压气机流道中砂粒轨迹及碰撞位置的计算方法研究

Numerical Simulation of Compressor Flow Path and Trajectory of Sand Impact Position

飞机在砂尘地带工作时会吸入大量砂粒,砂粒进入核心机后会对叶片造成永久性的磨损,改变发动机的总体性能,对发动机造成极大损伤。通过建立碰撞反弹数据库,采用颗粒轨道模型,并调用已存入数据库中的气动参数,对砂粒在叶片通道中的飞行过程进行数值模拟,获得了砂粒在压气机流道中的运动轨迹及碰撞位置,为掌握影响砂粒在压气机内部的运动轨迹及其碰撞点位置提供研究方法,同时也为今后提高压气机叶片相应部位强度的研究提供理论依据。

When the aircraft works in the sand-dust zone,it can inhale a large amount of sands.When the sands enter into the core machine,it can wear down the blade,thus making the overall performance of the engine lowering.This paper establishes a collision bounce database,uses the particle orbit model,and calls the aerodynamic parameters already stored in the database,which are used to numerically simulate the flight process of the sand in the blade channel and obtain the trajectory and collision of the sand in the compressor flow channel.The research method and the theoretical basis are provided for mastering the movement trajectory of sand in the compressor and the location of the collision point,and improving the strength of the corresponding part of the compressor blade in the future.