模拟亚声速自由来流,以汽油和空气为推进剂,对吸气式PDE模型机进行了地面多循环爆震试验,研究了6种进气系统下PDE模型机的多循环爆震性能和推进性能。试验结果显示,不论采用何种进气系统,均能以低于50mJ的点火能量实现模型机的多循环单级起爆,且PDE平均推力均随着工作频率的增加而增加;来流喷口和进气道进口面积较小时增加速率较快。随着环缝堵塞比的增加,PDE的平均推力有所降低。 Simulated subsonic free flow, gasoline and air as propellant, aspirated PDE model machine ground multi-cycle detonation test, studied the 6 kinds of intake system PDE model multi-cycle detonation performance and propulsion performance. The experimental results show that the multi-cycle single-stage detonation of the model machine can be realized with less than 50mJ ignition energy regardless of the air intake system, and the PDE average thrust increases with the increase of operating frequency. Increased airway velocity increases faster with smaller airway area. As the girth plugging ratio increases, the average thrust of the PDE decreases.