积垢厚度非均匀性对压气机叶栅气动性能影响

Three distribution forms of uniform fouling thickness，leading edge fouling thickness and trailing edge fouling thickness were established for the typical thickness distribution of compressor blade fouling，a diffuser cascade was taken as the research object，and numerical simulation was carried out to study the influences of different distribution forms and sizes of fouling on the degradation of aerodynamic performance of the compressor cascade. The results showed that the uniform fouling thickness overestimated the degradation of aerodynamic performance caused by the non-uniform thickness distribution of fouling on real compressor blades. The results of all three thickness distribution forms showed that the degradation of aerodynamic performance was more pronounced under negative incidence. Compared with the trailing edge fouling thickness， the effect of leading edge fouling thickness on aerodynamic performance degradation was more significant. When the maximum thickness of fouling was similar，the loss caused by the leading edge fouling thickness increased by 84.35% and the pressure ratio decreased by 0.98% compared with the trailing edge fouling thickness，which further illustrated the fact that the modelling of the compressor blade fouling should take into account its non-uniform distribution location and size to obtain more reliable results in the assessment of the aerodynamic performance degradation.