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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。
The wind turbine exit velocity was used to simulate the different flight conditions of the pulse detonation engine (PDE). The force sensors were used to study the resistance of PDE with different inlet dynamic pressure (flight velocity) and with pneumatic valve closed and opened. The experimental results show that the PDE resistance increases linearly with the increase of inlet dynamic pressure and is proportional to the flight velocity. Pneumatic valve closed the greatest resistance, the different types of pneumatic valve structure, in its resistance to open when different. PDE detonation chamber mounted spoiler increased resistance, different pneumatic valve installed in the same spoiler, the resistance of the PDE to a different extent, the installation of rectifier grid is conducive to reducing resistance. The test results have important reference value for research on reducing the PDE resistance, increasing the effective thrust and predicting the resistance during high-speed flight while ensuring the normal operation of the PDE and generating a certain thrust.