压力容器2025，Vol.42Issue(4)：41-47,7.DOI:10.3969/j.issn.1001-4837.2025.04.006
火烧环境无隔热气瓶超压工程预测模型构建
Construction of engineering prediction model on overpressure of uninsulated gas cylinder under fire environment
摘要
Abstract
Aiming at the problem of reduced pressure bearing capacity caused by rapid temperature rise of gas cylinders due to heat in fire burning environment,taking uninsulated gas cylinders as research object,an engineering prediction model for internal overpressure and rupture was constructed,by using theories of thermodynamics,heat transfer,and material mechanics and making some simplification and assumptions.A calculation program for model was developed based on Matlab software.Three natural gas cylinder experiments under external fire were selected as the calculation case.The physical property parameters of methane at different temperatures and pressures were determined by calling REFPROP software.The calculation results of the model were compared with experimental values.The results indicate that the key to reliability of the model calculation results lies in the setting of flame temperature and convective heat transfer coefficient towards the wall.The flame temperature and convective heat transfer coefficient recommended in existing literature result in significantly higher predicted values than experimental values.When the flame temperature is set to 1 000 K and the convective heat transfer coefficient is set to 15 W/(m2·K),the calculated gas pressure of the three sets of calculation cases is in good agreement with the experimental values.The research results can provide a reference for quantifying the heat transfer and material strength failure mechanism of uninsulated gas cylinders in fire environments.关键词
气瓶/无隔热/超压/火烧环境/工程模型Key words
gas cylinder/uninsulated/overpressure/fire environment/engineering model分类
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韩冰,戴行涛,刘岩,闫兴清,李岳,喻健良..火烧环境无隔热气瓶超压工程预测模型构建[J].压力容器,2025,42(4):41-47,7.基金项目
国家市场监管重点实验室(气瓶安全技术)开放课题项目(2023K02) （气瓶安全技术）
