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。
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.
作者
刘玉姣
高科
贾进章
LIU Yujiao;GAO Ke;JIA Jinzhang(College of Safety Science&Engineering,Liaoning Technical University,Huludao Liaoning 125105,China;Key Laboratory of Mine Thermo-motive Disaster&Prevention,Ministry of Education,Huludao Liaoning 125105,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2018年第12期65-70,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51404126)
辽宁省自然科学基金资助(20170540422)
关键词
HLLC算法
连通器
瓦斯爆炸
数值模拟
OPENFOAM
Harten-lax-van leer contact(HLLC)algorithm
enclosed interconnected vessel
gas explosion
numerical simulation
OpenFOAM
