实验室砂尘颗粒冲蚀-腐蚀交替试验技术研究进展

Research progress on sand particle erosion-A corrosion alternative laboratory test method

调研了砂尘环境、砂尘颗粒冲蚀相关的试验方法,着重对比砂尘流高速冲击试样方法的相同点和主要区别,确定了喷磨试验方法更适合开展压气机叶片、风扇叶片的冲蚀试验研究。冲蚀试验设计采用GJB 241A—2010、GJB 242A—2018所示成分和粒度的砂尘,通过控制送砂速率和试验时间达到实际服役中压气机转子叶片、风扇叶片的砂尘作用量,当量发动机使用1年的砂尘冲刷环境。另外,采用砂尘颗粒冲蚀试验与GJB 150.11A—2009盐雾试验交替的方案更贴近实际环境。

Compressor blades and fan blades of aero engine encounter the blasting load from sand particles during service,as well as the influence of temperature,humidity and air pollution.In this paper,test methods related to sand environment and sand particle erosion are investigated,with emphasis on the common and difference of these methods using high speed sand stream to impact on samples.Gas jet test is chosen as a proper method to carry out erosion test and research for compressor blade and fan blade.An erosion method is designed according to the sand composition and particle size listed in GJB 241A-2010,GJB 242A-2018.Sand feeding rate and testing time are controlled so as to meet the sand mass loads of compressor blade and fan blade in real service.The sand mass load is equivalent to the sand blast environment for aero engine in 1 year.Sand particle erosion testing and GJB 150.11A-2009 salt fog testing are carried out alternatively so that the testing scheme is closer to real service condition.Such methods may provide a technique foundation for aero engine compressor blade and fan blade to establish damage evolution rules and models considering the effect of corrosion environment and erosion load.