【作者】 闫会宾； 薛鸿祥； 唐文勇；

【Author】 Huibin Yan;Wenyong Tang;Hongxiang Xue;State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration;

【机构】 上海交通大学海洋工程国家重点实验室； 高新船舶与深海开发装备协同创新中心；

【摘要】 海上油气装置发生气体泄漏并经过一定程度扩散后极易被点燃而发生爆炸事故。该文针对一个海上油气处理模块选取多组不同泄漏速率与风速组合下的泄漏扩散场景建立CFD模型进行分析,深入讨论了气体浓度的分布与形成规律,并选取可用于爆炸分析的重要指标"等效化学计量气体云体积"作为分析对象,深入分析其随时间的变化规律,发现气体扩散后的浓度分布均可以在一定时间后达到稳定状态,等效化学计量气体云体积不再变化;另外还探讨了泄漏速率以及风速等关键参数对特征气体云体积的大小以及形成时间的影响规律,获得的相关规律可用于类似场景的参考;最后对爆炸分析时泄漏扩散场景的选择提出了相关建议。更多还原

【Abstract】 if a hydrocarbon leak happened in an offshore oil & gas installation and dispersed with a certain time,it would be of high possibility to be ignited and lead to an explosion accident,which needs to be studied thoroughly.In this paper,CFD theory based FLACS code was chosen to do dispersion analysis for multi-group of leak scenarios in an example offshore oil & gas installationwith different leak rates and wind speeds.The distribution and evolution laws of the gas concentration in the considered zone were studied;the "equivalent stoichiometric gas volume" of each scenario,which is a key parameter to explosion analysis,was chosen to study its evolution law with time;the effect of leak rate and wind speed on the key characteristics of "equivalent stoichiometric gas volume" was discussed in detail;at last,some valuable suggestions about defining leak and dispersion scenarios for explosion accidents were given.更多还原