Over the past several years significant interest has been generated in three-dimensional flowfield analyses of lifting reentry vehicles. The parabolized navier-stokes (PNS) schemes are elliptic in the crossflow direction and can treat regions of crossflow separation. The present non-iterative AFWAL PNS scheme suffers from quite a few limitations and restrictions; however, the new fully-iterative PNS scheme of Bhutta and Lewis successfully resolves several of the problems inherent in the present non-iterative AFWAL PNS scheme. In phase I of the proposed two-phase effort, we will extend the noniterative perfect-gas AFWAL PNS scheme to accurately predict equilibrium-air flowfields around realistic reentry configurations. In phase II of this effort, we propose to extend the recent axisymmetric fully-iterative perfect-gas PNS scheme to Bhutta and Lewis, and provide the air force with the code to study three-dimensional perfect gas/equilibrium-air flowfield around ballistic and lifting reentry vehicles.
