中文摘要：

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29mm,总长度为1175mm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20～40Hz频率下多循环地稳定工作,平均峰值压力均高于1.45MPa;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。

英文摘要：

To explore the feasibility of small-scale pulse detonation engine（SPDE） propulsion systems, an investigation is conducted on some key techniques of SPDE, including aero-valve design, fuel atomization and mixing, 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 ram. The model performs with kerosene as fuel under the condition of filling air by an airblower, and is ignited by a spark plug with low energy. Multi-cycle detonation experiments 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 increases, the values of the detonation wave pressure and velocity inside the detonation chamber both show a decreasing tendency. The experimental results provide a basis for further investigation on fuel atomization, vaporization and mixing within limited space and time, and are useful for the development of engineering application of SPDE.