井喷失控气云爆炸的3维数值模拟  

Three-dimensional numerical simulation of gas cloud explosion induced by well blowout

作　　者：艾志久[1] 吴光武 王其华 雷文章[1,3] 陈高松 

机构地区：[1]西南石油大学,四川成都610500 [2]中海油研究总院,北京100027 [3]中国石油集团公司安全环保技术研究院,北京100083

出　　处：《爆炸与冲击》2010年第1期96-100,共5页Explosion and Shock Waves

基　　金：中国石油集团公司2006年重点项目(06B7101)~~

摘　　要：基于K-ε模型和改进的EBU模型,考虑甲烷-空气混合气云形成过程,建立了井喷失控甲烷喷射流扩散及混合气云爆炸的理论模型,选用SIMPLE方法求解差分方程,模拟甲烷-空气混合气云形成过程,分析了不同点火点对混合气云爆炸影响程度。结果表明,点火点方位及点火点所在气体体积分数对气云爆炸都有明显的影响,点火点越靠近气云中心和所在甲烷体积分数越高爆炸效果越强,最后为井喷失控人工点火提出了合适的点火方位。Based on the K-ε model and the improved eddy break-up （EBU） model, a new theoretical model was established to describe the methane jet diffusion induced by well blowout and the methaneair cloud explosion. And the methane-air cloud diffusion was considered in the new model. By using the new model, the SIMPLE algorithm was adopted to solve differential equations. The formation process of the methane-air cloud was numerically simulated to investigate the effects of different ignitions on the mixture cloud explosion. The results show that the ignition locations and the gas cloud concentrations at the ignition points can affect markedly the gas cloud explosion. The nearer the ignition point away from the gas cloud center and the higher the gas concentration at the ignition point, the more intensely the gas cloud explodes.

关 键 词：流体力学 爆炸效果 EBU模型 井喷失控 气云 点火 

分 类 号：O351.2[理学—流体力学] X932[理学—力学]