A Numerical Study on Premixed Bluff Body Flame of Different Bluff Apex Angle

Gelan Yang, Huixia Jin and Na Bai

Mathematical Problems in Engineering, 2013, vol. 2013, 1-9

Abstract:

In order to investigate effects of apex angle ( α ) on chemically reacting turbulent flow and thermal fields in a channel with a bluff body V-gutter flame holder, a numerical study has been carried out in this paper. With a basic geometry used in a previous experimental study, the apex angle was varied from 45° to 150°. Eddy dissipation concept (EDC) combustion model was used for air and propane premixed flame. LES-Smagorinsky model was selected for turbulence. The gird-dependent learning and numerical model verification were done. Both nonreactive and reactive conditions were analyzed and compared. The results show that as α increases, recirculation zone becomes bigger, and Strouhal number increases a little in nonreactive cases while decreases a little in reactive cases, and the increase of α makes the flame shape wider, which will increase the chamber volume heat release ratio and enhance the flame stability.

Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:272567

DOI: 10.1155/2013/272567

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