RANS/IB simulation of oscillating airfoil based on wall model and dynamic mesh adaptation technique
To improve the efficiency of the oscillating airfoil flow calculation method,a non-boundary-coordinate method based on a wall model and a dynamic mesh adaptation technique is proposed.The flow field is calculated using Reynolds-averaged Navier-Stokes(RANS)equations,and the airfoil boundary is treated with an immersed boundary(IB)method,which allows the moving-boundary flows to be simulated on a stationary mesh.To alleviate the mesh interval requirement in the near-wall region for RANS/IB simulation of high-Reynolds-number turbulent flows,a two-layer wall model is adopted.A dynamic mesh adaptation technique is employed to encrypt the region with large vortex,so that the shedding vortex can be captured accurately and the numerical accuracy can be improved.Even at large grid scale,the predicted mean lift(moment)coefficient,energy harves-ting efficiency and surface force(moment)coefficient distribution of NACA0015 oscillating airfoil simulated by RANS/IB method are in agreement with the literature results.The developed method in this paper can provide important reference for the design of oscillating airfoil capacitive device.
万方数据
维普
