中文摘要：

应用二维守恒元和求解元方法数值模拟脉冲爆轰发动机内汽油／空气两相燃烧转爆轰的过程．分析了爆轰波从开始产生到形成稳定的全过程．研究了点火能量对燃烧转爆轰过程的影响：点火能量越小，DDT时间越长；若点火能量过小就不能形成DDT．同时研究了液滴半径对爆轰参数的影响：液滴半径增大，爆轰波压力和速度随之减小，DDT时间增加；液滴半径过大，则爆轰波不能形成．爆轰波压力计算值与实验值两者趋势符合得较好．

英文摘要：

The method of two-dimensional conservation element and solution element is employed to simulate the gasoline/ air interior flow field of pulse detonation engine. The development process of detonation is discussed. Ignition energy has great effect on DDT time. As ignition energy decreases, DDT time increases. If ignition energy is too small, DDT can＇ t form. Liquid radius has also great effect on detonation parameters. The bigger the droplet radius is, the smaller the detonation pressure and velocity are, and the longer the DDT time is. Detonation wave will fail to from if radius is too big. The numerical calculation results agree well with the experimental results, and the conclusions can be applied to PDE design and experimental study.