Boundary-Layer Thermochemical Analysis During Passive and Active Oxidation of Silicon Carbide. Chen, S. Y. & Boyd, I. D. Journal of Thermophysics and Heat Transfer, 34(3):504–515, 2020. Publisher: American Institute of Aeronautics and Astronautics _eprint: https://doi.org/10.2514/1.T5864doi abstract bibtex Silicon carbide is an ultra-high-temperature ceramic proposed for hypersonic flight applications. However, its use is limited at conditions where oxidation causes aggressive material degradation and a surface temperature “jump” phenomenon. Oxidation is a coupled process, depending on both boundary layer and surface chemistry. An equilibrium surface chemistry model for silicon carbide oxidation is coupled to a nonequilibrium computational fluid dynamics framework, accounting for gas–surface reactions, blowing of oxidation products, and a detailed surface energy balance. Boundary-layer analyses demonstrate a 20–40% increase in the chemical diffusive heating during passive-to-active transition, and predicted steady-state temperatures agree with experimental measurements within 3%. Simulated emission spectra show good qualitative agreement with spectra measured in high-enthalpy experiments.
@article{chen_boundary-layer_2020,
title = {Boundary-{Layer} {Thermochemical} {Analysis} {During} {Passive} and {Active} {Oxidation} of {Silicon} {Carbide}},
volume = {34},
issn = {0887-8722},
doi = {10.2514/1.T5864},
abstract = {Silicon carbide is an ultra-high-temperature ceramic proposed for hypersonic flight applications. However, its use is limited at conditions where oxidation causes aggressive material degradation and a surface temperature “jump” phenomenon. Oxidation is a coupled process, depending on both boundary layer and surface chemistry. An equilibrium surface chemistry model for silicon carbide oxidation is coupled to a nonequilibrium computational fluid dynamics framework, accounting for gas–surface reactions, blowing of oxidation products, and a detailed surface energy balance. Boundary-layer analyses demonstrate a 20–40\% increase in the chemical diffusive heating during passive-to-active transition, and predicted steady-state temperatures agree with experimental measurements within 3\%. Simulated emission spectra show good qualitative agreement with spectra measured in high-enthalpy experiments.},
number = {3},
urldate = {2023-10-09},
journal = {Journal of Thermophysics and Heat Transfer},
author = {Chen, Samuel Y. and Boyd, Iain D.},
year = {2020},
note = {Publisher: American Institute of Aeronautics and Astronautics
\_eprint: https://doi.org/10.2514/1.T5864},
pages = {504--515},
}
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