基于VOF方法的海底管道溢油扩散数值模拟研究  

Numerical simulation on the oil spill for the submarine pipeline based on VOF method

作　　者：李志刚[1,2,3] 蒋梅荣[1,2,3] 余建星[2] LI Zhigang JIANG Meirong YU Jianxing(Offshore Oil Engineering Co., Ltd., Tianjin 300451, China State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China CNOOC Research Institute, Beijing 100028, China)

机构地区：[1]海洋石油工程股份有限公司,天津300451 [2]天津大学水利工程仿真与安全国家重点实验室,天津300072 [3]中海油研究总院,北京100028

出　　处：《海洋工程》2016年第6期100-110,共11页The Ocean Engineering

基　　金：工信部海洋工程装备科研项目(E-0815C003);中国博士后科学基金(2015M580203);国家自然科学基金重点项目(51239008)

摘　　要：在海底输油管道运行过程中,管道渗漏、穿孔及破碎都会导致原油泄漏。对溢油运动的轨迹及其扩散范围作出预报可为溢油事故的处理提供及时、准确的信息,指导应急处理的正确实施。基于工程实际需求,采用有限体积法,结合k-ε紊流模型,建立了海流作用下海底输油管道溢油扩散数值模型。采用VOF方法(volume of fluid method)追踪多相流界面。首先,将数值模拟结果与Fan的实验值及Zheng和Yapa的数值结果进行了对比,验证数值模型的可靠性;其次,研究了不同原油溢出速度与环境水深对不同时刻溢油轨迹、到达海面时间、横向漂移距离与海面扩散范围的影响。研究表明:随原油溢出速度增大,溢油到达海面时间逐渐减小,溢油横向漂移距离与海面扩散范围则逐渐增大;随环境水深增大,溢油到达海面时间逐渐增大,且其变化接近线性分布。During the operation process of submarine oil pipeline,oil spill may occur due to leakage,perforation and fragmentation.The correct forecast of the spilling trajectory and the diffusion range can provide timely information for the handling of the oil spill accidents. Based on the Finite Volume Method,the k-ε turbulence model is introduced to establish an oil spill numerical model for the submarine pipeline under the action of current. The VOF method（ Volume Of Fluid method） is adopted to track the interface of multiphase flow phase. Firstly,the model simulation results are compared with the available experimental values（ Fan,1967） and the numerical results（ Zheng and Yapa,1998）,thus proving the reliability of the present model. Furthermore,the influences of the crude oil spilling velocity and the environmental water depth on the oil trajectory at different times,the arriving time at the sea surface,the lateral drifting distance and the surface diffusion range are studied. The results show that with the increase of crude oil spilling velocity,the arriving time at the sea surface decreases,but the lateral drifting distance and the surface diffusion range are increased gradually;with the increase of the water depth,the arriving time at the sea surface increases gradually and its change is close to a linear distribution.

关 键 词：海底管道 溢油 湍流 有限体积法 VOF方法 

分 类 号：P756.2[天文地球—海洋科学] X55[环境科学与工程—环境工程]