分岔管道内瓦斯爆炸火焰传播规律实验及数值模拟
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摘要
为了研究煤矿井下瓦斯爆炸火焰在分岔巷道内的传播规律,自制45°分岔管道实验装置开展甲烷体积分数为9.5%的瓦斯爆炸火焰传播实验,用Fluent 16.0软件模拟分岔管道内瓦斯爆炸火焰传播过程。对比分析实验数据与模拟结果,得到分岔管道瓦斯爆炸火焰传播的变化规律。研究结果表明:1)分岔管道内瓦斯爆炸火焰在分岔处产生漩涡,加速管道内爆炸火焰湍流化,火焰冲击反射现象明显;2)分岔支管截面处爆炸火焰温度、传播速度、冲击波超压与离子电流峰值最大;3)瓦斯爆炸火焰传播的模拟结果与实验数据在数值上存在一定差异,但各参量总体变化趋势相同。研究结果为深入认识井下瓦斯爆炸传播机制和在巷道分岔处采取瓦斯爆炸火焰传播抑制措施提供一定参考。
In order to study the propagation law of gas explosion flame in underground bifurcation tunnel of coal mine,a bifurcation pipeline experiment device with bifurcation angle of 45° was made,the gas explosion experiment with methane concentration of 9.5% was carried out and Fluent 16.0 software was used to simulate the propagation process of gas explosion flame in the bifurcated pipeline.Experimental data were compared with the simulation results to analyze the variation law of the gas explosion flame propagation.The results show that:1)The gas explosion flame in the bifurcated pipeline generates vortex at the bifurcation,accelerating the turbulence of the explosion flame in the pipeline,and the shock reflection of the flame is obvious.2)Explosion flame temperature,propagation speed,shock wave overpressure and ionic current at the section of bifurcated branch pipe reach their peaks.3)There are some value differences between the simulation and the experiment results,but the overall change law of gas explosion flame propagation is the same.The research results provide certain references for understanding the mechanism of underground gas explosion propagation and formulating measures to suppress it at the bifurcation of roadway in the coal mine.
In order to study the propagation law of gas explosion flame in underground bifurcation tunnel of coal mine,a bifurcation pipeline experiment device with bifurcation angle of 45° was made,the gas explosion experiment with methane concentration of 9.5% was carried out and Fluent 16.0 software was used to simulate the propagation process of gas explosion flame in the bifurcated pipeline.Experimental data were compared with the simulation results to analyze the variation law of the gas explosion flame propagation.The results show that:1)The gas explosion flame in the bifurcated pipeline generates vortex at the bifurcation,accelerating the turbulence of the explosion flame in the pipeline,and the shock reflection of the flame is obvious.2)Explosion flame temperature,propagation speed,shock wave overpressure and ionic current at the section of bifurcated branch pipe reach their peaks.3)There are some value differences between the simulation and the experiment results,but the overall change law of gas explosion flame propagation is the same.The research results provide certain references for understanding the mechanism of underground gas explosion propagation and formulating measures to suppress it at the bifurcation of roadway in the coal mine.
引文
[1]Nie B S,Yang L L,Wang J W.Experiments and mechanisms of gas explosion suppression with foam ceramics[J].Combustion Science and Technology,2016,188(11/12):2117-2127.
[2]Ye Q,Wang G G X,Jia Z Z,et al.Experimental study on the influence of wall heat effect on gas explosion and its propagation[J].Applied Thermal Engineering,2017,118:392-397.
[3]贾智伟,许胜铭,景国勋,等.瓦斯爆炸冲击波在单向分叉管道内的传播规律试验研究[J].中国安全科学学报,2015,25(12):51-55.JIA Zhiwei,XU Shengming,JING Guoxun,et al.Experimental study on propagation law of gas explosion shock wave in one-way bifurcatedpipeline[J].China Safety Science Journal,2015,25(12):51-55.(in Chinese)
[4]贾智伟,刘彦伟,景国勋.瓦斯爆炸冲击波在管道拐弯情况下的传播特性[J].煤炭学报,2011,36(1):97-100.JIA Zhiwei,LIU Yanwei,JING Guoxun.Propagation characteristic about shock wave of gas explosion at laneway corner[J].Journal of China Coal Society,2011,36(1):97-100.(in Chinese)
[5]赵丹,齐昊,潘竞涛,等.不同类型管道内瓦斯爆炸冲击波传播试验研究[J].中国安全科学学报,2018,28(3):79-83.ZHAO Dan,QI Hao,PAN Jingtao,et al.Experimental study on gas explosion shock wave propagation in different types of pipelines[J].China Safety Science Journal,2018,28(3):79-83.(in Chinese)
[6]翟成,林柏泉,菅从光.瓦斯爆炸火焰波在分叉管路中的传播规律[J].中国安全科学学报,2005,15(6):69-72.ZHAI Cheng,LIN Baiquan,JIAN Congguang.Transmission rules of gas explosion flame in divaricated tube[J].China Safety Science Journal,2005,15(6):69-72.(in Chinese)
[7]Imran M,Liew M S,Nasif M S.Experimental sudies on fire for offshore structures and its limitations:A review[J].Chemical Engineering Transactions,2015,45:1951-1956.
[8]张巨峰,武元,杨运尧,等.管道内多层金属丝网对预混可燃气体爆炸火焰传播的影响[J].山西大同大学学报(自然科学版),2012,28(1):66-70.ZHANG Jufeng,WU Yuan,YANG Yunyao,et al.Effect of multi-layer wire mesh upon pre-mixed combustible gas explosion in the tube[J].Journal of Shanxi Datong University(Natural Science Edition),2012,28(1):66-70.(in Chinese)
[9]Xiao H H,He X C,Duan Q L,et al.An investigation of premixed flame propagation in a closed combustion duct with a90°bend[J].Applied Energy,2014,134:248-256.
[10]Xiao H H,He X C,Wang Q S,et al.Experimental and numerical study of premixed flame propagation in a closed duct with a 90°curved section[J].International Journal of Heat and Mass Transfer,2013,66:818-822.
[11]Jia Z Z,Ye Q,Liu W,et al.Numerical simulation on shock failure characteristics of pipe surface with different radii under gas explosion[J].Procedia Engineering,2018,211:288-296.
[12]王文才,杨正齐,张垒,等.瓦斯爆炸冲击波在直管道中传播的衰减研究[J].内蒙古煤炭经济,2016(12):144-146.WANG Wencai,YANG Zhengqi,ZHANG Lei,et al.Study on attenuation of gas explosion shock wave propagation in straight pipeline[J].Inner Mongolia Coal Economy,2016(12):144-146.(in Chinese)
[13]江丙友,林柏泉,朱传杰,等.瓦斯爆炸冲击波在并联巷道中传播特性的数值模拟[J].燃烧科学与技术,2011,17(3):250-254.JIANG Bingyou,LIN Baiquan,ZHU Chuanjie,et al.Numerical simulation on shock wave propagation characteristics of gas explosion in parallel roadway[J].Journal of Combustion Science and Technology,2011,17(3):250-254.(in Chinese)
[14]李鹏,刘剑,高科,等.管道内瓦斯爆炸温度与压力峰值试验研究[J].安全与环境学报,2015,15(2):59-63.LI Peng,LIU Jian,GAO Ke,et al.Experimental research on the temperature and pressure peak value of the gas explosion in the pipeline[J].Journal of Safety and Environment,2015,15(2):59-63.(in Chinese)
[15]Zhu Z,Jia Z Y,Luo H Z.Characteristics of gas explosion flow fields in complex pipelines[J].International Journal of Mining Science and Technology,2015,25(1):157-164.
[16]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.WANG Quan.Study on the methane-air deflagration flames propagation characteristcs in a square plexi glasstube[D].Hefei:University of Science and Technology of China,2013.(in Chinese)
[2]Ye Q,Wang G G X,Jia Z Z,et al.Experimental study on the influence of wall heat effect on gas explosion and its propagation[J].Applied Thermal Engineering,2017,118:392-397.
[3]贾智伟,许胜铭,景国勋,等.瓦斯爆炸冲击波在单向分叉管道内的传播规律试验研究[J].中国安全科学学报,2015,25(12):51-55.JIA Zhiwei,XU Shengming,JING Guoxun,et al.Experimental study on propagation law of gas explosion shock wave in one-way bifurcatedpipeline[J].China Safety Science Journal,2015,25(12):51-55.(in Chinese)
[4]贾智伟,刘彦伟,景国勋.瓦斯爆炸冲击波在管道拐弯情况下的传播特性[J].煤炭学报,2011,36(1):97-100.JIA Zhiwei,LIU Yanwei,JING Guoxun.Propagation characteristic about shock wave of gas explosion at laneway corner[J].Journal of China Coal Society,2011,36(1):97-100.(in Chinese)
[5]赵丹,齐昊,潘竞涛,等.不同类型管道内瓦斯爆炸冲击波传播试验研究[J].中国安全科学学报,2018,28(3):79-83.ZHAO Dan,QI Hao,PAN Jingtao,et al.Experimental study on gas explosion shock wave propagation in different types of pipelines[J].China Safety Science Journal,2018,28(3):79-83.(in Chinese)
[6]翟成,林柏泉,菅从光.瓦斯爆炸火焰波在分叉管路中的传播规律[J].中国安全科学学报,2005,15(6):69-72.ZHAI Cheng,LIN Baiquan,JIAN Congguang.Transmission rules of gas explosion flame in divaricated tube[J].China Safety Science Journal,2005,15(6):69-72.(in Chinese)
[7]Imran M,Liew M S,Nasif M S.Experimental sudies on fire for offshore structures and its limitations:A review[J].Chemical Engineering Transactions,2015,45:1951-1956.
[8]张巨峰,武元,杨运尧,等.管道内多层金属丝网对预混可燃气体爆炸火焰传播的影响[J].山西大同大学学报(自然科学版),2012,28(1):66-70.ZHANG Jufeng,WU Yuan,YANG Yunyao,et al.Effect of multi-layer wire mesh upon pre-mixed combustible gas explosion in the tube[J].Journal of Shanxi Datong University(Natural Science Edition),2012,28(1):66-70.(in Chinese)
[9]Xiao H H,He X C,Duan Q L,et al.An investigation of premixed flame propagation in a closed combustion duct with a90°bend[J].Applied Energy,2014,134:248-256.
[10]Xiao H H,He X C,Wang Q S,et al.Experimental and numerical study of premixed flame propagation in a closed duct with a 90°curved section[J].International Journal of Heat and Mass Transfer,2013,66:818-822.
[11]Jia Z Z,Ye Q,Liu W,et al.Numerical simulation on shock failure characteristics of pipe surface with different radii under gas explosion[J].Procedia Engineering,2018,211:288-296.
[12]王文才,杨正齐,张垒,等.瓦斯爆炸冲击波在直管道中传播的衰减研究[J].内蒙古煤炭经济,2016(12):144-146.WANG Wencai,YANG Zhengqi,ZHANG Lei,et al.Study on attenuation of gas explosion shock wave propagation in straight pipeline[J].Inner Mongolia Coal Economy,2016(12):144-146.(in Chinese)
[13]江丙友,林柏泉,朱传杰,等.瓦斯爆炸冲击波在并联巷道中传播特性的数值模拟[J].燃烧科学与技术,2011,17(3):250-254.JIANG Bingyou,LIN Baiquan,ZHU Chuanjie,et al.Numerical simulation on shock wave propagation characteristics of gas explosion in parallel roadway[J].Journal of Combustion Science and Technology,2011,17(3):250-254.(in Chinese)
[14]李鹏,刘剑,高科,等.管道内瓦斯爆炸温度与压力峰值试验研究[J].安全与环境学报,2015,15(2):59-63.LI Peng,LIU Jian,GAO Ke,et al.Experimental research on the temperature and pressure peak value of the gas explosion in the pipeline[J].Journal of Safety and Environment,2015,15(2):59-63.(in Chinese)
[15]Zhu Z,Jia Z Y,Luo H Z.Characteristics of gas explosion flow fields in complex pipelines[J].International Journal of Mining Science and Technology,2015,25(1):157-164.
[16]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.WANG Quan.Study on the methane-air deflagration flames propagation characteristcs in a square plexi glasstube[D].Hefei:University of Science and Technology of China,2013.(in Chinese)