风速条件下掺氢天然气站场泄漏爆炸后果  

Explosion Consequence of Hydrogen Natural Gas Station under Wind Speed Condition

作　　者：宋玉彩 滕卫明 陈强峰 帅健[3] 李云涛 王西明 张小斌[4] 梅苑 SONG Yucai;TENG Weiming;CHEN Qiangfeng;SHUAI Jian;LI Yuntao;WANG Ximing;ZHANG Xiaobin;MEI Yuan(Zhejiang Energy Fuxing Fuel Co.,Ltd.;Zhejiang Baima Lake Laboratory Co.,Ltd.;College of Safety and Ocean Engineering,China University of Petroleum(Beijing);College of Energy Engineering,Zhejiang University)

机构地区：[1]浙江浙能富兴燃料有限公司 [2]浙江省白马湖实验室有限公司 [3]中国石油大学(北京)安全与海洋工程学院 [4]浙江大学能源工程学院

出　　处：《油气与新能源》2023年第5期66-73,共8页Petroleum and new energy

基　　金：浙江省白马湖实验室有限公司-中国石油大学(北京)战略合作科技专项项目《城市燃气管道掺氢对站场设备影响的关键技术研究》(JSYJY-KJFW-2021-022)。

摘　　要：预测掺氢天然气站场的事故后果对应急救援具有重要意义。在开放型空间中,风是影响掺氢天然气站场事故后果的重要因素。通过计算流体力学(CFD)模型研究了掺氢天然气站场事故场景的演化规律,重点考虑了风速对事故后果的影响。结果表明:风速条件加快空间内物质传输速度,影响气体泄漏的整个过程。在泄漏初期,泄漏气体保持在较高浓度水平,风的存在有利于促进泄漏气体与空气混合形成可燃气云;风速越大,可燃气云形成越快。在泄漏中后期,泄漏气体主要以可燃气云的形式扩散,边界浓度较低,风的存在会促进可燃气云发生弥散;风速越大,可燃气云将越难积聚,事故影响的范围也相对减小。当可燃气云达到爆炸条件时,小风速场景中会产生更大的爆炸压力值,事故影响范围也更广。It is of great significance to predict the accident consequence of hydrogen-doped natural gas station for emergency rescue.In open space,wind is a key factor influencing hydrogen natural gas station.The evolution law of accident scene of hydrogen-doped natural gas station is studied by computational fluid dynamics(CFD)model,and the influence of wind speed on accident result is taken into account.The result has it that the wind speed conditions accelerate the material transfer speed in space and affect the whole process of gas leakage.At the start of leakage,the leaking gas was maintained at a high concentration while wind is conducive to the combination of leaking gas and air which forms the flammable vapor cloud;the higher the wind speed,the faster the combustible gas cloud forms.At the medium and late period,the leaking gas is mainly diffused in the form of combustible gas clouds.As the boundary concentration is low,the presence of wind will promote the dispersion of combustible gas clouds;the greater the wind speed,the more difficult it is for the combustible gas cloud to accumulate,and the scope of the accident is relatively decreased.When the combustible gas cloud reaches the explosion condition,a larger explosion pressure value will be generated in the scenario of low wind speed,and the impact range of the accident will be wider.

关 键 词：风速 天然气掺氢 天然气站场 计算流体力学(CFD) 爆炸后果 

分 类 号：TE687[石油与天然气工程—油气加工工程]