Numerical solution of unsteady flow on airfoils with local membrane in transient and laminar flows

Unsteady flow separation on the airfoils with local flexible membrane (LFM) has been investigated in transient and laminar flows by the finitevolume element method. A unique feature of the present method compared with the common computational fluid dynamic softwares, especially ANSYSCFX, is the modification using the physical influence scheme in convection fluxes at cell surfaces. In contrary to the common softwares which usemathematical methods for discretization, this method considers the physical effects on approximation and discretization and thus increases the accuracy of solution and decreases the diffusion errors significantly. We have focused on the effects of deformation of the membrane on aerodynamic characteristics. For this purpose, first, we have solved the flow on NACA0012 airfoil in Reynolds number of 5000 and investigated the effects of local flexible membrane on aerodynamic coefficients in laminar flow. Then, we have solved the flow over LH37 airfoil in Reynolds number of 1.1×106 and studied the effects of flexible membrane on aerodynamic characteristics in transient flow. To calculate the Reynolds stress in turbulence equations, transient

Keywords:

Finite volume element , , Fluid solid interaction , Local flexible , membrane , , Low Reynolds number