LNG泄漏扩散模拟研究  

Study on LNG Leakage and Diffusion Simulation

作　　者：苑伟民[1] 袁宗明[2] 毕建伟[3] 常兴[3] 王小尚[4] 

机构地区：[1]中国石化天然气分公司工程建设管理处,山东济南250000 [2]西南石油大学,四川成都610500 [3]中国石化天然气分公司工程技术部,北京100011 [4]中国石化青岛液化天然气有限公司,山东青岛266400

出　　处：《天然气与石油》2011年第4期1-5,91,共5页Natural Gas and Oil

基　　金：中国石油化工股份有限公司LNG资助项目(702081B0712)

摘　　要：为了准确描述环境因素对液化天然气(LNG)泄漏后扩散的影响,研究和比较了各种气体扩散模型,将板模型和高斯模型相结合建立液化天然气泄漏扩散模型;重点讨论了泄漏后蒸气扩散的运动规律及重要影响因素,结合大气湍流理论和气体运动状态方程对LNG蒸汽的重气扩散和被动扩散过程进行了详细论述。运用MicrosoftVisualBasic和MATLAB语言开发了液化天然气泄漏扩散模拟软件,通过模拟不同情况下LNG泄漏的危险性区域,分析了环境因素对LNG泄漏后果的影响。将模型计算结果进行了结果分析,总结了风速和大气稳定度相互作用对液化天然气泄漏的影响规律,为该类事故的风险定量计算提供了可借鉴的方法,可为有关部门制订和完善事故的应急救援措施和风险管理提供参考。In order to accurately describe effects of environment factors on LNG diffusion after leakage,compared and studied are diffusion models of various gases,board model is combined with Gaussian Model and established is a LNG leakage and diffusion model.Analyzed are movement rule of water vapor diffusion after LNG leakage and important influence factors and discussed in detail are heavy gas diffusion process and passive diffusion process of water vapor from LNG in combination with atmospheric turbulence theory and gas movement state equation.Developed is software for simulating LNG diffusion after leakage by using Microsoft Visual Basic and MATLAB language,simulated are hazardous areas where LNG is leaked in different conditions and analyzed are effects of environment factors on LNG diffusion consequences.Obtained is information relative to the effects of interaction of wind speed and atmospheric stability on LNG diffusion after leakage through calculating simulation results,which provides a quantitative risk calculation method for reference in similar accidents,and relative departments may refer to the information in preparation and completion of emergency and rescue measures and risk management.

关 键 词：LNG 泄漏 扩散 气体扩散模型 数值模拟 安全评价 

分 类 号：TE88[石油与天然气工程—油气储运工程]