Explosion of gasoline/air mixture ignited by pilot flame in semi-confined space
-
摘要: 为研究明火引燃油气着火爆炸特性，建立了半封闭着火爆炸实验平台。通过高速摄影仪拍摄的火焰图像，研究不同油气体积分数下的火焰传播特性。根据高频压力传感器采集的容器内压力变化情况，分析不同油气体积分数下的压力发展特性。结果表明，油气体积分数对火焰组分、火焰传播速度、压力和压力变化速率有显著影响；火焰具有明显的分区现象，可分为燃烧核和火焰阵面，并且纵向火焰阵面速度大于横向火焰阵面速度；容器内压力发展历程可分为4个阶段，而且会形成压力双峰现象；油气爆炸过程中，火焰结构与压力波形成了强烈的耦合作用。Abstract: A semi-confined vessel was built to study the explosion of the gasoline/air mixture ignited by a pilot flame. The flame propagation at different gasoline/air volume fractions were characterized through the flame images from a high-speed camera. The pressures development at different gasoline/air volume fractions were characterized according to the pressure data acquired by a high-frequency pressure sensor. The results showed that the gasoline/air volume fraction had a significant influence on the flame's species, propagation velocity, pressure and pressure rise rate. The flame exhibited an obvious zoning phenomenon, was observed to divide into a flame kernel and a flame front. The speed of the vertical flame front was faster than that of the horizontal flame front. The pressure development process went through four stages, and produced a phenomenon of two pressure peaks. A strong coupling effect was formed between the flame and the pressure wave in the process of the gasoline/air explosion
-
图 7 油气体积分数1.0%时超压及超压变化速率时程曲线
Figure 7. History of overpressure and its rate of overpressure variation at the gasoline/air volume fraction of 1.0%
图 8 油气体积分数1.7%时超压及超压变化速率时程曲线
Figure 8. History of overpressure and its rate of overpressure variation at the gasoline/air volume fraction of 1.7%
图 9 油气体积分数2.4%时超压及超压变化速率时程曲线
Figure 9. History of overpressure and its rate of overpressure variation at the gasoline/air volume fraction of 2.4%
图 10 不同油气体积分数下压力发展4个阶段的时间比例
Figure 10. Proportion of time in four stages at different gasoline/air volume fractions
表 1 不同油气体积分数下的压力参数
Table 1. Pressure parameter for different gasoline/air volume fractions
φ/% 压力峰值 (dp/dt)/(kPa·s-1) t/ms p1/kPa p2/kPa 最大值 最小值 Ⅰ Ⅱ Ⅲ Ⅳ 1.0 2.014 1.077 0.197 -0.986 25.3 27.0 15.7 72.0 1.7 2.606 1.889 0.647 -0.492 15.6 9.8 6.8 45.8 2.4 1.989 0.246 0.092 -1.026 25.5 58.9 27.6 15.8 
下载: 导出CSV
-
[1] 帅先勇, 王元刚.油库着火爆炸事故的形成原因及预防[J].石油库与加油站, 2003, 12(5):17-18. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=ykjy200305008&dbname=CJFD&dbcode=CJFQSHUAI Xianyong, WANG Yuangang. Causes and prevention of fire and explosion accident in oil depot[J]. Oil Depot and Gas Station, 2003, 12(5):17-18. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=ykjy200305008&dbname=CJFD&dbcode=CJFQ [2] 赵衡阳.气体和粉尘爆炸原理[M].北京:北京理工大学出版社, 1996. [3] KUNDU S, ZANGANEH J, MOGHTADERI B. A review on understanding explosions from methane-air mixture[J]. Journal of Loss Prevention in the Process Industries, 2016, 40:507-523.DOI: 10.1016/j.jlp.2016.02.004. [4] WERLE S, WILK R K. Ignition of methane and propane in high-temperature oxidizers with various oxygen concentrations[J]. Fuel, 2010, 89(8):1833-1839.DOI: 10.1016/j.fuel.2010.03.012. [5] RYU Jungwan, KWON Jongseo, KIM Ryanggyun, et al. Surface ignition behaviors of methane-air mixture in a gas oven burner[J]. Applied Thermal Engineering, 2014, 65(1/2):262-272. http://www.sciencedirect.com/science/article/pii/S135943111400012X [6] ELBAZ A M, ZAYED M F, SAMY M, et al. The flow field structure of highly stabilized partially premixed flames in a concentric flow conical nozzle burner with coflow[J]. Experimental Thermal and Fluid Science, 2016, 73:2-9.DOI: 10.1016/j.expthermflusci.2015.08.016. [7] 范宝春, 邢晓江, 李鸿志.可燃介质中高温火团诱导的爆炸及其抑制[J].兵工学报, 2001, 22(2):195-198. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=bigo200102013&dbname=CJFD&dbcode=CJFQFAN Baochun, XING Xiaojiang, LI Hongzhi. Explosion induced by a hot reactive gas pocket and its suppression[J]. Acta Armamentarii, 2001, 22(2):195-198. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=bigo200102013&dbname=CJFD&dbcode=CJFQ [8] 欧益宏, 杜扬, 张峥, 等.高热壁油气热爆燃实验研究[J].安全与环境学报, 2008, 8(4):115-118. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=aqhj200804029&dbname=CJFD&dbcode=CJFQOU Yihong, DU Yang, ZHANG Zheng, et al. Experiment analysis of gasoline-air mixture deflagration under the condition of hot wall[J]. Journal of Safety and Environment, 2008, 8(4):115-118. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=aqhj200804029&dbname=CJFD&dbcode=CJFQ [9] 欧益宏, 杜扬, 蒋新生, 等.地下坑道瓦斯热着火实验研究[J].煤矿安全, 2011, 42(2):4-7. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=mkaq201102003&dbname=CJFD&dbcode=CJFQOU Yihong, DU Yang, JIANG Xinsheng, et al. Experimental study on thermal ignition of gas in underground tunnel[J]. Safety in Coal Mines, 2011, 42(2):4-7. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=mkaq201102003&dbname=CJFD&dbcode=CJFQ [10] 吴松林, 杜扬, 张培理, 等.点火方式对受限空间油气爆燃规律的影响研究[J].化工学报, 2015, 66(2):1-8. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hgsz201604069&dbname=CJFD&dbcode=CJFQWU Songlin, DU Yang, ZHANG Peili, et al. Study on ignition effect for gasoline-air deflagration behavior in confined space[J]. Journal of Chemical Industry and Engineering, 2015, 66(2):1-8. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hgsz201604069&dbname=CJFD&dbcode=CJFQ [11] 程平, 张为俊, 储焰南, 等.用选择离子流动管质谱测定汽油和柴油蒸汽成分[J].分析化学, 2003, 31(5):548-551. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=fxhx200305009&dbname=CJFD&dbcode=CJFQCHENG Ping, ZHANG Weijun, CHU Yannan, et al. Analysis of petrol and diesel vapor using selective ion flow tube/mass spectrometry[J]. Chinese Journal of Analytical Chemistry, 2003, 31(5):548-551. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=fxhx200305009&dbname=CJFD&dbcode=CJFQ [12] 欧益宏, 袁广强, 周建忠, 等.半封闭空间钨丝点燃油气特性研究[J].后勤工程学院学报, 2016, 32(4):38-44. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hqgc201604009&dbname=CJFD&dbcode=CJFQOU Yihong, YUAN Guangqiang, ZHOU Jianzhong, et al. Experiment characteristics of tungsten wire ignition gasoline-air mixture in semi-confined space[J]. Journal of Logistics Engineering University, 2016, 32(4):38-44. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hqgc201604009&dbname=CJFD&dbcode=CJFQ [13] 徐进生, 刘洋, 陈先锋, 等.甲烷与空气质量浓度当量比对火焰结构及传播特性的影响[J].中国安全科学学报, 2014, 24(9):64-69. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=zaqk201409013&dbname=CJFD&dbcode=CJFQXU Jinsheng, Liu Yang, Chen Xianfeng, et al. Effect of CH4 to air mass concentration ratio on flame structure and propagation characteristic[J]. China Safety Science Journal, 2014, 24(9):64-69. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=zaqk201409013&dbname=CJFD&dbcode=CJFQ [14] MENON S K, BOETTCHER P A, VENTURA B, et al. Hot surface ignition of n-hexane in air[J]. Combustion and Flame, 2015, 163:42-53. http://www.sciencedirect.com/science/article/pii/S0010218015002722 [15] 汪泉. 有机玻璃方管内瓦斯爆燃火焰传播特性研究[D]. 合肥: 中国科学技术大学, 2013. http://cdmd.cnki.com.cn/Article/CDMD-10358-1013218147.htm [16] 牛芳, 刘庆明, 白春华, 等.甲烷/空气预混气的火焰传播过程[J].北京理工大学学报, 2012, 32(5):441-445. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=bjlg201205003&dbname=CJFD&dbcode=CJFQNIU Fang, LIU Qingming, BAI Chunhua, et al. Observation of propagating flame of methane-air mixture[J]. Transactions of Beijing Institute of Technology, 2012, 32(5):441-445. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=bjlg201205003&dbname=CJFD&dbcode=CJFQ [17] 牛芳, 刘庆明, 白春华, 等.甲烷-煤尘爆炸物火焰传播特性[J].高压物理学报, 2012, 26(4):455-461. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=gywl201204014&dbname=CJFD&dbcode=CJFQNIU Fang, LIU Qingming, BAI Chunhua, et al. Flame propagation and combustion in methane-coal-air mixture[J]. Chinese Journal of High Pressure Physics, 2012, 26(4):455-461. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=gywl201204014&dbname=CJFD&dbcode=CJFQ [18] NIE Baisheng, HE Xueqiu, ZHANG Chen, et al. Temperature measurement of gas explosion flame based on the radiation thermometry[J]. International Journal of Thermal Sciences, 2014, 78:132-144. doi: 10.1016/j.ijthermalsci.2013.12.010 [19] GUO Jin, SUN Xuxu, RUI Shengchao, et al. Effect of ignition position on vented hydrogen-air explosions[J]. International Journal of Hydrogen Energy, 2015, 40(45):15780-15788.DOI: 10.1016/j.ijhydene.2015.09.038. [20] 胡俊, 万士昕, 浦以康, 等.柱形容器开口泄爆过程中的火焰传播特性[J].爆炸与冲击, 2004, 24(4):330-336. http://www.bzycj.cn/CN/abstract/abstract9964.shtmlHU Jun, WAN Shixin, PU Yikang, et al. The characteristics of flame propagation during explosion venting from cylindrical vessel[J]. Explosion and Shock Waves, 2004, 24(4):330-336. http://www.bzycj.cn/CN/abstract/abstract9964.shtml [21] Rocourt X, Awamat S, Sochet I, et al. Vented hydrogen-air deflagration in a small enclosed volume[J]. International Journal of Hydrogen Energy, 2014, 39(35):20462-20466. doi: 10.1016/j.ijhydene.2014.03.233 [22] GUO Jin, WANG Changjian, LI Quan, et al. Effect of the vent burst pressure on explosion venting of rich methane-air mixtures in a cylindrical vessel[J]. Journal of Loss Prevention in the Process Industries, 2016, 40:82-88. doi: 10.1016/j.jlp.2015.12.006 -
图(11) / 表(1)
计量
- 文章访问数: 5341
- HTML全文浏览量: 1442
- PDF下载量: 277
- 被引次数: 0