Title: Computation of radiative and convective contributions to Viking afterbody heating
Abstract: This paper investigates the hypothesis that the observered gap between CFD and
thermocouple-derived flight measurements for afterbody heating of the Viking spacecraft
can be accounted for by infrared radiation from CO2 molecules in the wake flow. The DLR
TAU code is implemented to simulate the Viking I spacecraft at an altitude of 37.4km on a
flow-adapted hybrid 3D grid with radiation- flowfield coupling. The radiation spectrum of
the CO2 molecule is represented by a statistical narrow band model and radiation transport
is calculated via an opacity-binned ray-tracing model. The calculated total heating level on
the aluminium base cover is in good agreement with the flight data, while the total heating
level for the fiberglass cover is overpredicted. Furthermore, radiation-flowfield coupling is
found to reduce the total heat flux on the vehicle surface by up to 10% compared to when
radiation is treated in an uncoupled manner.
Publication Year: 2013
Publication Date: 2013-06-22
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 14
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot