Characteristics of flame propagation velocity of gas explosion in duct based on image processing

被引：0
|
作者：
Nie B.-S. [1 ,2 ]
Yang L.-L. [1 ,2 ]
Meng J.-Q. [1 ,2 ]
He X.-Q. [1 ,2 ]
机构：
[1] State Key Lab of Coal Resources and Safe Mining, China University of Mining and Technology(Beijing), Beijing
[2] School of Resource & Safety Engineering, China University of Mining and Technology(Beijing), Beijing
来源：
Meitan Xuebao | / 4卷 / 884-891期
关键词：
Correlation coefficient; Flame velocity; Gas explosion; Image processing;
D O I：
10.13225/j.cnki.jccs.2015.1106
中图分类号：
学科分类号：
摘要：
A gas explosion at 9.5% concentration was performed in an experimental system and the images of propagating flame were shot by a high-speed photography system in order to investigate the flame velocity of premixed gas/air mixture explosion. A new computational method of methane explosion flame propagation velocity was proposed based on the correlation coefficient between two adjacent flame images. Variation of gas explosion flame velocity of the whole process was obtained and the characteristics of dynamic changes were analyzed. The results indicate that the explosion flame undergoes a process of acceleration, deceleration, reverse acceleration, and reverse deceleration until it is quenched. Further research was performed by analyzing the details of explosion flame images and the flame propagation velocity of different regions in observation window. Comparison of two kinds of results proves that this method is accurate and reliable. The process of calculating the propagation velocity of gas explosion can be applied to the condition that flame is full of pipe. © 2016, China Coal Society. All right reserved.
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页码：884 / 891
页数：7
相关论文
共 22 条
  • [1] Lin B., Jian C., Zhou S., Inducement of turbulence and its effect on fire transmission in gas explosion, Journal of China University of Mining & Technology, 3, 2, pp. 107-108, (2003)
  • [2] Yu M., Zheng K., Zheng L., Et al., Effect of pipe opening blockage ratio on flame propagation characteristics of gas explosions, Journal of China University of Mining & Technology, 43, 2, pp. 183-188, (2014)
  • [3] Liu B., Li C., Sun T., Et al., Measurement for flame speed of CH<sub>4</sub>/H<sub>2</sub> blends with ionic current method, Journal of Xi'an Jiaotong University, 49, 1, pp. 40-45, (2015)
  • [4] Chen X., Chen M., Zhang Q., Et al., Experimental investigation of gas explosion microstructure and dynamic characteristics in a semi-vented pipe, Journal of China Coal Society, 35, 2, pp. 246-249, (2010)
  • [5] Bi M., Li J., Flame propagation of methane-coal dust explosion in closed vessel, Journal of China Coal Society, 35, 8, pp. 1298-1302, (2010)
  • [6] Qiu R., Ignition energy influenced to travel speed of gas explosion flame, Coal Science and Technology, 39, 3, pp. 52-55, (2011)
  • [7] Li Y., Tan Y., Ding X., Et al., Parameters of diameter varied pipe affected to flame propagation velocity of gas explosion, Coal Science and Technology, 41, 10, pp. 67-69, (2013)
  • [8] Zhai C., Lin B., Jian C., Et al., Influence of wall roughness on flame transmission of gas explosion, Journal of China University of Mining & Technology, 35, 1, pp. 39-43, (2006)
  • [9] Lin B., Hong Y., Zhu C., Et al., Quantitative relationship between flow speed and overpressure of gas explosion in the open-end square tube, Explosion and Shock Waves, 35, 1, pp. 108-115, (2015)
  • [10] He X., Yang Y., Wang E., Et al., Effects of obstacle on premixed flame microstructure and flame propagation in methane/air explosion, Journal of China Coal Society, 29, 2, pp. 186-189, (2004)
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