., lower-critical, sub-critical, and upper critical conditions. In addition, the transition between regular and Mach reflections occurs during the evolution process of the macro wave structure.