某型涡轴发动机吞鸟试验及验证

为研究吞鸟对涡轴发动机的影响,进行了3次吞鸟试验。在试验中,由气体炮将鸟射入发动机进气道,采用高速摄影仪记录鸟的运行轨迹和撞击部位及试验件形变过程。试验数据表明:在吞鸟过程中发动机各参数均大幅波动,持续时间约为3~4 s,波动过后,功率恢复时间约为5~9 s,各参数达到最终状态时间约为90~95 s;试验后发动机性能有衰减现象,清洗后有所恢复。经孔探和分解检查可知:鸟的残骸主要部分未进入发动机主流道,第1级压气机叶片卷曲变形。

Bird Ingestion Test and Verification of a Turboshaft Engine

To study the influence of bird ingestion on turboshaft engine, 3 bird ingestion tests were carried out. During the bird ingestion test, the birds were shot into air inlet duck by air cannons. Meanwhile, the highspeed photography equipment recorded the running path, the strike position of birds and the engine deformation process. The test data shows that engine parameters fluctuated by a large margin, the fluctuation continues about 3~4 second during the bird ingestion. And power recovering steady state needs about 5~9 seconds, but engine parameters reaching ultimately state needs about 90~95 seconds. After the test, there is decay of engine performance. However, engine performance get some recovery by washing. Through boresoope inspection and disassembly inspection, there isn't bird's remains in main channel. A blade of the primary compressor crimps and deforma.