气动阀式脉冲爆震发动机推力因数

为了进一步研究脉冲爆震发动机(PDE)的有效推力,对影响有效推力的因数进行了研究.采用旋流式气动阀,在爆震管直径60 mm内成功实现了吸气式汽油/空气PDE的连续爆震燃烧.冷态状态下研究了PDE阻力和爆震管填充速度与冲压来流速度的关系,热态状态下研究了气动阀推力壁压力.对一个工作周期正反向推力和阻力的计算结果表明,PD...

Influence coefficient of thrust for aero-valve pulse detonation engine

A study about the influence factors on effective thrust of pulse detonation engine ( PDE) is carried out to obtain effective thrust. The continuous detonation combustion of air-breathing/gasoline-air PDE is achieved by using the cyclone-type aero-valves in a detonation tube with diameter of 60 mm. The effects of the filling speed of detonation tube and the stamping flow speed on the drag of PDE are analyzed based on the cold-state experiments,while the pressure p3 of the aero-valve is studied in the thermal-state experiments. The results of calculation for the thrust and drag in a period show that PDE can output effective thrust at the frequency of 10 Hz,but this effective thrust is difficult to be measured under actual working conditions. The research on the continuous effective thrust for PDE indicates that the operating frequency,detonation intensity, internal and external drag are the decision factors,while reducing the spoiler drag is the key to obtain the effective thrust.