爆炸与冲击2018，Vol.38Issue(4)：891-897,7.DOI:10.11883/bzycj-2016-0323
开敞空间液化天然气泄漏低温扩散及爆炸传播规律
The leakage,low temperature diffusion and explosion of liquefied natural gas in open space
摘要
Abstract
It is known that low-temperature is apt to cause skin frost bite and material embrittlement, and that the propagation law of gas explosion is the foundation of explosion evolution and accident analysis. In this paper, we investigated the process of extensive gas leakage, gas mixing with air and explosion of the liquefied natural gas (LNG) in open space using numerical simulation. The results show that, as the diffusion distance increases, the lowest possible fluctuating temperature (i. e. temperature valley) of LNG increases, and this tendency gradually slows down; that the temperature is below 273 K in the area within 110 m away from the leakage center; that the temperature valley decreases almost linearly as the wind velocity increases. As the leakage time gets longer, the temperature valley decreases, and so does its decreasing tendency. With the distance from the leakage center getting longer, the peak overpressure increases at first and then decreases. In the area within 200 m away from the leakage center, the high temperature produced by the explosion may pose a hazard to human casualties.关键词
液化天然气/泄漏/低温/浓度分布/爆炸Key words
liquefied natural gas/leaking/low temperature/concentration distribution/explosion分类
数理科学引用本文复制引用
任少云..开敞空间液化天然气泄漏低温扩散及爆炸传播规律[J].爆炸与冲击,2018,38(4):891-897,7.基金项目
武警学院国家自然科学基金培育项目(ZKJJPY201621) （ZKJJPY201621）
国家重点研发计划项目(2016YFC0800609) （2016YFC0800609）
