Computational Investigation of Circulation Control Turbulence Modeling
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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A computational study of the turbulence model parameters and the effect on the flow field of a circulation control airfoil was conducted. A Beam- Warming algorithm with a modified Baldwin-Lomax turbulence model was used to solve the Navier-Stokes equations. A comparison between the effects of the Bradshaw constant on the flow field about the cylinder and the flow field about an airfoil were to be made. The lack of a steady converged solution for the cylinder precluded the analysis of the flow field about a cylinder. For the airfoil, the separation point moves rearward and an enhanced vortex pattern is developed as the Bradshaw constant is increased. Once a high enough value is reached, the curvature correction has minimal effect. The results obtained indicate that a better turbulence model must be employed before CFD can be used to accurately predict the flow around a circulation control airfoil.
- Fluid Mechanics