Radiation Heat Transfer in Nonisothermal Nongray Gases

[+] Author and Article Information
D. K. Edwards

University of California, Los Angeles, Calif.

L. K. Glassen

Aeronutronic Division of Philco Corp., Newport Beach, Calif.

W. C. Hauser

Engineering, R. O. Roberts, Inc., Santa Fe Springs, Calif.

J. S. Tuchscher

Hughes Aircraft Co., Culver City, Calif.

J. Heat Transfer 89(3), 219-228 (Aug 01, 1967) (10 pages) doi:10.1115/1.3614362 History: Received May 26, 1966; Online August 25, 2011


Experimental measurements of absorption and emission by nonisothermal CO2 and H2 O gases are reported. Analytical formulations and calculations of radiant heat transfer using a simple nongray gas model are presented. It is found that a gray gas model cannot predict even qualitatively the experimental results, while the band model method of calculation yields results in quantitative agreement for total emission and absorption in a band. Effects of line structure are shown to be of secondary importance compared to band envelope structure for line-width-to-spacing ratios above 10−2 in saturated bands. An analytical solution for coupled convection and radiation in a plane-parallel-wall duct is derived to illustrate the utility of the exponential band model for analysis of radiant transfer in nonisothermal, nongray gases.

Copyright © 1967 by ASME
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