Gas Surface Interactions Lab

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New journal article!

March 15th, 2017

New article in Aerospace Science and Technology!

Accurate thermodynamic properties for species found in carbon-phenolic gas mixtures are essential in predicting material response and heating of carbon-phenolic heat shields of planetary entry vehicles. A review of available thermodynamic data for species found in mixtures of carbon-phenolic pyrolysis and ablation gases and atmospheres rich with C, H, O, and N such as those of Earth, Mars, Titan, and Venus, is performed. Over 1200 unique chemical species are identified from four widely used thermodynamic databases and a systematic procedure is described for combining these data into a comprehensive model. The detailed dataset is then compared with the Chemical Equilibrium with Applications thermodynamic database developed by NASA in order to quantify the differences in equilibrium thermodynamic properties obtained with the two databases. In addition, a consistent reduction methodology using the mixture thermodynamic properties as an objective function is developed to generate reduced species sets for a variety of temperature, pressure, and elemental composition spaces. It is found that 32 and 23 species are required to model carbon-phenolic pyrolysis gases mixed with air and CO2, respectively, to maintain a maximum error in thermodynamic quantities below 10%.

[1] Scoggins, J. B., Rabinovich, J., Barros-Fernandez, B., Martin, A., Lachaud, J. R., Jaffe, R. L., Mansour, N. N., Blanquart, G., and Magin, T. E., “Thermodynamic properties of equilibrium carbon-phenolic gas mixtures,” Aerospace Science and Technology, Vol. 66, 2017.
DOI:10.1016/j.ast.2017.02.025

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9th Ablation Workshop

March 2nd, 2017

Save-the-date! The 9th Ablation Workshop will be held August 30-31, 2017 at Montana State University in beautiful Bozeman, Montana, not far from Yellowstone National Park! The local organizer will be Prof. Tim Minton (Montana State University), and the co-organizer will be Prof. Alexandre Martin (University of Kentucky). E-mail updates in the coming months will provide reminders about abstract submission, registration, and accommodations. As always, you should also keep an eye on the website (http://ablation2017.engineering.uky.edu) for detailed information. Note that the main two-day meeting will NOT be ITAR restricted, but we plan on having an additional morning session on September 1st for ITAR presentations. If you have any questions, please do not hesitate to contact one of us.

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