扰流片对汽油/空气脉冲爆震发动机爆震波压力的影响

在汽油 空气吸气式脉冲爆震发动机(PDE)协调工作的基础上,利用动态压力传感器测量了爆震波峰值压力。研究了圆环型扰流片的堵塞比、片数和间距对爆震波峰值压力的影响,以及上游扰流片间和下游扰流片间压力波峰值压力的变化。研究表明:一定结构的PDE,扰流片存在合理的堵塞比和间距以及最少片数。试验得到最佳堵塞比为44 5%左右,最佳片间距为爆震管内径的2倍左右,最少片数为6片。这些结果对PDE和扰流器的优化设计有重要指导意义。

Effects of parameters of turbulence generator on the detonationwave in air-breathing gasoline-air pulse detonation engine

Based on the coordinately working of air-breathing gasoline-air pulse detonation engine (PDE), the pressure peaks of detonation wave were measured using pressure sensor. The effects of blockage ratio, vane number and space of turbulence generator on detonation wave as well as the change of pressure peaks between two vanes located in upstream or downstream were investigated. It is shown that there are optimum blockage ratio and vane number for PDE. The optimum blockage ration is 44.5%.The optimum vane space is two times of diameter of PDE tube.The optimum vane number is 6.These results are helpful in the design of PDE and turbulence generator.