Fire Plume Along Vertical Surfaces: Effect of Finite-Rate Chemical Reactions

[+] Author and Article Information
C. H. Chen, J. S. T’ien

Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106

J. Heat Transfer 106(4), 713-720 (Nov 01, 1984) (8 pages) doi:10.1115/1.3246743 History: Received October 04, 1983; Online October 20, 2009


Fire plume along a vertical wall is analyzed using a laminar boundary layer model, including finite-rate, gas-phase chemical kinetics. The chemical reactions include two semiglobal steps: In the first, fuel is oxidized to form carbon monoxide and water vapor, and in the second, carbon monoxide is oxidized to form carbon dioxide. Several important nondimensional kinetic parameters are identified and a parametric study is given. The computed results indicate that by slowing down the relative kinetic rates in the gas-phase reactions, the total surface heat transfer rate and the preheating distance are decreased. Furthermore, slowing down the kinetics also increases the amount of unreacted combustibles that escape from the flame.

Copyright © 1984 by ASME
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