| Citation: | MO Yuqin, CHU Wuli, LIU Kaiye, et al. Uncertainty research on effects of position deviation on aerodynamic performance of rotor[J]. Journal of Aerospace Power, 2025, 40（4）：20230477 doi: 10.13224/j.cnki.jasp.20230477
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In order to study the influence of position deviation on the aerodynamic performance of rotor, Rotor 37 was taken as the research object and the non-intrusive polynomial chaos method was used as uncertainty quantification to evaluate the uncertainty effect of position deviation on rotor aerodynamic performance and flow field structure. Results showed that: the position deviation had almost no effect on the average level of aerodynamic performance of rotor under the condition of equal backpressure, and the aerodynamic performance of each working condition was approximately normally distributed; the aerodynamic performance of rotor was more significantly affected by the axial position deviation, and there was a highly correlated linear relationship between them. When the position deviation increased along the axial direction, it made the performance curve shift towards the direction of flow rate decrease, changing the flow range of compressor stable operation; under the condition of reference peak efficiency, the axial position deviation could affect the position and intensity of the shock wave at the tip of the blade, which may affect the working ability of the blade, then affect the total pressure ratio and the wave resistance loss and shock wave-boundary layer interaction loss, and then affect the isentropic efficiency.
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