航空发动机引气转换装置建模仿真与改进设计

Modeling,Simulation and Improving Design of Aircraft Engine Air Bleeding Conversion Device

为解决某航空发动机引气转换装置转换不可靠问题,对装置进行受力与节流面分析,根据活门、壳体及弹簧参数在AMESim平台上构建模型。以发动机试车数据为算例进行计算,分析凸台尺寸及装置后节流面积对转换特性的影响。仿真结果表明,将凸台直径或装置后节流面积减小均有利于活门转换;由于改变装置后节流面积对润滑系统影响较大,通过将引气转换装置活门凸台直径减小2 mm,解决转换不可靠问题,经发动机整机试验验证有效。

In order to solve the problem of unreliable transformation of air bleeding conversion device,we make a force and throttle area analysis of valve.Based on the simulation model established on AMESim by the parameters of valve,shell and spring.we make a simulated calculation of engine testing's experimental data to analyze the transformation influence by convex platform parameter and throttle area after device.The results found that reducing the diameter of the convex platform or reducing the throttle area brings about reliable transformation.For the reason of strong impact on lubricating oil system.According to the simulation,reducing the valve convex platform of the air bleeding conversion device by 2 mm,it proves to be effective by the whole engine test.