Carbon ablative shock layer radiation with high surface temperatures

Lewis, Steven W., James, Christopher M., Morgan, Richard G., McIntyre, Timothy J., Alba, Christopher R. and Greendyke, Robert B. (2017) Carbon ablative shock layer radiation with high surface temperatures. Journal of Thermophysics and Heat Transfer, 31 1: 193-204. doi:10.2514/1.T4902


Author Lewis, Steven W.
James, Christopher M.
Morgan, Richard G.
McIntyre, Timothy J.
Alba, Christopher R.
Greendyke, Robert B.
Title Carbon ablative shock layer radiation with high surface temperatures
Journal name Journal of Thermophysics and Heat Transfer   Check publisher's open access policy
ISSN 0887-8722
1533-6808
Publication date 2017-01-01
Sub-type Article (original research)
DOI 10.2514/1.T4902
Open Access Status Not yet assessed
Volume 31
Issue 1
Start page 193
End page 204
Total pages 12
Place of publication Reston, VA, United States
Publisher American Institute of Aeronautics and Astronautics
Language eng
Formatted abstract
Despite the prominence of carbon-based materials for use in thermal protection systems, much uncertainty remains in predicting thermochemical ablation rates at high surface temperatures. To address this issue, experiments using preheated graphite models with surface temperatures up to 3300 K were conducted in the X2 expansion tunnel at the University of Queensland. Calibrated shock-layer emission measurements in the wavelength region from 353 to 391 nm were taken to observe the effect of surface temperature on radiation from the CN violet Δv=0 and Δv=+1 bands. Numerical simulations were conducted using US3D with modified Park as well as Zhluktov and Abe surface thermochemistry models. Lines of sight extracted from the flowfield data were simulated in NEQAIR to reproduce the experimental radiance profiles. It was found that the experimental CN radiance showed no significant dependence on surface temperature, whereas the numerical simulations predicted a monotonic increase with temperature for all surface models. Several potential mechanisms for these discrepancies have been identified and discussed.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Print issue is January-March 2017

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
School of Mechanical & Mining Engineering Publications
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Created: Tue, 18 Jul 2017, 09:09:42 EST by Steven Lewis on behalf of School of Mechanical and Mining Engineering