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http://dx.doi.org/10.15231/jksc.2015.20.4.019

Stabilization of Inert-Gas-Diluted Co-Flow Diffusion Flame by a Pilot Flame  

Ahn, Taekook (Department of Mechanical Engineering, Dankook University)
Lee, Wonnam (Department of Mechanical Engineering, Dankook University)
Park, Sunho (Department of Mechanical Engineering, Dankook University)
Publication Information
Journal of the Korean Society of Combustion / v.20, no.4, 2015 , pp. 19-25 More about this Journal
Abstract
An experimental study was conducted to find the effect of a pilot flame on the flammability of inert-gas-diluted methane and propane. The diffusion pilot flame was formed with propane at the innermost nozzle of a concentric triple co-flow burner. The main diffusion flame was formed with nitrogen-diluted methane or propane at the outermost nozzle of the burner. An air flow was located in-between. The results showed that the existence of the pilot flame helped stabilizing the main flame even at the flammability limit concentration of nitrogen-diluted fuel. The co-flow burner generated re-circulation zones and local variation of equivalence ratio depending on the flow rates of the reactants, which are known to help flame stabilization. Hot-wire experiments confirmed that both heating of the reactants and supplying of active chemical species by the pilot flame contributed to stabilization of the main flame. The results of this study would suggest a design concept for an efficient SVRU system that minimizes the emission of unburned hydrocarbon fuel from ship fuel tanks.
Keywords
Flame stabilization; Pilot flame; Co-flow burner; Flammability limit; Inert gas dilution; SVRU;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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