火灾条件下液化气体罐车的热响应研究*

doi:10.16265/j.cnki.issn1003-3033.2018.S2.010

中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (S2): 54-59.doi: 10.16265/j.cnki.issn1003-3033.2018.S2.010

火灾条件下液化气体罐车的热响应研究^*

王明¹, 石剑云¹, 尹盼盼², 唐波¹, 梁羽威¹

1 大连交通大学安全工程系,辽宁大连 116028;
2 国家铁路局市场监测评价中心,北京 100036

收稿日期:2018-09-10 修回日期:2018-11-08 出版日期:2018-12-30 发布日期:2020-11-11
作者简介:石剑云 (1979—),男,河北石家庄人,博士,讲师,主要从事风险评估、液化气储运安全方面的研究。E-mail: sjy_487@163.com。
基金资助:
辽宁省自然科学基金指导计划资助(201601249); 辽宁省大学生创新创业训练计划项目(201810150050)。

Research on thermal response of liquefied gas tank car under fire condition

WANG Ming¹, SHI Jianyun¹, YIN Panpan², TANG Bo¹, LIANG Yuwei¹

1 School of Traffic and Transportation Engineering, Dalian Jiaotong University, Dalian Liaoning 116028, China;
2 Center of Market Monitoring and Evaluation, National Railway Administration, Beijing 100036, China

Received:2018-09-10 Revised:2018-11-08 Online:2018-12-30 Published:2020-11-11

摘要/Abstract

摘要： 为研究液化气体罐车在火灾条件下的热响应机制,采用试验和数值模拟相结合的方法,建立卧式储罐热响应试验台,并运用Ansys软件构建数值计算模型,对比分析不同加热条件下储罐外壁温度及内部介质温度随时间的变化。试验与数值模拟结果趋势一致,均显示储罐在全加热条件下内部介质会形成明显的温度分层,而储罐在底部加热条件下内部介质温度基本均匀。由分析计算得到的温度场与流场发现,2种加热条件下不同的壁面温度分布导致壁面“爬升流”的差异及温度分层的差异。根据试验及计算结果,可推出:当液化气体罐车只受到底部火焰加热时,内部介质不易形成热分层,爆炸前的总能量更高。

关键词: 液化气体, 罐车, 热响应, 热分层, 数值模拟

Abstract: In order to explore the response mechanism of tank car under fire condition, a horizontal tank thermal response test-bed was built, where experiments were adopted along with numerical simulation, and a numerical model was built with the help of Ansys software so that a comparative analysis was conducted into temperature variation of outer walls and interior medium with time under various heating conditions. The results of experiment and numerical simulation were basically consistent; suggesting that clear thermal stratification would be generated within interior medium in condition of all heating, while temperature uniformity would be generated in condition of bottom heating. Through analysis of the temperature field and flow field under the two heating conditions, it was showed that different wall surface temperatures leaded to different rising flows along the wall surface and different temperature stratification under two heating conditions. Based on the results of experiments and computations, it can be concluded that the bottom fire heating will lead to isotheraml fluid in the tank car, which implies higher energy before explosion.

Key words: liquefied gas, tank car, thermal response, thermal stratification, numerical simulation

中图分类号:

X932

王明, 石剑云, 尹盼盼, 唐波, 梁羽威. 火灾条件下液化气体罐车的热响应研究^*[J]. 中国安全科学学报, 2018, 28(S2): 54-59.

WANG Ming, SHI Jianyun, YIN Panpan, TANG Bo, LIANG Yuwei. Research on thermal response of liquefied gas tank car under fire condition[J]. China Safety Science Journal, 2018, 28(S2): 54-59.

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火灾条件下液化气体罐车的热响应研究^*

Research on thermal response of liquefied gas tank car under fire condition

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