PNS predictions of axisymmetric hypersonic blunt-body and afterbody flowfieldsA new space-marching full-body PNS algorithm capable of treating the complete blunt-body and afterbody flowfields over typical wide-bodied configurations is developed and demonstrated. A hybrid differencing scheme involving Flux-Vector Splitting (FVS) across embedded shocks and flowfield discontinuities, and central differencing in smooth (shock-free) regions is used. It is demonstrated that this new full-body PNS scheme can be marched from the spherical stagnation point over the entire body using bow-shock capturing, and provides an efficient and effective way for predicting blunt-body flowfields for various reentry application. The Mach 20 flow over a 30-deg sphere cone is predicted and comparisons are made with an existing VSL scheme for the blunt-body region and an existing PNS scheme for the conical afterbody region. The predicted flowfield and surface-measurable quantities are in excellent agreement, and demonstrate the accuracy and efficiency of the new full-body PNS scheme.
Document ID
19930062482
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bhutta, Bilal A. (NASA Langley Research Center Hampton, VA, United States)
Lewis, Clark H. (VRA, Inc. Blacksburg, VA, United States)