Influence of chemical kinetics models on plasma generation in hypersonic flight. Sawicki, P., Chaudhry, R., S., & Boyd, I., D. In AIAA Scitech 2021 Forum, pages 1-16, 2021. American Institute of Aeronautics and Astronautics Inc, AIAA. ![Influence of chemical kinetics models on plasma generation in hypersonic flight [pdf]](https://bibbase.org/img/filetypes/pdf.svg "pdf")
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Website doi abstract bibtex The accuracy and sensitivity of plasma generation predicted by several different chemical kinetics models is investigated in the context of weakly ionized hypersonic flowfields around the RAM-C (Ra-dio Attenuation Measurement) vehicle. A computational fluid dynamics analysis is used to examine thirteen independent trajectory points along the RAM-C II flight and an assessment of the chemistry models is made by comparing results to available flight measurements. The limitations of making such comparisons with the flight data are established in detail. Two separate geometries are evaluated in this study, as the initial RAM-C geometry was altered during flight after its nose-cap was pyrotechnically ejected. The blunter post-ejection geometry generates more electrons in the stagnation region. In general, good agreement is found between each chemistry model and flight data from both the electrostatic probe and reflectometer stations above 56 km. An expected sizable gap exists between the simulations and reflectometer data at lower altitudes. The impact of forward reaction rates, equilibrium constants, and number of species varies considerably based on altitude, velocity, and position along the body. The commonly analyzed 61 km trajectory point provides a more direct comparison of the various chemistry models, but due care must be given to account for the interpola-tive nature of the reflectometer measurements.
@inproceedings{
title = {Influence of chemical kinetics models on plasma generation in hypersonic flight},
type = {inproceedings},
year = {2021},
pages = {1-16},
websites = {https://arc.aiaa.org/doi/abs/10.2514/6.2021-0057},
publisher = {American Institute of Aeronautics and Astronautics Inc, AIAA},
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created = {2021-08-31T00:22:34.211Z},
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hidden = {false},
citation_key = {sawicki:scitech:2021},
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abstract = {The accuracy and sensitivity of plasma generation predicted by several different chemical kinetics models is investigated in the context of weakly ionized hypersonic flowfields around the RAM-C (Ra-dio Attenuation Measurement) vehicle. A computational fluid dynamics analysis is used to examine thirteen independent trajectory points along the RAM-C II flight and an assessment of the chemistry models is made by comparing results to available flight measurements. The limitations of making such comparisons with the flight data are established in detail. Two separate geometries are evaluated in this study, as the initial RAM-C geometry was altered during flight after its nose-cap was pyrotechnically ejected. The blunter post-ejection geometry generates more electrons in the stagnation region. In general, good agreement is found between each chemistry model and flight data from both the electrostatic probe and reflectometer stations above 56 km. An expected sizable gap exists between the simulations and reflectometer data at lower altitudes. The impact of forward reaction rates, equilibrium constants, and number of species varies considerably based on altitude, velocity, and position along the body. The commonly analyzed 61 km trajectory point provides a more direct comparison of the various chemistry models, but due care must be given to account for the interpola-tive nature of the reflectometer measurements.},
bibtype = {inproceedings},
author = {Sawicki, Pawel and Chaudhry, Ross S. and Boyd, Iain D.},
doi = {10.2514/6.2021-0057},
booktitle = {AIAA Scitech 2021 Forum}
}
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