中文摘要：

为了预测海底管道泄漏油品的扩散规律,解决油品泄漏后的回收处理问题,文中基于计算流体力学CFD的基础,选取k-ε模型和VOF模型建立数值模拟仿真模型,根据不同泄漏速度,模拟了原油泄漏后的扩散情况。通过不同的泄漏速度的分析可以得出：泄漏速度低时,射流持续时间短,发生在海底且横向扩散位移呈线性变化,泄漏速度高时射流时间长,发生位置较高,横向扩散位移分成三个阶段：扩散-短暂停止-扩散。且随着泄漏速度的增加,其对横向位移的影响越来越小。该研究可为海底管道漏油应急预报系统提供理论参考。

英文摘要：

In order to predict the diffusion law of submarine oil pipeline leakage,it is needed to solve the recycling problem after oil pipeline leakage. Based on CFD,the k-epsilon model and the VOF model are selected to set up the numerical simulation model. According to different leaking speeds,this paper simulates the diffusion situation after oil spill. The results of different leakage speeds show that,when the leaking velocity is slow,the time of jet flow is short and it spreads at the bottom of the sea,with lateral displacement occurring in a linear change. When the leak velocity is fast,in contrast,the time of jet flow is long,the position is higher,and lateral diffusion displacement is divided into three stages： diffusion,a brief stop,and diffusion. With the increase of leakage velocity,its influence on lateral displacement is becoming weaker. The results of this research can provide a theoretical reference for the establishment of an emergency prediction system for leakage accidents of submarine oil pipelines.