| Citation: | LIU Wei, ZHANG Yun. Sand ingestion test and performance degradation evaluation of turboshaft engine[J]. Journal of Aerospace Power, 2023, 38（1）：127-133 doi: 10.13224/j.cnki.jasp.20210283
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In order to grasp the effect of sand and dust erosion on the turboshaft engine, the differences and applicability of the sand ingestion test terms at home and abroad were analyzed. The sand ingestion test of a turboshaft engine was implemented and investigated. A rapid test data evaluation model of turboshaft engine was established based on the aero-thermodynamic equations and engine matching constraint. The method was used to evaluate the performance degradation of overall unit and components, which was validated using data from other references. The results indicated that the power and fuel consumption rate degradation presented a quadratic function law. The output power degradation was 10.2% and specific fuel consumption degradation was 3.2% after 10 h of sand ingestion. The chord length of the compressor first stage blade became shorter by 0.7%−3.4% and the thickness was reduced by 1.0%−3.0%, which resulted in the compressor flow rate decrease by 4.1%, the efficiency decrease by 3.1% and the pressure ratio decrease by 4.5%. The turbine cooling hole had slight blockage and ablation, the cooling air volume was reduced by 1.5%, and the gas turbine efficiency was reduced by 0.5%. The power turbine efficiency had a slight improvement due to blade smoothness.
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