| Citation: | WANG R C，ZHANG G X，WANG X Y，et al. Aerodynamic performance analysis of supercritical airfoil with lower surface jet[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（7）：1671-1679 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0489
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To investigate the influence of key parameters of the lower surface jet on aerodynamic performance of supercritical airfoil, a numerical simulation is performed using Reynolds average Navier-Stokes (RANS) equation and Spalart-Allmaras (S-A) turbulence model. By comparing the flow field between the benchmark RAE2822 airfoil and the lower surface jet airfoil, the lower surface jet induces a counterclockwise separation vortex at the trailing edge of the airfoil, deflecting the streamlines downward. This deflection increases the equivalent camber of the airfoil and the suction peak of the leading edge, leading to the aerodynamic performance enhancement of the airfoil. The effects of key parameters such as the jet position, the jet momentum coefficient, the jet angle and the Mach number on the aerodynamic performance of RAE2822 airfoil are explored. The results show that under given conditions, the closer the lower surface jet is to the trailing edge and the greater the momentum coefficient is, the better the aerodynamic performance of the airfoil. The optimal angle of the lower surface jet is 110° at
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