Compressible Navier-Stokes Solutions over Low Reynolds Number Airfoils

Unsteady, laminar and turbulent, compressible and incompressible flow at low Reynolds numbers over a Wortmann FX63–137 airfoil is numerically modeled by solving the time-averaged two-dimensional compressible Navier-Stokes equations by means of the implicit central difference scheme of Beam-Warming. Recent improvements in efficiency, accuracy and convergence for the approximate factorization scheme are employed, including nonlinear artificial dissipation and refined body and farfield boundary conditions. C-type grids are generated by the hyperbolic grid generation technique. Turbulence is modeled by the modified algebraic turbulence model of Baldwin-Lomax and various transition criteria are tested. Results cover a range of test cases with Re ∞ =60,000 to 700,000 and M ∞ =0.01 to 0.5 for which experimental and computational results exist.

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