改进的蒸气云爆炸模型在LNG储罐爆炸模拟中的应用  

Application of Improved Vapor Cloud Explosion Model in Explosion Simulation of LNG Storage Tank

作　　者：伍蒙 许渊 李左 陈慧芳 李博 WU Meng;XU Yuan;LI Zuo;CHEN Huifang;LI Bo(Xingfa Mining Institute,Wuhan Institute of Technology,Wuhan 430074)

机构地区：[1]武汉工程大学兴发矿业学院

出　　处：《工业安全与环保》2019年第10期44-47,共4页Industrial Safety and Environmental Protection

基　　金：武汉工程大学研究生教育创新基金项目(CX2018082)

摘　　要：针对TNT当量法在LNG储罐蒸气云爆炸模拟中的应用进行了改进,考虑并分析了使用传统TNT模型时所忽略的LNG液池蒸发过程,通过建立LNG与地面的传热模型得出了LNG液池蒸发速率随时间变化的关系,液池的蒸发速率在最初随时间的增长较快,在增至最大值后与时间的平方根成反比逐渐减小。以3万m 3 LNG储罐连续泄漏20 min为例,根据蒸发速率与时间的关系算出了蒸气云团中的燃料量,再结合蒸气云爆炸模型利用Matlab软件进行了事故后果模拟计算,得出发生蒸气云爆炸时的死亡半径为36.629 5 m,重伤半径为83.557 6 m,轻伤半径124.725 m,财产损失半径为109.017 9 m。相较于无蒸发过程的传统模型,此计算结果更加具有参考意义。This paper improves the application of TNT equivalent method in the simulation of LNG storage tank vapor cloud explosion,considers and analyzes the evaporation process of LNG liquid pool neglected when using traditional TNT model,and obtains the relationship between the evaporation rate of LNG liquid pool and time by establishing the heat transfer model of LNG and ground,finding that the evaporation rate of liquid pool increases rapidly with time at the beginning and decreases inversely with the square root of time after increasing to the maximum value.In 30 000 m 3LNG tank continuous leakage 20 min,for example,according to the relationship between evaporation rate and time,the amount of fuel in the vapor cloud is calculated,coupled with vapor cloud explosion model,the consequences of the accident is simulated by using Matlab software and it is concluded that the radius of death when a vapor cloud explodes is 36.629 5 m,the serious injury radius is 83.557 6 m,minor radius of 124.725 m and property damage radius of 109.017 9 m.Compared with the traditional model without evaporation process,this calculation result has more reference significance.

关 键 词：LNG 储罐 MATLAB 蒸气云 爆炸 

分 类 号：TE9[石油与天然气工程—石油机械设备]