开敞空间蒸气云爆炸超压场数值模拟  

Numerical Simulation for the Overpressure Field from Unconfined Vapor Cloud Explosions

作　　者：何东海[1] 杜扬[1] 欧益宏[1] 梁建军[1] 

机构地区：[1]后勤工程学院军事供油工程系,重庆401311

出　　处：《后勤工程学院学报》2012年第5期26-30,共5页Journal of Logistical Engineering University

基　　金：重庆市自然科学基金资助项目(CSTC;2009BA6019);火灾与爆炸安全防护重庆市重点实验室建设资助项目(CSTC;2010CA0005)

摘　　要：根据开敞空间蒸气云爆炸的特点和发展规律,基于RNGk-ε湍流模型、Eddy-dissipation湍流化学反应模型和相应的控制方程,构建描述半球形蒸气云爆炸的二维理论模型。采用SIMPLEC算法,利用计算流体动力学技术对蒸气云爆炸场进行数值模拟,得到爆炸超压场沿时间与空间的分布,与实验值进行比较,吻合良好。该模型可以用来预测开敞空间蒸气云爆炸强度,对蒸气云爆炸事故分析具有一定的指导意义。According to the characteristics and regularity of unconfined vapor cloud explosions （UVCE）, the two-dimensional- ly theoretical model of hemispherical vapor cloud explosion is established, which is based on the RNG k -ε model, Eddy-dissipation turbulence-chemistry reaction model and relevant governing equations. The computational fluid dynamics （CFD） technology is used to simulate the explosion field from vapor cloud by adopting the SIMPLEC algorithm, and the overpressure distributions of va- por cloud with time and space are obtained respectively. The results show that numerical calculation coincides with real experiment, and the model can be used to forecast the explosion intensity of unconfined vapor cloud. The research is of some significance to ana- lyze the vapor cloud explosion.

关 键 词：开敞空间蒸气云爆炸 超压 数值模拟 计算流体动力学 

分 类 号：TE687[石油与天然气工程—油气加工工程]