Radiation heat transfer during hypersonic flight: A review of emissivity measurement and enhancement approaches of ultra‐high temperature ceramics

Autor: Abdullah A. Saad, Carlos Martinez, Rodney W. Trice
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: International Journal of Ceramic Engineering & Science, Vol 5, Iss 2, Pp n/a-n/a (2023)
Druh dokumentu: article
ISSN: 2578-3270
DOI: 10.1002/ces2.10171
Popis: Abstract Emissivity as a function of wavelength, direction, and temperature correlates to a material's efficiency in radiating thermal energy. Knowledge of emissivity is essential for designing and developing radiation‐cooled thermal protective systems for hypersonic applications. It is desirable to achieve a high emissivity (with a value close to 1) to maximize heat radiation from a hot surface of a hypersonic vehicle's leading edge during atmospheric re‐entry. With the goal of providing the hypersonic materials community with this necessary knowledge, this article offers a basic understanding of thermal radiation, methods for measuring emissivity at high temperatures, and a comprehensive overview of the emissivity of ultra‐high temperature ceramics.
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