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首页> 外文期刊>Mathematical Problems in Engineering >A Numerical Study on Premixed Bluff Body Flame of Different Bluff Apex Angle
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A Numerical Study on Premixed Bluff Body Flame of Different Bluff Apex Angle

机译：不同钝顶角预混钝体火焰的数值研究

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摘要

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 a 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.
机译：为了研究顶角（α）对带有钝体V型槽火焰支架的通道中化学反应湍流和热场的影响，本文进行了数值研究。通过先前实验研究中使用的基本几何形状，顶角从45°更改为150°。涡流消散概念（EDC）燃烧模型用于空气和丙烷的预混火焰。选择LES-Smagorinsky模型作为湍流。进行了与电网有关的学习和数值模型验证。分析和比较了非反应性和反应性条件。结果表明，随着反应量的增加，在非反应性情况下，回流区变大，斯特劳哈尔数增加，而在反应性情况下，Strouhal数减少，并且α的增加使火焰形状变宽，这将增加腔室容积的放热率并增强火焰稳定性。

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  • 来源
    《Mathematical Problems in Engineering》 |2013年第3期|272567.1-272567.9|共9页
  • 作者

    Gelan Yang; Huixia Jin; Na Bai;

  • 作者单位

    School of Information Science and Engineering, Hunan City University, Yiyang 413000, China;

    School of Electronics and Communications Engineering, Hunan City University, Yiyang, China;

    School of Electronics and Information Engineering, Anhui University, Hefei, China;

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