井喷失控气云爆炸的3维数值模拟

基金项目:

中国石油集团公司2006年重点项目(06B7101)

Three-dimensionalnumericalsimulationofgascloudexplosion inducedbywellblowout

Funds:

ChinaNationalPetroleumCorporation(06B7101)

摘要: 基于K- 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。
- 流体力学 /
- 爆炸效果 /
- EBU 模型 /
- 井喷失控 /
- 气云 /
- 点火
Abstract: BasedontheK- modelandtheimprovededdybreak-up(EBU)model,anewtheoretical modelwasestablishedtodescribethemethanejetdiffusioninducedbywellblowoutandthemethaneaircloudexplosion. Andthemethane-airclouddiffusionwasconsideredinthenew model.Byusing thenew model,theSIMPLEalgorithm wasadoptedtosolvedifferentialequations.Theformation processofthemethane-aircloudwasnumericallysimulatedtoinvestigatetheeffectsofdifferentignitionsonthemixturecloudexplosion. Theresultsshowthattheignitionlocationsandthegascloud concentrationsattheignitionpointscanaffectmarkedlythegascloudexplosion.Thenearertheignitionpointawayfromthegascloudcenterandthehigherthegasconcentrationattheignitionpoint, themoreintenselythegascloudexplodes.
- fluidmechanics|explosioneffect|eddybreak-up(EBU)model|wellblowout /
- gascloud| ignition /