中文摘要：

为了研究脉冲爆震发动机内压力波系的特点，推导了二维时空守恒元与求解元（CE／SE）方法，将该方法用于无喷管和带收敛扩张喷管2种脉；中爆震发动机内流场的计算中．计算结果表明，脉冲爆震发动机由于爆震波的存在使其内压力出现强间断；带收敛扩张喷管的脉冲爆震发动机由于喷管的存在，发动机内压力场由爆震波及其后产生的一系列反射压缩波和膨胀波相互作用、相互叠加而成,计算结果对脉；中爆震发动机的机理及流场特性研究具有重要的参考价值．

英文摘要：

In order to investigate the characters of pressure wave system in pulse detonation engine（PDE）, the two-dimension space-time conservation element and solution element（CE/SE） method was deduced to simulate interior flow of PDE with convergent-divergent nozzle or without. The results indicate that there is strong pressure discontinuity in PDE because of the existence of detonation wave. Due to the convergent-divergent nozzle of PDE, the pressure field consists of detonation wave, reflecting compression waves and expansion waves which appear after the detonation wave transiting the nozzle, and these waves interact with each other. All results have an important value on the investigation of PDE＇s mechanism and characteristic of flow field.