脉冲爆震发动机引射器的实验研究

Experimental Investigation of a Pulse Detonation Engine(PDE) Ejector

实验采用汽油为燃料,压缩空气为氧化剂,对多循环脉冲爆震发动机(PDE)引射器的性能参数进行了实验研究。研究的特性参数包括引射器的冲量、平均推力和引射空气量。实验结果表明引射系统可以利用排出爆震管的强激波所储存的能量使爆震管单独产生的平均推力增加,平均推力增益最高可达38%。爆震频率越高,引射空气量越大,当爆震频率为35Hz时引射比达4.62。

A preliminary experimental investigation of the performance of ejectors on a multi-cycle pulse detonation engine tube is performed using gasoline as fuel and compressed air as oxidizers. The objective is to investigate the average thrust, impulse and mass flow rate characteristics of the ejector. The average thrust is measured from the pressure history on PDE head end. The experimental results indicate that ejector system can utilize the energy-stored in the strong shock wave exiting the detonation tube to augment the average thrust obtained from the detonation tube alone. The highest average thrust augmentation is 38%. The entrained mass flow increases with the increase of the operation frequency. The highest entrained mass flow rate is 4.62 when the operation frequency is 35 Hz.