空气流量对煤粉 -空气两相旋转爆轰波的影响

A lot of studies on rotating detonation engines have been carried out due to the theoretically higher thermal efficiency compared with traditional deflagration engines. However, there are few investigations reported on gas-solid two-phase rotating detonation engines which may be used as solid ramjets. In this paper,two-dimensional numerical simulations based on a non-premixed coal-air rotating detonation engine were carried out. The unsteady viscous model with volumetric reaction was used for the gas phase,the discrete phase model was used for the solid phase,and the kinetics / diffusion-limited rate model was used for the surface combustion of coal. The effect of air flow rate on the rotating detonation wave was studied. The working characteristics of the rotating detonation engine under different modes were analyzed and the numerical simulation results were verified by experiments. Results show that the calculated velocity and flow field of the rotating detonation agree well with the experimental results.