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Numerical rebuilding of Viking afterbody radiative heating with the DLR TAU code

Potter, Daniel and Karl, Sebastian and Lambert, Markus (2012) Numerical rebuilding of Viking afterbody radiative heating with the DLR TAU code. 5th International Workshop on Radiation of High Temperature Gases in Atmospheric Entry , 15. - 18. Okt. 2012, Barcelona, Spanien. ISBN 978-92-9092-278-0 ISSN 1609-042X

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Abstract

Axisymmetric flowfield and radiation transfer solutions are presented for three trajectory points of the Viking spacecraft in its descent through the Martian atmosphere. The flow adapted hybrid grid capability of the TAU code has been implemented to calculate the flowfield surrounding the vehicle with a particular emphasis on accurately capturing the relevant wake flow structures while minimising the grid size. Laminar and turbulent calculations are found to give substantially different solutions in the wake region. A Monte-Carlo based radiation transport algorithm incorporating opacity binning of the spectra is applied to solve for both the radiative heating at the surface and divergence throughout the flowfield. While the calculated convective heating rate on the fibreglass portion of the back shell is similar to that derived from a thermocouple on the Viking spacecraft, the convective heating on the aluminium portion of the back shell is approximately half the thermocoupled-derived rate. In contrast, the radiative heating rates on the backshell are 2 to 6 times higher than the thermocouple-derived heating rates. Possible explanations for the overprediction of radiative heating are investigated.

Item URL in elib:https://elib.dlr.de/78875/
Document Type:Conference or Workshop Item (Speech, Paper)
Additional Information:December 2012
Title:Numerical rebuilding of Viking afterbody radiative heating with the DLR TAU code
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Potter, DanielUNSPECIFIEDUNSPECIFIED
Karl, SebastianUNSPECIFIEDUNSPECIFIED
Lambert, MarkusUNSPECIFIEDUNSPECIFIED
Date:2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Conference Proceedings on CD-ROM
ISSN:1609-042X
ISBN: 978-92-9092-278-0
Status:Published
Keywords:DLR TAU
Event Title:5th International Workshop on Radiation of High Temperature Gases in Atmospheric Entry
Event Location:Barcelona, Spanien
Event Type:international Conference
Event Dates:15. - 18. Okt. 2012
Organizer:European Space Agency, Noordwijk
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Numerische Verfahren und Simulation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Brennecke-Hosseinzadeh, Dagmar
Deposited On:25 Feb 2013 14:08
Last Modified:25 Feb 2013 14:08

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