不同泄压条件对方管内爆炸压力特性的影响
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摘要
为研究泄压膜约束条件对甲烷/空气预混气体爆炸压力特性的影响,在方形火焰燃烧传播测试管道中布置压力传感器,开展不同泄压膜材料、泄压膜层数及泄压口位置实验。结果表明:牛皮纸和聚丙烯薄膜约束泄爆过程中,每增加一层泄压膜,管道内最大泄爆压力平均上升11.2%和12.3%。各强度泄压膜约束条件下,管道内最大泄爆压力随着泄压口位置接近点火端,均呈现Z形规律,当泄压口设置在距尾部端面0.25 m时,各曲线达到最小值,当泄压口设置在距尾部端面0.50 m时,各曲线出现最大值。
In this work we carried out vented explosion experiments with different pressure relief membrane material and layers and different venting locations in the square flame propagation test pipeline and investigated the influence of pressure relief membrane constraints on explosion pressure's characteristics of premixed methane/air gas using the pressure sensor to measure the peak overpressure under various experimental conditions in the pipeline and comparing their venting effects. The results showed that there is a linear relationship between the maximum explosion pressure and the number of relief membrane layers made of the same material. The maximum explosion pressure in the pipeline increased by 11.2% and 12.3% respectively for each additional pressure relief membrane layer of kraft paper and polypropylene film. As the venting location approached the ignition end, the maximum explosion pressure in the pipeline showed a "Z"pattern with different pressure relief membrane strengths. When the venting location was set at 0.25 m from the trailing end, the minimum value was observed for each curve. When the venting location was set at 0.50 m from the trailing end, each curve reached its maximum value.
In this work we carried out vented explosion experiments with different pressure relief membrane material and layers and different venting locations in the square flame propagation test pipeline and investigated the influence of pressure relief membrane constraints on explosion pressure's characteristics of premixed methane/air gas using the pressure sensor to measure the peak overpressure under various experimental conditions in the pipeline and comparing their venting effects. The results showed that there is a linear relationship between the maximum explosion pressure and the number of relief membrane layers made of the same material. The maximum explosion pressure in the pipeline increased by 11.2% and 12.3% respectively for each additional pressure relief membrane layer of kraft paper and polypropylene film. As the venting location approached the ignition end, the maximum explosion pressure in the pipeline showed a "Z"pattern with different pressure relief membrane strengths. When the venting location was set at 0.25 m from the trailing end, the minimum value was observed for each curve. When the venting location was set at 0.50 m from the trailing end, each curve reached its maximum value.
引文
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[19]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.HU 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.
[20]高东志,卫海桥,周磊,等.封闭空间中火焰-冲击波相互作用及缸内压力波动现象分析[J].红外与激光工程,2017,46(2):31-36.DOI:10.3788/IRLA201746.0239004.GAO Dongzhi,WEI Haiqiao,ZHOU Lei,et al.Experimental study of flame-shock wave interaction and cylinder pressure oscillation in confined space[J].Infrared and Laser Engineering,2017,46(2):31-36.DOI:10.3788/IRLA201746.0239004.
[21]赵衡阳.气体和粉尘爆炸原理[M].北京:北京理工大学出版社,1996:230.
[22]闫兴清.高静态动作压力下粉尘爆炸泄放特性研究[D].大连:大连理工大学,2014:39-40.
[23]卢捷,宁建国,王成,等.煤气火焰传播规律及其加速机理研究[J].爆炸与冲击,2004,24(4):305-311.LU Jie,NING Jianguo,WANG Cheng,et al.Study on flame propagation and acceleration mechanism of city coal gas[J].Explosion and Shock Waves,2004,24(4):305-311.
[2]周立江,范进,丁建国.气云爆炸下钢筋混凝土板毁伤的数值分析[J].爆破,2017,34(4):143-148.DOI:10.3963/j.issn.1001-487X.2017.04.026.ZHOU Lijiang,FAN Jin,DING Jianguo.Numerical simulation on damage assessment of RC slabs under vapour cloud explosion[J].Blasting,2017,34(4):143-148.DOI:10.3963/j.issn.1001-487X.2017.04.026.
[3]杜扬,王世茂,齐圣,等.油气在顶部含弱约束结构受限空间内的爆炸特性[J].爆炸与冲击,2017,37(1):53-60.DOI:10.11883/1001-1455(2017)01-0053-08.DU Yang,WANG Shimao,QI Sheng,et al.Explosion of gasoline/air mixture in confined space with weakly constrained structure at the top[J].Explosion and Shock Waves,2017,37(1):53-60.DOI:10.11883/1001-1455(2017)01-0053-08.
[4]王世茂,杜扬,李国庆,等.开口率和点火源类型对汽油蒸气泄压爆炸内场超压荷载的影响[J].化工进展,2018,37(1):23-31.DOI:10.16085/j.issn.1000-6613.2017-0809.WANG Shimao,DU Yang,LI Guoqing,et al.Effect of vent size and the ignition source type on the internal overpressure loading of vented gasoline-air mixture explosion[J].Chemical Industry and Engineering Progress,2018,37(1):23-31.DOI:10.16085/j.issn.1000-6613.2017-0809.
[5]任少峰,陈先锋,王玉杰,等.泄压口比率对气体泄爆过程中的动力学行为的影响[J].煤炭学报,2011,36(5):830-833.DOI:10.13225/j.cnki.jccs.2011.05.033.REN Shaofeng,CHEN Xianfeng,WANG Yujie,et al.Effect of pressure-orifice ratio on dynamic behavior during gas venting[J].Journal of China Coal Society,2011,36(5):830-833.DOI:10.13225/j.cnki.jccs.2011.05.033.
[6]葛俊峰.不同管道开口率下丙烷-空气预混火焰传播规律的研究[J].内蒙古师范大学学报(自然科学汉文版),2015,44(6):785-787.DOI:10.3969/j.issn.1001-8735.2015.06.016.GE Junfeng.Investigation of the propagation law of premixed propane-air flame in the duct with different opening ratios[J].Journal of Inner Mongolia Normal University(Natura Science Edition),2015,44(6):785-787.DOI:10.3969/j.issn.1001-8735.2015.06.016.
[7]BAO Q,FANG Q,ZHANG Y,et al.Effects of gas concentration and venting pressure on overpressure transients during vented explosion of methane-air mixtures[J].Fuel,2016,175:40-48.DOI:10.1016/j.fuel.2016.01.084.
[8]赵天辉,高康华,王明洋,等.方形容器爆燃泄放过程中的压力特性实验研究[J].兵工学报,2017,38(4):722-727.DOI:10.3969/j.issn.1000-1093.2017.04.013.ZHAO Tianhui,GAO Kanghua,WANG Mingyang,et al.Experimental study of pressure characteristics during deflagration venting in a square vessel[J].Acta Armamentarii,2017,38(4):722-727.DOI:10.3969/j.issn.1000-1093.2017.04.013.
[9]欧益宏,李润,袁广强,等.半封闭空间明火引燃油气特性实验[J].爆炸与冲击,2018,38(2):455-464.DOI:10.11883/bzycj-2017-0117.OU Yihong,LI Run,YUAN Guangqiang,et al.Explosion of gasoline/air mixture ignited by pilot flame in semi-confined space[J].Explosion and Shock Waves,2018,38(2):455-464.DOI:10.11883/bzycj-2017-0117.
[10]孙松,王明洋,高康华,等.大尺度泄爆构件对室内爆燃压力影响的实验研究[J].爆炸与冲击,2018,38(2):359-366.DOI:10.11883/bzycj-2016-0211.SUN Song,WANG Mingyang,GAO Kanghua,et al.Experimental study on effect of large-scale explosion venting component on interior deglagration pressure[J].Explosion and Shock Waves,2018,38(2):359-366.DOI:10.11883/bzycj-2016-0211.
[11]ZHANG Q,JIANG J,YOU M,et al.Experimental study on gas explosion and venting process in interconnected vessels[J].Journal of Loss Prevention in the Process Industries,2013,26(6):1230-1237.DOI:10.1016/j.jlp.2013.05.007.
[12]ZHANG K,WANG Z,JIANG J,et al.Effect of pipe length on methane explosion in interconnected vessels[J].Process Safety Progress,2016,35(3):241-247.DOI:10.1002/prs.11819.
[13]曹勇,郭进,胡坤伦,等.点火位置对氢气-空气预混气体泄爆过程的影响[J].爆炸与冲击,2016,36(6):847-852.DOI:10.11883/1001-1455(2016)06-0847-06.CAO Yong,GUO Jin,HU Kunlun,et al.Effect of ignition locations on vented explosion of premixed hydrogen-air mixtures[J].Explosion and Shock Waves,2016,36(6):847-852.DOI:10.11883/1001-1455(2016)06-0847-06.
[14]师峥.管道内预混可燃气体爆炸及其泄爆的数值模拟[D].太原:中北大学,2017:47-49.
[15]陈鹏,黄福军,纪婧,等.管道由封闭向开口转化过程中预混火焰传播特性[J].辽宁工程技术大学学报,2015,34(12):1335-1339.DOI:10.11956/j.issn.1008-0562.2015.12.002.CHEN Peng,HUANG Fujun,JI Jing,et al.Characteristics of gas premixed flame propagation in pipeline from sealing to opening[J].Journal of Liaoning Technical University,2015,34(12):1335-1339.DOI:10.11956/j.issn.1008-0562.2015.12.002.
[16]ALEXIOU A,ANDREWS G E,PHYLAKTOU H.A Comparison between end-vented and side-vented gas explosions in large L/D vessels[J].Process Safety and Environmental Protection,1997,75(1):9-13.DOI:10.1205/095758297528715.
[17]YU M,WAN S,ZHENG K,et al.Effect of side venting areas on the methane/air explosion characteristics in a pipeline[J].Journal of Loss Prevention in the Process Industries,2018,54:123-130.DOI:10.1016/j.jlp.2018.03.010.
[18]胡俊,浦以康,万士昕,等.柱形容器开口泄爆过程中压力发展特性的实验研究[J].爆炸与冲击,2001,21(1):47-52.HU Jun,PU Yikang,WAN Shixin,et al.Experimental investigations of pressure development during explosion vent from cylindrical vessels[J].Explosion and Shock Waves,2001,21(1):47-52.
[19]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.HU 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.
[20]高东志,卫海桥,周磊,等.封闭空间中火焰-冲击波相互作用及缸内压力波动现象分析[J].红外与激光工程,2017,46(2):31-36.DOI:10.3788/IRLA201746.0239004.GAO Dongzhi,WEI Haiqiao,ZHOU Lei,et al.Experimental study of flame-shock wave interaction and cylinder pressure oscillation in confined space[J].Infrared and Laser Engineering,2017,46(2):31-36.DOI:10.3788/IRLA201746.0239004.
[21]赵衡阳.气体和粉尘爆炸原理[M].北京:北京理工大学出版社,1996:230.
[22]闫兴清.高静态动作压力下粉尘爆炸泄放特性研究[D].大连:大连理工大学,2014:39-40.
[23]卢捷,宁建国,王成,等.煤气火焰传播规律及其加速机理研究[J].爆炸与冲击,2004,24(4):305-311.LU Jie,NING Jianguo,WANG Cheng,et al.Study on flame propagation and acceleration mechanism of city coal gas[J].Explosion and Shock Waves,2004,24(4):305-311.