关键词: 脉冲爆轰发动机;喷管;推进效能+;燃料填充系数+

Abstract: A grid adaptive finite volume method combined with kinetic chemical reaction model is adopted to simulate the flow field of detonation wave propagating through a divergent channel.The investigation is focused on the performance of pulse detonation engine depending on the nozzle shape and the partial fuel fill in the chamber.It is found that the impulse of the straight detonation tube with a hydrogen-oxygen mixture achieves its maximum at a certain filling factor.On the other hand,as to the nozzles with a larger divergent angle,the impulse increases with increasing fuel filling,although in most case the specific impulse increases with the decrease in fuel filling.The specific impulse is obviously improved if the nozzle shape and fuel filling are designed properly.

Key words: Pulse detonation engine;Nozzle;Propulsion performance+;Partial fuel filling+