Abstract
An algebraic turbulence eddy viscosity model has been implemented into a Navier-Stokes solver based on a length scale model coupled with the turbulent viscosity expression of the renormalization group theory of turbulence. A computational investigation has been conducted to determine the effect of the RNG-based algebraic turbulence model in predicting the flow characteristics of a low speed subsonic airfoil, a transonic airfoil, and two multi-element configurations. The domain about each multi-element airfoil is discretized with structured Chimera grids. The multi-element configurations presented in this paper include an airfoil with a slotted flap and an airfoil with a 50 percent chord vented aileron deflected 90 degrees. Subsonic flow computations axe performed for attached and separated flow conditions. The performance of the RNG based algebraic model is compared with that of the Baldwin-Lomax algebraic model and other one and two equation models. The performance of the turbulence model is evaluated based on comparisons with experimental data and other numerical results.
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