点火能量对脉冲爆震发动机性能的影响

Experiment on the effect of ignition energy in pulse detonation engine

关键词:  脉冲爆震发动机  点火能量  点火-起爆时间  平均推力

Key words:  Pulse detonation engine  Ignition energy  Ignition-detonation time  Average thrust

摘要:

针对以汽油-空气为推进剂的吸气式脉冲爆震发动机,研究了点火能量及工作频率对发动机点火-起爆时间和发动机推进性能的影响。结果显示,随着点火能量的提高,点火-起爆时间逐渐减小,脉冲爆震发动机平均推力逐渐增加。随着发动机工作频率的提高,点火-起爆时间也逐渐减小,发动机稳定工作的最佳油气当量比减小,发动机平均推力接近线性增加;但是点火能量对发动机点火-起爆时间的影响随着工作频率的提高而有所降低。

Abstract:

The ignition energy and operation frequency effects on the ignition-detonation performance and propulsion performance of gasoline-air two-phase valveless pulse detonation engine(PDE) were presented.In order to observe the effects of ignition energy and operation frequency on ignition-detonation time and PDE performance,the proof-of-principle experiments of PDE were carried out.The results indicates that the ignition energy and operation frequency have important effects on ignition-detonation time.As the ignition energy increases,the ignition-detonation time decreases and the average thrust of PDE increases.As the operation frequency increases,the ignition-detonation time decreases and the ignition energy effect on ignition-detonation time degenerates.The optimum fuel/air equivalence ratio decreases and the average thrust of air-breathing PDE increases nearly linearly with the operation frequency increasing.