Aerodynamic Investigation of RAE2822 Airfoil in Ground Effect

AbstractThe aerodynamic characteristics of RAE2822 in ground effect were investigated with finite volume method (FVM) based on the averaged Navier-Stokes equations. The performance of several eddy-viscosity turbulence models were assessed by comparing with the available experimental data of NACA4412 in ground effect. Realizable k-epsilon model demonstrates with good capability of predicting the flow characteristics. In study of the ground effect on supercritical airfoil RAE2822, high lift and ratio of lift and drag only could be achieved in medium angle of attack (AOA). The ground effect would induce the upfront separation of boundary layer on the airfoil. In study of the ground boundary condition and compressibility effect, these factors all show significant impact on the aerodynamic characteristics of RAE2822 in ground effect, which should be considered in numerical or experimental studies