某型航空涡轴发动机吞砂试验研究

砂尘环境是航空发动机事故中常见且重要的诱发环境,因此,吞砂试验是新型发动机摸底和定型的重要试验项目。根据GJB 242-1987相关要求,通过设计投砂装置模拟真实砂尘环境,对某型航空涡轴发动机进行地面吞砂试验。试验结果表明:随着吞砂时间的增加,发动机功率衰减,耗油率增加,燃气涡轮出口总温有所提高;发动机性能在吞砂前2 h变化速率较快,随吞砂时间增加变化速率放缓。

Study on Sandswallow Test of an Aviation Turboshaft Engine

Sand dust environment is a common and important induced environment in aeroengine accidents. Therefore,sandswallow test is an important test project for knowing the real situation and finalizing the design of new engine.According to the requirements of GJB 242-1987,a sand swallow test was carried out on the ground of an aviation turboshaft engine by designing a sand throwing device to simulate the real sand dust environment.The test results show that with the increase of sand swallowing time,the engine power decreases,the fuel consumption rate increases,and the total temperature of gas turbine outlet increases. The engine performance changed rapidly 2 hours before sand swallowing,and slowed down with the increase of sand swallowing time.