Fine Structure and Its Influence Factor of Wedge-Induced Oblique Detonation Waves

Oblique detonation wave stabilized over a body has been studied due to the ongoing development of high-speed propulsion systems.In order to study the fine structure and its influence factor of oblique detonation wave,the phenomenon of wedge-induced oblique detonation wave was simulated numerically based on the reactive Euler equation using fifth-order WENO scheme.The numerical results show that with the compression of the wedge wall the detonation wave front structure is divided into three sections: ZND-like structure,single-headed triple point structure and dual-headed triple point structure.In addition the triple point traces are recorded to obtain different cell structures,in which the single-headed triple trace has the characteristics of parallel straight lines and the dual-headed triple trace is inclining cellular pattern.Influence of the inlet Mach number and wedge angle on wedge compressibility is also analyzed.Increase of the two parameters strengthens the wedge compressibility,which makes the detonation wave smooth.