东北大学学报（自然科学版）

东北大学学报（自然科学版） ›› 2013, Vol. 34 ›› Issue (11): 1593-1596.DOI: 10.12068/j.issn.1005-3026.2013.11.018

• 材料与冶金 • 上一篇    下一篇

CH4/O2/CO2层流预混火焰传播速度实验研究

胡贤忠，于庆波，秦勤，王泽鑫   

  1. (东北大学材料与冶金学院，辽宁沈阳110819)
  • 发布日期:2013-07-09
  • 通讯作者: 胡贤忠
  • 作者简介:胡贤忠(1984-)，男，山东枣庄人，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:
    国家科技支撑计划项目(2013BAA03B03)；国家自然科学基金资助项目(51274066).

Experimental Investigation on Laminar Flame Speeds of Premixed CH4/O2/CO2 Mixture〓

HU Xianzhong， YU Qingbo， QIN Qin， WANG Zexin   

  1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China.
  • Published:2013-07-09
  • Contact: YU Qingbo
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摘要： 采用本生灯法，测量了CH4/O2/CO2混合气在不同工况下的层流预混火焰传播速度.采用基于火焰图像的全面积法计算本生灯火焰的传播速度.主要研究了化学当量比(08~12)、氧气体积分数(25%~35%)和稀释剂种类(N2，CO2)对火焰传播速度的影响规律.结果表明:当化学当量比为1时火焰传播的速度达到最大值，在其两侧火焰传播速度逐渐下降；火焰传播速度随着氧气体积分数的增加而增加，且火焰传播速度与氧气体积分数呈二次函数关系；与N2相比，高浓度CO2降低了火焰传播速度，CH4在O2/CO2气氛下的火焰传播速度约为O2/N2气氛下的五分之一.

关键词: 富氧燃烧, O2/CO2, 层流火焰传播速度, 本生灯, 全面积法

Abstract: The laminar flame speeds of CH4/O2/CO2 mixtures in atmospheric conditions were measured using Bunsen method. The whole surface area methodology based on the images of flame was performed to obtain the laminar flame speeds of the Bunsen burner. The effect factors on laminar flame velocities of CH4/O2/CO2 mixtures were discussed， including equivalence ratios (08~12)， oxygen concentrations (25%~35%) and dilutions (N2， CO2). Results showed that the laminar flame speeds of the premixed oxymethane mixture reached a maximum at the stoichiometric ratio of 1 while gradually lowered on either side. The laminar flame speeds increased with the increase of the O2 concentration and there was a quadratic function relationship between the flame velocities and the concentration of the O2. Compared with N2， the high concentration of CO2 decreased the flame speeds and the measured flame speeds using CO2 as the oxidizer was about onefifth of that using N2 as the oxidizer.

Key words: oxycombustion, O2/CO2, laminar flame speed, Bensun burner, surface area methodology

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