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http://dx.doi.org/10.7731/KIFSE.2013.27.6.064

Numerical Study on the Reacting Flow Field abound Rectangular Cross Section Bluff Body  

Lee, Jung-Ran (Department of Safety Engineering, Pukyong National University)
Lee, Eui-Ju (Department of Safety Engineering, Pukyong National University)
Publication Information
Fire Science and Engineering / v.27, no.6, 2013 , pp. 64-69 More about this Journal
Abstract
The Numerical simulation was performed on the flow field around the two-dimensional rectangular bluff body in order to simulate an engine nacelle fire and to complement the previous experimental results of the bluff body stabilized flames. Fire Dynamic Simulator (FDS) based on the Direct Numerical Simulation (DNS) was employed to clarify the characteristics of reacting flow around bluff body. The overall reaction was considered and the constant for reaction was determined from flame extinction limits of experimental results. The air used atmosphere and the fuel used methane. For both fuel ejection configurations against an oxidizer stream, the flame stability and flame mode were affected mainly by vortex structure near bluff body. In the coflow configuration, air velocity at the flame extinction limit are increased with fuel velocity, which is comparable to the experiment results. Comparing with the isothermal flow field, the reacting flow produces a weak and small recirculation zone, which is result in the reductions of density and momentum due to temperature increase by reaction in the wake zone.
Keywords
Bluff body; Flame stability; Wake; DNS; FDS;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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