| Citation: | LIU Shuaipeng, GENG Shaojuan, JIN Yun, et al. Supersonic and transonic airfoil optimization design based on superimposing thickness on suction surface[J]. Journal of Aerospace Power, 2024, 39（5）：20210577 doi: 10.13224/j.cnki.jasp.20210577
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To improve the optimization design quality of axial compressor airfoil, the parametric modeling method based on superimposing thickness on suction surface was proposed. The compressor airfoil optimization platform based on Kriging surrogate model and Differential Evolution algorithms was developed, and the control parameters of the suction surface were used as optimization variables to optimize the performance of transonic and supersonic airfoils. The results showed that the parametric modeling method based on superposing thickness distribution on suction surface can express the airfoil well and was successfully applied to the optimization design platform. The loss of optimized transonic and supersonic airfoils at design condition decreased by 10.66 % and 7.4%, respectively. The analysis showed that as for the main characteristics of optimized transonic airfoil, the curvature of the profile near the leading edge of suction surface decreased, and the shock wave intensity decreased. Therefore, the shock wave loss and boundary layer loss decreased, the load at the middle and rear positions increased and the expansion capacity of the expansion channel increased. The optimization of supersonic airfoil should consider the profile of suction surface within the aft expansion passage additionally, because of more significant boundary layer influence. The position and width of throat can affect the chocking incidence angle.
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