东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (9): 1273-1276.DOI: -

• 材料与冶金 • 上一篇    下一篇

过滤燃烧火焰锋面不稳定性的实验研究

薛治家1,于庆波1,刘慧1,史俊瑞2   

  1. (1.东北大学材料与冶金学院,辽宁沈阳110819;2.沈阳工程学院能源与动力工程学院,辽宁沈阳110136)
  • 收稿日期:2013-02-20 修回日期:2013-02-20 出版日期:2013-09-15 发布日期:2013-04-22
  • 通讯作者: 薛治家
  • 作者简介:薛治家(1982-),男,黑龙江尚志人,东北大学博士研究生;于庆波(1966-),男,山东莱阳人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51076109,51176026);中央高校基本科研业务费专项资金资助项目(N110302004);辽宁省高等学校优秀人才支持计划项目(LJQ2011135,LR201029).

Experimental Studies on the Flame Front Instability Characteristics in Filtration Combustion

XUE Zhijia1, YU Qingbo1, LIU Hui1, SHI Junrui2   

  1. 1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China; 2. Energy and Power Engineering Institute, Shenyang Institute of Engineering, Shenyang 110136, China.
  • Received:2013-02-20 Revised:2013-02-20 Online:2013-09-15 Published:2013-04-22
  • Contact: YU Qingbo
  • About author:-
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摘要: 实验研究甲烷/空气预混气体在多孔介质燃烧器中燃烧的火焰锋面不稳定特性.结果表明,给定一个初始非均匀预热区域,在当量比为041,流速为042m/s时,在6mm的小球填充床内,火焰锋面由较为规则的对称火焰逐渐演变为倾斜火焰,并最终分裂为上下两个区域.在布置填充床的同时,对填充床进行夯实,降低孔隙率分布不均匀性.在孔隙率均匀的填充床内,初始的非均匀预热区域,使得火焰的传播极其不稳定,最终导致熄火;即使给定初始均匀的预热区域,火焰锋面依然具有一定的不对称性.填充床的结构不均性是过滤燃烧火焰锋面倾斜的主要原因,而初始的不均匀因素将加剧火焰传播的不稳定性.

关键词: 多孔介质, 过滤燃烧, 火焰传播, 不稳定, 实验研究

Abstract: The flame front instability characteristics of the combustion of the methane/air premixed gas in the porous media burner were investigated. The experiment results showed that in a particle bed with the ball diameter of 6mm, the flame front changes from the regular symmetrical flame to the inclined flame gradually and split into two areas finally in a given initial uneven preheated zone when the equivalent ratio is 041, and the flow velocity is 042m/s. When the particle bed was arranged, the balls were tamped down to decrease the uneven distribution of porosity. The initially uneven preheated areas in the even distribution of the porosity caused the flame propagated unstably and misfired in the end. Even though the given initial preheated area was even, the flame front was still somewhat unsymmetrical. The results showed that the uneven structure of the particle bed is the main reason that the flame front inclines in the filtration combustion and the initial uneven factor accelerates the instability of the flame propagation.

Key words: porous media, filtration combustion, combustion propagation, instability, experimental study

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