水下油气溢漏事故污染物输移预测模型  

A model for simulating the transport and diffusion of oil and gas released in underwater spill accidents

作　　者：廖国祥[1] 高振会 熊德琪[3] 

机构地区：[1]武汉理工大学航运学院,武汉430063 [2]国家深海基地,山东青岛266061 [3]大连海事大学环境科学与工程学院,辽宁大连116026

出　　处：《大连海事大学学报》2010年第4期115-120,共6页Journal of Dalian Maritime University

基　　金：国家海洋局海洋溢油鉴别与损害评估技术重点实验室开放基金项目(201022);中央高校基本科研业务费专项资金资助

摘　　要：为评估海底油气管道泄漏、油气井井喷等水下事故的污染风险及其损害影响,及时制定科学应急反应决策,本文基于拉格朗日积分方法建立水下油气溢漏事故污染物输移预测模型.该模型能够模拟污染物在密度和流速分层的真实水下环境中的水流卷吸、湍流分散、溢油溶解、油气共同输移与分离输移等动态行为.进行了水下环境的浮力射流、气泡羽流以及油气分离输移等实验的数值模拟验证,计算结果与实验数据基本吻合.实际水下溢油试验结果表明,溢油在水下环境中的输移扩散过程的模拟结果与现场监测数据基本符合.To evaluate the pollution risks and environment impacts resulting from underwater oil and gas spill accidents,and thereby work out corresponding countermeasures,a three-dimensional numerical model for simulating the behavior of oil and gas released from underwater spill accidents is developed.The model is based on the Lagrangian integral method.The model can simulate the transport of oil in ocean environment with stratified density and following ambient.The model considers the entrainment,turbulent diffusion and dissolution of spilled oil.The behaviors of oil/gas mixture co-transport and gas separation from a bent plume in underwater can also be simulated.A series of buoyant jet,bubble plume and oil/gas mixture plume tests are numerical simulated.The model results are in good agreements with the experimental data.Then,the model is used to simulate a field underwater oil spill experiment in the North Sea.Results show that the simulated trajectory of spilled oil matches well with the field observed data.

关 键 词：水下溢漏事故 油气混合物 输移扩散 气体分离 数值模拟 

分 类 号：X55[环境科学与工程—环境工程]