气动阀式脉冲爆震发动机部分充填机理研究

研究了不同部分充填比例对煤油/空气气动阀式脉冲爆震发动机(PDE)的爆震波压力特性影响,初步分析了部分充填的爆震管内一系列波相互作用的机理.研究结果表明,在气动阀选定、爆震管长度和爆震管内部结构一定条件下,随着脉冲爆震发动机可爆混气充填爆震管比例的降低,虽然爆震波压力峰值略有下降,但是,单位体积可爆混气获得的冲量线性增加,提高了脉冲爆震发动机的工作性能.研究结果对于煤油/空气气动阀式脉冲爆震发动机的总体优化设计,提高PDE的工作性能具有重要的参考价值.

Investigation on Pneumatic-Valve Pulse Detonation Engine with Partial Detonable Mixture Filling

Effects of partial detonable mixture filling proportion on detonation wave pressure properties of kerosene/air pneumatic-valve pulse detonation engine were investigated.A preliminary analysis of a series of wave's reciprocity was carried out.Experimental results show that with given double swirl and direct pneumaticvalve and detonation tube structure,the decrease of partial detonable mixture filling proportion causes a little decrease of the peak value of detonation waves' pressure,but impulse per unit volume of detonable mixture increases linearly.This investigation is important to the design optimization of the kerosene/air pneumatic-valve PDE,and to improve the performance of PDE.