脉冲爆震发动机气动阀阻力特性

利用风机出口速度模拟脉冲爆震发动机(PDE)的不同飞行状态,采用力传感器研究不同进气动压(飞行速度)下,气动阀关闭和开启时PDE的阻力。试验表明:PDE阻力随进气动压增加线性增加,与飞行速度成平方关系。气动阀关闭时阻力最大,对不同结构型式的气动阀,在其开启时阻力不同。PDE爆震室装扰流器时阻力增加,不同气动阀在装同种扰流器时,其对PDE的阻力影响程度不同,安装整流栅有利于降低阻力。试验结果在保证PDE正常工作和产生一定推力的条件下,对研究减小PDE阻力和提高有效推力及预估高速飞行时的阻力有重要参考价值。

Resistance characteristic of aerovalve of pulse detonation engine

The resistance characteristic of pulse detonation engine (PDE) with the aerovalve in opening and closing states is investigated by using force sensor under the conditions of various flow dynamic pressure, which is simulated by the exit velocity of fan. The experimental results show that the resistance increase with the increase of dynamic pressure and fly velocity. The resistances get their maximum value when the aerovalve is in closing state. For the aerovalve with different structure, the resistances of PDE are different, too. The turbulence generator (TG) installed in detonation chamber leads to an increase of resistance. The installed streamlined lattice benefits in reducing the resistance. These results are useful for predicting the PDE's resistance when the PDE works under the high speed and inducs some thrust.