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RESEARCH PAPERS

Volume Interchange Factors for Nonhomogeneous Gases

[+] Author and Article Information
D. K. Edwards, A. Balakrishnan

School of Engineering and Applied Science, University of California, Los Angeles, Calif.

J. Heat Transfer 94(2), 181-188 (May 01, 1972) (8 pages) doi:10.1115/1.3449891 History: Received April 20, 1971; Revised September 14, 1971; Online August 11, 2010

Abstract

Interchange factors describing the radiation heat transfer between two gas-volume elements or between one such element and a wall element are shown to be convenient for treating a variety of engineering problems, such as those involving combustion chambers, furnaces, and plumes. When the gas is not homogeneous in temperature, composition, or pressure, gas-volume interchange factors are found to be complex functions of the geometrical arrangement and the temperature, composition, and pressure fields which affect the radiant properties in the gas within and between the elements. A simplified expression is derived for the rapid calculation of such factors, and comparisons are made with exact numerical computations. Both take into account nongray spectral variations in gas properties. The case of adjoining elements is shown to require special treatment, and results are presented. Volume interchange factors and the machine time necessary to compute them are reported to demonstrate the relative ease with which such factors can be obtained using the approximations developed in this paper.

Copyright © 1972 by ASME
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