| 5种结构障碍物对火焰传播影响的试验研究 |
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| 引用本文： | 丁以斌,肖福全,宣晓燕,党宏斌,崔鑫. 5种结构障碍物对火焰传播影响的试验研究[J]. 中国安全科学学报, 2011, 21(2) |
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| 作者姓名： | 丁以斌 肖福全 宣晓燕 党宏斌 崔鑫 |
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| 作者单位： | 安徽省安全生产科学研究院,安全工程技术研究所,安徽,合肥,230061 |
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| 摘 要： | 为了研究障碍物结构对预混甲烷管道内火焰传播速度和峰值超压的影响,自行设计一套火焰加速系统。在火焰加速管道上安装光电传感器和压力传感器分别测定火焰传播速度和超压,试验中选取5种结构障碍物,即平板、长方体、三棱柱、四棱柱和圆柱,其阻塞比分别为20%,40%和60%3种。研究结果表明:初始阶段障碍物阻碍火焰传播,当火焰越过障碍物后,障碍物能显著加速火焰传播。随着阻塞比增加,相同结构障碍物的火焰传播速度总体上不断增加,而峰值超压先变大后减小。相同阻塞比下,平板、三棱柱对火焰传播速度和超压影响相对较大;长方体居中;圆柱、四棱柱对增加火焰传播速度和超压作用相对较小。较小阻塞比障碍物管道内超压与无障碍物管道中的超压相比显著增加,但此后,管道中超压随阻塞比变化不明显。
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| 关 键 词： | 障碍物结构 火焰传播速度 峰值超压 火焰加速 阻塞比 |
Experimental Study on the Effects of Five Different Shaped Obstacles on Flame Propagation |
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| DING Yi-bin,XIAO Fu-quan,XUAN Xiao-yan,DANG Hong-bin,CUI Xin. Experimental Study on the Effects of Five Different Shaped Obstacles on Flame Propagation[J]. China Safety Science Journal, 2011, 21(2) |
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| Authors: | DING Yi-bin XIAO Fu-quan XUAN Xiao-yan DANG Hong-bin CUI Xin |
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| Affiliation: | DING Yi-bin XIAO Fu-quan XUAN Xiao-yan DANG Hong-bin CUI Xin(Safety Engineering Technology Institute,Anhui Province Academy of Safety Science and Technology,Hefei Anhui 230061,China) |
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| Abstract: | By applying self-designed experimental system for flame acceleration and choosing five different structure obstacles,the effect of obstacle structure on flame propagation speed and peak overpressure for premixed methane flame propagation was investigated.Plates,cuboids,triple prisms,quadruple prisms,cylinders were adopted with a blockage ratios of 20%,40% and 60%,respectively.Pressure transducers and photoelectric diodes were mounted at different positions of top acceleration tube for measuring flame speed ... |
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| Keywords: | obstacle structure flame propagation speed peak overpressure flame acceleration blockage ratios |
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