INCOMPRESSIBLE NAVIER-STOKES COMPUTATION OF THE NREL AIRFOILS USING ASYMMETRICAL TOTAL VARIATIONAL DIMINISHING SCHEME

The purpose of this paper is to present a numerical study of flow fiel ds for the NREL S805 and S809 airfoils using a spatially second-order symmetric total variational diminishing scheme. The steady two-dimensi onal flow is modeled as turbulent, viscous, and incompressible and is formulated in the pseudo-compressible form. The turbulent flow is clos ed by the Baldwin-Lomax algebraic turbulence model. Numerical solution s are obtained by the implicit approximate-factorization method. The a ccuracy of the numerical results is compared with the Delft two-dimens ional wind tunnel test data. For comparison, the Eppler code results a re also included. Numerical solutions of pressure and lift coefficient s show good agreement with the experimental data, but not the drag coe fficients. To properly simulate the post-stall flow field, a better tu rbulence model should be used.