Open-code program AMROC of block-structured adaptive mesh refinement was adopted to conduct high-resolution numerical simulation of two-dimensional detonation initiation in supersonic combustible mixtures using hot jet. Detailed chemistry mechanism of hydrogen

oxygen

argon was considered in the simulation. Detonation initiation in supersonic combustible mixtures and the formed elaborate detonation cell were investigated. Results show that the hot jet is similar with a pneumatic ramp in supersonic combustible mixtures

so as to realize shock-induced combustion. The continuous ejection of hot jet in supersonic combustible mixtures could result in forming of overdriven detonation and irregular detonation cell. The disturbance and compression function of hot jet plays an important role in the forming of overdriven detonation and its irregular detonation cell. Disturbance and compression function of hot jet propagates at local sonic velocity

yielding an impact on the forward detonation front after getting across the subsonic zone behind the detonation front. In this way overdriven detonation could be maintained to form the irregular detonation cell.