Simulations are performed in collaboration with inductively coupled plasma torch experiments to investigate gas-phase chemical kinetics in the boundary layer of a pyrolyzing ablator. A gas injection probe delivers or into plasma mixtures of , and emission spectroscopy provides absolute, spatially, and spectrally resolved measurements of the radiative emission in the boundary layer. A computational model of the plasma flow in the Inductively Coupled Plasma facility was used with finite rate chemistry mechanisms, and line-of-sight emission spectra were computed from the results to assess the accuracy of the chemistry mechanisms. The –air and –air chemistries were examined, and CN emission levels were overpredicted by a factor of 3–4, whereas OH emission was underpredicted by a factor of 2. Sensitivity analyses show that uncertainty in the experimental temperature accounts for much of the discrepancy.
Modeling of Emission Spectra in Nonequilibrium Plasmas for Testing Pyrolyzing Ablators
Journal of Thermophysics and Heat Transfer ; 33 , 4 ; 907-916
2019-05-20
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Two-Dimensional Ablation, Thermal Response, and Sizing Program for Pyrolyzing Ablators
British Library Conference Proceedings | 2008
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