Prediction of supersonic/hypersonic viscous flows over re-entry vehicles and decoys

Autor:	Bilal A. Bhutta, Clark H. Lewis
Rok vydání:	1990
Předmět:	Physics Hypersonic speed Angle of attack Turbulence modeling Aerospace Engineering Mechanics Perfect gas Physics::Fluid Dynamics Classical mechanics Space and Planetary Science Robustness (computer science) Supersonic speed Bow shock (aerodynamics) Conservation of mass
Zdroj:	Journal of Spacecraft and Rockets. 27:493-502
ISSN:	1533-6794 0022-4650
DOI:	10.2514/3.26171
Popis:	In this paper we discuss the background and applications of a new unified series of codes for predicting large angle-of-attack viscous supersonic/hypersonic flows over spherically blunt re-entry vehicles and decoys. The solution scheme used involves a viscous shock-layer code for the blunt nose region, whereas a new parabolized Navier-Stokes (PNS) technique is used for the afterbody region. This new three-dimensional PNS scheme is unconditionally time-like and does not require the use of any sublayer approximation. A new predictor-corrector solution technique has been used along with a new fully-implicit and crossflow-coupled shock-fitting procedure to address the large angle-of-attack problem and to predict the bow shock location as a part of the marching solution. Several test cases are presented for various multiconic geometries under zero and nonzero angles of attack. The results of these test cases are used to demonstrate the accuracy, efficiency, and robustness of the unified viscous shock-layer (VSL) and PNS solution scheme.
Databáze:	OpenAIRE
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