| Citation: | KOU Qihui, WANG Haifeng, JIANG Hongxin, et al. Multi-disciplinary optimization method for high-altitude propellers considering aero-structure[J]. Journal of Aerospace Power, 2024, 39（4）：20220344 doi: 10.13224/j.cnki.jasp.20220344
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To accomplish the trade-off design of high-altitude propellers with high efficiency and light mass, a multi-disciplinary and multi-objective optimization design method was proposed by considering both aero-structure of the propeller. Theoretically, Pareto solution set with the objective of maximum thrust and minimum mass can be obtained. However, in practical engineering applications, due to large amount of optimization variables, only the fitting trend of the Pareto solution set was obtained in acceptable time. To avoid overlong optimization period, the staged optimization approach was proposed. Stage 1: the optimal propeller diameter was decided by the Pareto solution set fitting trend and constraints; Stage 2: the aerodynamic shape was obtained by aerodynamic optimization based on the optimal propeller diameter; the structural scheme was obtained through structural optimization. This approach was used to optimize the propeller for a solar-powered unmanned aerial vehicle, the two stages took 96 h and 4 h, respectively, the propeller was manufactured, simulated and tested. The comparison results showed that the maximum thrust error was 10.9%, the mass error was 6.9%, the stiffness error was 15.2%, and the natural frequency error was 15.4%; so the test results also demonstrated its rationality and validity.
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