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Viscous-shock-layer solutions with coupled radiation and ablation injection for earth entryResults are obtained for the forebody of a planetary exploration vehicle entering the earth's atmosphere. A viscous-shock-layer analysis is used assuming the flow to be laminar and in chemical equilibrium. Presented results include coupled radiation and ablation injection. This study further includes the effect of different transport and thermodynamic properties and radiation models. A Lewis number of 1.4 appears adequate for the radiation-dominated flows. Five velocities corresponding to different possible trajectory points at an altitude of 70 km have been further analyzed in detail. Sublimation and radiative equilibrium wall temperatures are employed for cases with and without coupled injection, respectively. For the cases analyzed here, the mass injection rates are small. However, the rates could become large if a lower altitude is used for aerobraking and/or the body size is increased. A comparison of the equilibrium results with finite-rate chemistry calculation shows the flowfield to be in chemical equilibrium.
Document ID
19900051345
Document Type
Conference Paper
Authors
Gupta, Roop N. (Scientific Research and Technology, Inc. Hampton, VA, United States)
Lee, Kam-Pui (Scientific Research Technology, Inc. Hampton, Va, United States)
Moos, James N. (Scientific Research and Technology, Inc. Hampton, VA, United States)
Sutton, Kenneth (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1990
Subject Category
AERODYNAMICS
Report/Patent Number
AIAA PAPER 90-1697
Distribution Limits
Public
Copyright
Other