Numerical model for circulation-control flows

Current computational models for circulation-control flows have been applied, in most cases, to elliptical airfoils having only one blowing slot. We describe a two-dimensional Navier-Stokes solver that has been developed for modeling the flowfields of a circular airfoil with two jets. In its original form, the Baldwin-Lomax algebraic turbulence model is shown to be inadequate for describing compound boundary layers such as those produced by the wall jet. A new turbulence model is therefore proposed. To account for the nonequilibrium production of turbulence at the slot exits and for its suppression due to wall curvature, two corrections to the turbulence model were implemented