煤油/空气小尺寸脉冲爆震发动机实验研究

 为探索微小尺寸脉冲爆震发动机(SPDE)推进系统可行性，进行了气动阀设计，改善燃油雾化、掺混、点火性能和强化燃烧等SPDE关键技术的研究。设计了一台内径为29 mm，总长度为1 175 mm的气动阀式SPDE样机，采用航空煤油为燃料和地面冲压进气，并在该样机上进行了低点火能量的多循环实验研究。实验结果表明：SPDE能够在20~40 Hz频率下多循环地稳定工作，平均峰值压力均高于145 MPa；随着频率的增加，爆震室内平均压力峰值和爆震波平均速度都有一定的降低趋势；研究结果为有限空间和时间内的燃油雾化、蒸发和掺混进一步研究提供了依据，对研制工程应用的SPDE具有重要意义。

Experimental Investigation on Small-scale Pulse Detonation Engine with Kerosene/Air

To explore the feasibility of small-scale pulse detonation engine(SPDE) propulsion systems,an inves-tigation is conducted on some key techniques of SPDE, including aero-valve design, fuel atomization and mix-ing, improved ignition reliability and enhanced combustion. An SPDE model is designed with an aero-valve 29 mm in diameter and an overall length of 1 175 mm. The model performs with kerosene as fuel under the condi-tion of filling air by an airblower, and is ignited by a spark plug with low energy. Multi-cycle detonation exper-iments show that the SPDE model can steadily operate at the frequency range of 20-40 Hz. It is observed that the average peak value of the detonation wave pressure is more than 1.45 MPa. As the operating frequency in-creases, the values of the detonation wave pressure and velocity inside the detonation chamber both show a de-creasing tendency. The experimental results provide a basis for further investigation on fuel atomization, va-porization and mixing within limited space and time, and are useful for the development of engineering applica-tion of SPDE.