LARGE-ANGLE-OF-ATTACK VISCOUS HYPERSONIC FLOWS OVER COMPLEX LIFTING CONFIGURATIONS

A new three-dimensional PNS scheme has been developed to study perfect-gas and equilibrium-air viscous hypersonic flows over complex three-dimensional configurations. This three-dimensional PNS scheme is unconditionally timelike in the subsonic as well as the supersonic flow regions and does not require any sublayer approximation. A predictor-corrector solution scheme and different grid-generation algorithms have been used along with an implicit shock-fitting scheme to predict the three-dimensional flowfields around some typical lifting configurations. A new fourth-order accurate smoothing approach has also been developed and used to enhance solution accuracy. The results show that substantial three-dimensional crossflow effects exist in the predicted flowfields, which need to be appropriately treated. Furthermore, the grid-generation result shows that for three-dimensional geometries with convex cross sections a slightly modified variation of a body-normal grid-generation scheme shows the best characterstics. The results also show that, for such complex configurations, the type of gas model used has a substantial effect on the predicted flowfield. © 1989 by VRA, Inc. © The American Institute of Aeronautics and Astronautics, Inc. All Rights Reserved.