LPG泄漏扩散数值模拟与安全范围分析

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英文篇名：Numerical simulation and security range analysis of LPG leakage diffusion 作者：郝建超 ; 董华 ; 牟永强 ; 张敬奎 ; 林欢 英文作者：HAO Jian-chao;DONG Hua;MU Yong-qiang;ZHANG Jing-kui;LIN Huan;School of Environmental and Municipal Engineering,Qingdao University of Technology; 关键词：LPG ; 数值模拟 ; 泄漏扩散 ; 安全分析 英文关键词：LPG;;numerical simulation;;leakage diffusion;;safety analysis 中文刊名：QDJG 英文刊名：Journal of Qingdao University of Technology 机构：青岛理工大学环境与市政工程学院; 出版日期：2019-01-10 20:40 出版单位：青岛理工大学学报 年：2019 期：v.40;No.166 基金：国家自然科学基金资助项目(11402180) 语种：中文; 页：QDJG201901010 页数：6 CN：01 ISSN：37-1440/N 分类号：60-64+133

摘要

液化石油气(LPG)在空气中泄漏后会迅速发生扩散.泄漏扩散主要影响因素有LPG的泄漏量、外界风速等.选取泄漏量为2、4kg/s,风速为2、5m/s的泄漏条件下,运用计算流体力学软件进行数值模拟计算,模拟计算了LPG泄漏扩散的体积分数随时间的变化,根据其爆炸火灾极限浓度,分析了区域中燃烧爆炸范围,得到重气云团的扩散规律.结果表明,LPG泄漏初始阶段,被空气稀释程度较小,云团浓度较大,表现出明显的重气效应.泄漏时间越长,燃烧爆炸的范围越大;泄漏量越大,泄漏扩散速率和爆炸火灾的范围越大;环境风速越大,燃烧爆炸的距离越大,但LPG被空气稀释,质量浓度变小,减小了爆炸火灾危险性.
        Liquefied petroleum gas(LPG)leaks and diffuses rapidly in the air.The main influencing factors are LPG leakage rate,wind speed and so on.This paper selects the leakage amount of 2 and 4 kg/s,the wind in the leakage conditions of 2 and 5 m/s,numerical simulation using CFD software,simulates the changing of volume fraction of LPG leakage diffusion with time.It gets the diffusion of heavy gas clouds according to the explosion limit concentration,analysis of regional fuel burning and explosion.The results show that the leakage of LPG initial stage,less diluted by air,clouds of higher concentration show obvious effect of heavy gas.The longer the leakage time goes,the higher the range of the explosion combustion;the greater the amount of leakage,leakage and diffusion rate and fire explosion more environment;the greater the wind speed,the greater the distance of the explosion,but LPG is air dilution then decreases the concentration and reduces the danger of fire explosion.

引文

[1]淮秀兰,俞昌铭.高温环境下容器内液化气的热响应分析[J].河北联合大学学报(自然科学版),1996(1):24-29.
    [2] PIETERSEN C M.Analysis of the LPG-disaster in mexico city[J].Journal of Hazardous Materials,1988,20(1):85-107.
    [3]陆朝荣,张永国.西安市液化气爆炸事故的过程及分析[J].油气储运,1999,18(10):47-49.
    [4]方亭.新媒体时代突发事件的网络传播分析:以“西安11·14餐饮店铺爆炸事件”为例[J].新闻爱好者,2012(6):13-14.
    [5] ALP E,MATTHIAS C S,COBR A.A heavy gas/liquid spill and dispersion modelling system[J].Journal of Loss Prevention in the Process Industries,1991,4(3):139-150.
    [6]王文和,孙宝江,补艳,等.液氯储罐瞬时泄漏扩散质量浓度分布规律与中毒后果评价[J].安全与环境学报,2017,17(1):6-11.
    [7] WHEATLEY C J,WEBBER D M.Aspects of the dispersion of denser-than-air vapours relevant to gas cloud-explosions[J].Safety of Thermal Water Reactors,1984:191-200.
    [8] PONTIGGIA M,LANDUCCI G,BUSINI V,et al.CFD model simulation of LPG dispersion in urban areas[J].Atmospheric Environment,2011,45(24):3913-3923.
    [9]金鑫.LPG储罐泄漏扩散及火灾模拟研究[D].大连:大连交通大学,2013.
    [10]翟美玉,马贵阳,王梓丞,等.室内LPG泄漏扩散数值模拟[J].辽宁石油化工大学学报,2016,36(4):18-23.
    [11]刘玉金,谭蔚,刘丽艳,等.风场条件下LPG瞬时泄漏扩散的数值模拟[J].化学工业与工程,2012,29(6):36-41.
    [12]周轶,陆忠义,唐士军,等.重气扩散研究现状与进展[J].安全与环境学报,2012(3):242-247.
    [13]黄琴,蒋军成.重气扩散研究综述[J].安全与环境工程,2007,14(4):36-39.
    [14] HANNA S R,ICHARD H M,STRIMAITIS D.CFD model simulation of dispersion from chlorine railcar releases in industrial and urban areas[J].Atmospheric Environment,2009,43(2):262-270.
    [15]刘昕亮,谢飞,董影超,等.LPG站储罐区火灾爆炸危险性分析与安全措施[J].中国安全生产科学技术,2011,7(9):178-182.