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Presentation
Numerical Investigation on Charring Ablator Geometric Effects: Study of Stardust Sample Return Capsule Heat Shield
Proceedings of the 53rd AIAA Aerospace Sciences Meeting
  • Haoyue Weng, University of Kentucky
  • Alexandre Martin, University of Kentucky
Abstract

Sample geometry is very influential in small charring ablative articles where 1D assumption might not be accurate. In heat shield design, 1D is often assumed since the nose radius is much larger than the thickness of charring. Whether the 1D assumption is valid for the heat shield is unknown. Therefore, the geometric effects of Stardust sample return capsule heat shield are numerically studied using a material response program. The developed computer program models material charring, conductive heat transfer, surface energy balance, pyrolysis gas transport and orthotropic material properties in 3D Cartesian coordinates. Simulation results show that the centerline temperatures predicted by 3D model are quite close to 1D model at the surface, but not the case inside the material. The pyrolysis surface gas blowing behaviors are quite similar but differences are observed at later time. Orthotropic model predicted a very different heat shield response to both the isotropic model and the 1D model.

Document Type
Conference Proceeding
Publication Date
1-1-2015
Notes/Citation Information

Published in the Proceedings of the 53rd AIAA Aerospace Sciences Meeting, Paper 2015-0211, p. 1-14.

Copyright © 2015 by Haoyue Weng and Alexandre Martin.

The copyright holders have granted the permission for posting the article here.

Digital Object Identifier (DOI)
http://dx.doi.org/10.2514/6.2015-0211
Citation Information
Haoyue Weng and Alexandre Martin. "Numerical Investigation on Charring Ablator Geometric Effects: Study of Stardust Sample Return Capsule Heat Shield" Proceedings of the 53rd AIAA Aerospace Sciences Meeting (2015) p. 1 - 14
Available at: http://works.bepress.com/alexandre_martin/42/