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Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 272567, 9 pages
http://dx.doi.org/10.1155/2013/272567
Research Article

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

1School of Information Science and Engineering, Hunan City University, Yiyang 413000, China
2School of Electronics and Communications Engineering, Hunan City University, Yiyang, China
3School of Electronics and Information Engineering, Anhui University, Hefei, China

Received 21 October 2012; Revised 28 January 2013; Accepted 28 January 2013

Academic Editor: Zhijun Zhang

Copyright © 2013 Gelan Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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.