中文摘要：

为了研究脉冲爆轰发动机进气压力对爆轰过程的影响，对以汽油空气混和物为燃料的脉冲爆轰发动机进行了实验研究．实验得到了工作频率为33Hz和40Hz的稳定爆轰波，其峰值压力分别为1．5～1.8MPa和1．3～1．8MPa．实验结果表明，空气进口压力对点火起爆过程及爆轰频率等具有大的影响，当进口空气压力降低，点火起爆过程变难，爆轰频率下降．实验结果对脉冲爆轰发动机机理研究及实验装置改进等具有一定的参考价值．

英文摘要：

In order to investigate the effect of inlet pressure on detonation in Pulse Detonation Engine （PDE）, the experiments were done. It was filled with the mixture of gasoline and air in PDE. The steady detonation at the frequency of 33 Hz and 40 Hz was acquired, and their peak pressures are 1.5-1.8 MPa and 1.3-1.8 MPa respectively. The experiments indicate that the air inlet pressure have important effects on ignition process, detonation process, and frequency of detonation. When the inlet pressure is reduced, ignition process and detonation process get difficult, and frequency of work will drop. The results have important value on mechanism research and improvement of experiment device about PDE.