What is it about?
Conference version of the HEG cylinder study later published in JTHT. FUN3D on the HEG cylinder at about 22 MJ/kg and Mach 9, with a 38-reaction, five-species air model (ab initio dissociation and exchange, Dunn–Kang recombination). A two-stage global sensitivity analysis, implemented in Julia, screens the rates that control stagnation heating, then Sobol-decomposes the Arrhenius parameters. Calibration brings the heat flux in line with the experiment, where Park/Dunn–Kang underpredict.
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Why is it important?
It put the ab initio rate set and the Julia GSA/UQ pipeline in front of the SciTech audience months before the journal article. The conference claim is that first-principles kinetics plus UQ can close a long-standing high-enthalpy heating gap.
Perspectives
Treat this as the conference snapshot. For the HEG I vs HEG III contrast and the recombination-versus-catalycity argument, use the JTHT paper.
Zach Davis
Space Dynamics Laboratory
Read the Original
This page is a summary of: Investigation of a High Enthalpy Cylinder Flow Using Ab Initio Air Chemistry Data, January 2026, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2026-1468.
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