矩形埋入式进气口引气流量规律研究

摘要

矩形埋入式进气口是一种新型冷风道引气方式,其功能是将飞机外部冷空气引入飞机内部使用.所讨论的矩形埋入式进气口主要应用于发动机舱通风冷却系统.通过对矩形埋入式进气口在亚—跨—超声速范同内流量特性的数值仿真计算,发现在条件不变的情况下,随着导流板角度增大,进气口引气流量单调减小.结合风洞吹风试验结果和工程实际需要,认为导流板角度在15.左右可以参考使用,研究结果可为发动机舱通风冷却系统设计提供参考.%The rectangular submerged air intake is a new kind of cool air intake. It is used to import cool air out oi the airplane into the airplane. The rectangular submerged air intake studied here is used mainly in the system of the ventilation and cooling of the engine cabin. Based on the calculation of the flux property of the rectangular submerged air intake in the subsonic- sonic- supersonic velocity range,we discovered that the decrease of the air intake accompanied with the increase of the angle of air lead board when other variables are not taken into account. To consult the result of wind tunnel test,the usable angle of the air lead board is approximately 15°. Our research provides meaningful recommendation for the design of the ventilation and cooling of the engine cabin.