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RESEARCH PAPERS

Flame Propagation Through Atmospheres Involving Concentration Gradients Formed by Mass Transfer Phenomena

[+] Author and Article Information
G. A. Karim

Department of Mechanical Engineering, University of Calgary, Calgary, Alberta, Canada

P. Tsang

Underwood McLellan & Associates Ltd., Calgary, Alberta, Canada

J. Fluids Eng 97(4), 615-617 (Dec 01, 1975) (3 pages) doi:10.1115/1.3448144 History: Received October 09, 1975; Online October 12, 2010

Abstract

The purpose of the present work is to establish experimentally the nature of the phenomena and the rate of fire spread through explosive media involving concentration gradients in a fuel-air mixture. Most of the work reported has been limited to upward flame propagation using methane as a fuel. Wide deviations from the quasi-steady approach were observed when a flame propagates along a negative concentration gradient in lean methane-air mixtures. It appears that the observed rate of fire spread in stratified lean mixtures can be correlated directly in terms of local concentration gradients and the corresponding propagation rates under homogeneous conditions.

Copyright © 1975 by ASME
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