Study of high-lift configurations using k-zeta transition /turbulence model

The flow over the multi-element McDonnell Douglas configuration is computed using the k-zeta transition/turbulence model. The model is capable of calculating transition onset as part of the solution at a cost comparable to Navier-Stokes solvers that employ two-equation models. The model is first incorporated into CFL3D and then used to calculate flows for two angles of attack, 8 and 19 deg, at a freestream Mach number of 0.2 and a Reynolds number of 9 x 10 exp 6. In general, good agreement is indicated for predicting transition onset and velocity profiles over sections of the main airfoil and flap. Most of the differences between computation and experiment are in the prediction of the extent and penetration of the slat wake at the 19-deg angle-of-attack case. Even for this case relative differences were less than 5 percent. (Author)