中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (12): 65-70.doi: 10.16265/j.cnki.issn1003-3033.2018.12.011

• 安全工程技术科学 • 上一篇    下一篇

基于HLLC算法的连通器瓦斯爆炸模拟研究

刘玉姣1,2 讲师, 高科**1,2 副教授, 贾进章1,2 教授   

  1. 1 辽宁工程技术大学 安全科学与工程学院,辽宁 葫芦岛 125105
    2 辽宁工程技术大学 矿山热动力灾害与防治教育部重点试验室,辽宁 葫芦岛 125105
  • 收稿日期:2018-09-22 修回日期:2018-11-15 发布日期:2020-11-25
  • 通讯作者: ** 高 科(1983—),男,山东莱芜人,博士,副教授,主要从事瓦斯爆炸特性研究。E-mail:gaokelntu@163.com。
  • 作者简介:刘玉姣 (1984—),女,湖南宜章人,博士,讲师,主要从事矿井瓦斯爆炸传播特性方面的研究。E-mail:lyjlntu@163.com。
  • 基金资助:
    国家自然科学基金资助(51404126);辽宁省自然科学基金资助(20170540422)。

Numerical simulation of gas explosion in enclosed interconnected vessel based on HLLC algorithm

LIU Yujiao1,2, GAO Ke1,2, JIA Jinzhang1,2   

  1. 1 College of Safety Science & Engineering, Liaoning Technical University, Huludao Liaoning 125105, China
    2 Key Laboratory of Mine Thermo-motive Disaster & Prevention, Ministry of Education, Huludao Liaoning 125105, China
  • Received:2018-09-22 Revised:2018-11-15 Published:2020-11-25

摘要: 为研究连通器瓦斯爆炸的瞬态流场并精确捕捉冲击波,采用基于详细化学反应的建表方法(TDC),在OpenFOAM平台上开发基于HLLC算法的瓦斯爆炸求解器,对1 m3密闭釜-管道系统内的瓦斯(甲烷)-空气预混气体爆炸模拟分析,通过瓦斯爆炸试验对模拟结果进行验证,在此基础上分析连通器瓦斯爆炸火焰及冲击波传播特性。结果表明:瓦斯爆炸火焰经过管道时加速,以射流形式喷入传爆釜,传爆釜冲击波的反射波与射流火焰耦合诱导二次爆炸,冲击波强度二次急剧上升;传爆釜中冲击波强度随管道长度增加而增大,管道长4 m时,火焰传播持续加速,而管道长6和 10 m时,火焰传播速度先增高后降低。

关键词: HLLC算法, 连通器, 瓦斯爆炸, 数值模拟, OpenFOAM

Abstract: HLLC algorithm based on density solver was embedded into the OpenFOAM to accurately capture shock wave induced by gas explosion. In order to overcome stiff problems in the flow field calculation, a method was developed based on tabulation methodology of detailed chemical reactions(TDC). Propagation characteristics of shock wave induced by gas explosion in ducts under different gas volume fractions were studied in an 1 m3 confined vessel connected to ducts, and the results of numerical simulation were verified through the experiments. The transient flow field in the transfer vessel was also studied by numerical simulation. Research results show that the flame is accelerated to jet into the transfer vessel after passing through the pipeline, and the shock wave arises suddenly and intensely due to the Interaction between reflection wave and flame, that the longer the pipeline is, the stronger the pressure will be in the transfer vessel, that the flame propagation speed in ducts increases initially and then decreases when the length of the pipeline is 6 m and 10 m, and that when the length is 4 m, the flame speed increases continuously.

Key words: Harten-lax-van leer contact(HLLC) algorithm, enclosed interconnected vessel, gas explosion, numerical simulation, OpenFOAM

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