| Citation: | JI Tianyuan, CHU Wuli, ZHANG Zhenhua, et al. Uncertainty analysis of impact of blade thickness deviation on rotor performance[J]. Journal of Aerospace Power, 2024, 39（11）：20220203 doi: 10.13224/j.cnki.jasp.20220203
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In order to study the impact of blade thickness deviation on rotor performance, the Rotor37 was taken as the research object and non-intrusive polynomial chaos was used as uncertainty quantification method to evaluate the uncertainty impact of blade thickness deviation on rotor aerodynamic performance and flow field structure. The results showed that for the blade group with symmetric probability distribution of thickness deviation and mean value of 0, the average level of aerodynamic performance almost unchanged compared with the prototype blade, and the fluctuation degree of aerodynamic parameters was positively correlated with the standard deviation of the thickness deviation probability distribution. The linear correlation between rotor performance change and thickness deviation was strong when machining accuracy was higher. In the meantime, the impact of thickness deviation of blade suction and pressure surface on rotor aerodynamic performance was obviously different. The suction surface thickness deviation had a greater impact on isentropic efficiency and mass flow rate, while the thickness deviation of pressure surface had a more obvious impact on the total pressure ratio characteristics of rotor, and the uncertain impacts of these two on rotor performance alone were partially cancelled out when they worked together.
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