阻火器壳体结构与爆轰火焰状态关系研究
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摘要
针对大型煤矿瓦斯运输管道甲烷爆轰过程中火焰压力波和速度与阻火器结构的匹配问题,对阻火器壳体结构变化与管道内火焰压力和速度的关系进行了仿真研究,仿真中对不同尺寸的阻火器壳体结构建立了二维几何模型和网格模型,采用RNC k-e湍流模型和通用有限速率燃烧模型,运用FLUENT软件对煤管内可燃气体爆轰过程进行了模拟.得到了阻火器壳体内径尺寸、阻火器内有无障碍物与爆轰火焰压力和速度的变化规律,通过分析阻火器内火焰速度和压力的规律,为管道爆轰阻火器的设计和选型提供更为准确的参考依据.
In view of the matching problem of flame pressure wave and velocity with the structure of fire arrester in the process of methane detonation,the authors conducted simulation study to analyses the relationship between the structural change of flame arrester housing and the pressure and speed of flame in the pipeline.During the simulation progress,two-dimensional geometric models and mesh models were built for different sizes of fire arrester shell structure.The RNC k-e turbulence model and the general finite rate combustion model were applied to simulate the detonation process of combustible gas in the coal tube by FLUENT software.We tried to understand the change law of the inner diameter of the flame arrester shell,the porosity of the flame arrester and the pressure and velocity of the detonation flame by analyzing the law of flame velocity and pressure in the flame arrester.The results provide us with an accurate reference for the design and selection of the pipe detonation arrester.
In view of the matching problem of flame pressure wave and velocity with the structure of fire arrester in the process of methane detonation,the authors conducted simulation study to analyses the relationship between the structural change of flame arrester housing and the pressure and speed of flame in the pipeline.During the simulation progress,two-dimensional geometric models and mesh models were built for different sizes of fire arrester shell structure.The RNC k-e turbulence model and the general finite rate combustion model were applied to simulate the detonation process of combustible gas in the coal tube by FLUENT software.We tried to understand the change law of the inner diameter of the flame arrester shell,the porosity of the flame arrester and the pressure and velocity of the detonation flame by analyzing the law of flame velocity and pressure in the flame arrester.The results provide us with an accurate reference for the design and selection of the pipe detonation arrester.
引文
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[15]王博,陈思维.密闭受限空间可燃气体爆炸特性数值模拟研究[J].工业安全与环保,2008,34:28.
[16]仇锐来,张延松,张兰.点火能量对瓦斯爆炸传播压力的影响实验研究[J].煤矿安全,2011,42:5.
[17]骆艳,陈豫眉,冯民富.可压缩Navier-Stokes方程的稳定化有限元方法[J].四川大学学报:自然科学版,2007,44:949.
[18]樊新玉,李辉,冯民富.非定常Navier-Stokes方程基于H(div)型有限元的涡旋黏性法[J].四川大学学报:自然科学版,2017,54:1159.
[19]周均,胡兵.燃烧方程非均匀网格有限差分方法研究[J].四川大学学报:自然科学版,2009,46:1605.
[20]陈冬林,吴雪晴,王安.典型非圆形入口自激抖动射流燃烧器的研究[J].四川大学学报:自然科学版,2015,52:631.
[2]Kakutkina N A,Korzhavin A A,Namyatov I G,et al.Flame propagation through the header of an inline flame arrester[J].Combust Explo Shock+,2007,43:391.
[3]Asano S,Ikeda S,Youn Y,et al.Visualization of behaviors of a propagating flame quenching for hydrogen-air gas mixture[J].J Visual,2010,13:107.
[4]Britton L G.Using maximum experimental safe gap to select flame arresters[J].Process Saf Prog,2000,19:140.
[5]Kakutkina N A,Korzhavin A A,Rychkov A D.Burning-through of porous flame arresters with a channel flame-arrester element[J].Combust Explo Shock+,2009,45:266.
[6]曲忠伟.甲烷预混气体爆炸极限及火焰淬熄机理研究[D].淮南:安徽理工大学,2016.
[7]孙少辰,毕明树,刘刚,等.阻火器性能测试方法实验性研究[J].化工学报,2014,65:441.
[8]Cubbage P A.Flame traps for use with town gas/air mixtures[M].British:Gas Gouncil,1959.
[9]Wilson R P,Flessner M F.Design criteria for flame arresters[C]//American Institute of Chemical Engineers 84th National Meeting.Altlanta:Georgia,1978.
[10]周凯元,李宗芬,周自金,等.阻爆器扩张腔中心缓冲隔离板对气相爆轰波的衰减作用[J].爆炸与冲击,2001,21:179.
[11]孙少辰,毕明树,丁春辉,等.波纹管道阻火器内火焰传播的实验与数值模拟研究[J].爆炸与冲击,2017,37:353.
[12]肖希,唐敬友,孟川民.冲击波诱导甲烷热分解的化学与热力学非平衡流计算[J].四川大学学报:自然科学版,2003,40:891.
[13]谢溢月.湍流对可燃气体(蒸气)爆炸极限及火焰传播过程的影响[D].太原:中北大学,2017.
[14]王海燕,周心权,曲志明.瓦斯爆炸燃烧波与冲击波相互关系及影响研究[J].煤矿安全,2008,4:1.
[15]王博,陈思维.密闭受限空间可燃气体爆炸特性数值模拟研究[J].工业安全与环保,2008,34:28.
[16]仇锐来,张延松,张兰.点火能量对瓦斯爆炸传播压力的影响实验研究[J].煤矿安全,2011,42:5.
[17]骆艳,陈豫眉,冯民富.可压缩Navier-Stokes方程的稳定化有限元方法[J].四川大学学报:自然科学版,2007,44:949.
[18]樊新玉,李辉,冯民富.非定常Navier-Stokes方程基于H(div)型有限元的涡旋黏性法[J].四川大学学报:自然科学版,2017,54:1159.
[19]周均,胡兵.燃烧方程非均匀网格有限差分方法研究[J].四川大学学报:自然科学版,2009,46:1605.
[20]陈冬林,吴雪晴,王安.典型非圆形入口自激抖动射流燃烧器的研究[J].四川大学学报:自然科学版,2015,52:631.