Experimental study on a comparison of typical premixed combustible gas-air flame propagation in a horizontal rectangular closed duct

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• 作者：Kaiqiang Jin^a ; ^b ; Qiangling Duan^a ; K.M. Liew^b ; Zhongjing Peng^a ; Liang Gong^a ; Jinhua Sun^a ; ^{sunjh@ustc.edu.cn}
• 关键词：Premixed flame ; Flame tip speed ; Pressure dynamics ; Comparison ; Flame skirt motion
• 刊名：Journal of Hazardous Materials
• 出版年：2017
• 出版时间：5 April 2017
• 年：2017
• 卷：327
• 期：Complete
• 页码：116-126
• 全文大小：2313 K
• 卷排序：327

文摘

Natural gas, methane, and acetylene present quite different flame dynamics due to their different compositions. Tulip flame forms with equivalence ratio 0.72 ≤ Φ ≤ 1.44 for natural gas, 0.79 ≤ Φ ≤ 1.30 for methane, 0.40 ≤ Φ ≤ 1.70 for acetylene. Small amount of ethane etc. existing in natural gas provide it a wider equivalence ratio range in tulip flame formation. Acetylene has the fastest flame tip speed and the maximal pressure, while methane shows the slowest and minimal one. The Bychkov theory coincides well with the experimental data in the case of equivalence ratios close to 1.00.