引射器入口形状对PDE的性能影响实验

EFFECT OF EJECTOR INLET GEOMETRY ON THE PERFORMANCE OF PULSE DETONATION ENGINE

对具有两种不同进气口形状的脉冲爆震发动机(PDE)引射器增推性能进行了实验研究。实验采用汽油为燃料,空气为氧化剂。文章设计了六组具有不同直径、不同引射器入口形状的圆柱型引射器。实验采用力传感器法对具有圆形和收敛形入口形状的引射器的增推性能进行了实验研究。结果发现脉冲爆震发动机加引射器后的增推性能均有明显的改善。在引射器长径比一定的情况下,采用收敛型进气口的引射器普遍比采用圆形进气口结构的引射器增推效果明显。当引射器位于主爆震管的上游时,直径比为2.5引射器相对其它引射器具有更高的推力增益,最大可达80.5%。

An experimental investigation was described in which thrust augmentation was measured for two kinds of ejectors of Pulse Detonation Engine(PDE)with different inlet geometry using gasoline as fuel and air as oxidizers.Six rounded straight ejectors with distinct inlet contour and different diameter were designed.In this experiment,the rounded inlet and convergent inlet mounted on various straight ejectors were utilized to determine its effect on thrust augmentation by thrust transducer.The experimental result...