Numerical investigation of dynamic stall phenomenon on a plunging airfoil

Abstract

The unsteady separated turbulent flow around an oscillating airfoil plunging in a sinusoidal pattern in the regime of low Reynolds number is investigated numerically, employing the URANS approach with advanced turbulence model, k-ωSST transitional. A comparison with experimental data shows that the Transition SST model is capable of predicting the flow characteristics for the increasing cycle while the main difficulty lies in the accurate modeling of the complicated separated flows during the decreasing stroke. The flow development of the dynamic stall is also discussed. © 2011 WIT Press.