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Emissitivity of hydrogen atoms at high temperature

Aroeste, Henry and Benton, William C. (1956) Emissitivity of hydrogen atoms at high temperature. Journal of Applied Physics, 27 (2). pp. 117-121. ISSN 0021-8979. doi:10.1063/1.1722319.

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A method is described for making estimates of the total emissivity of hydrogen in the temperature and pressure ranges where hydrogen atoms predominate under equilibrium conditions. For a typical geometrical depth of 50 cm, and temperatures of the order of 12 500ºK and higher, with pressures of the order of 100 atmos and higher, the emissivity approaches unity (є ≳ 0.95), while for temperatures of the order of 9500ºK and lower, with pressures of the order of 10 atmos and lower, the emissivity approaches zero (є ≾ 0.05). The variations of the emissivity between these approximate limits are shown graphically as functions of temperature and pressure with the geometrical depth set at 50 cm. The variation of the emissivity with geometrical depth is also shown graphically at 12 600ºK and 20 atmos.

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Additional Information:© 1956 American Institute of Physics. Received August 12, 1955. Online Publication Date: 14 May 2004. Supported by the Office of Naval Research under Contract Nonr-220(03), NR 015 401. Reproduction in whole or in part is permitted for any purpose of the United States Government. Previous publications of this series have been concerned with emissivity calculations on diatomic and polyatomic molecules [see S. S. Penner, J. Appl. Phys. 25, 660 (1954) and earlier papers]. This article uses, in part, the results of a thesis submitted by William C. Benton, Major, U. S. Marine Corps, in partial fulfillment of requirements for the degree of Aeronautical Engineer, California Institute of Technology, June, 1955.
Group:Guggenheim Jet Propulsion Center
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Office of Naval Research (ONR)Nonr-220(03), NR 015 401
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Guggenheim Jet Propulsion Center UNSPECIFIED
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Official Citation:Emissivity of Hydrogen Atoms at High Temperatures Henry Aroeste and William C. Benton J. Appl. Phys. 27, 117 (1956); doi:10.1063/1.1722319
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21764
Deposited By: Ruth Sustaita
Deposited On:14 Jan 2011 22:05
Last Modified:09 Nov 2021 16:00

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