Large Eddy Simulation of Coflow Jet Airfoil at High Angle of Attack

Abstract

Large eddy simulation (LES) is conducted to investigate coflow jet (CFJ) airfoil flows at high angle of attack (AOA). The Smagorinsky model with Van Driest damping is employed to resolve the subgridscale stress. The fifthorder weighted essentially nonoscillatory (WENO) scheme is used for reconstruction of the inviscid flux and the fourthorder central differencing for the viscous flux. The LES results at an AOA of 0 deg, 12 deg, 25 deg, and 30 deg with momentum coefficients of Cخ¼â€‰= 0.15 and 0.08 are compared with the experiment to understand the flow structure of the jet mixing and flow separation. The quantitative prediction of lift and drag and qualitative prediction of vortex structures are in good agreement with experiment.