海底水平管线回流区水流特性研究

Study on Flow Performances of the Back-Flow Region Around the Submarine Pipelines

针对管线绕流剪切层区的水流特征,利用射流分析的类似方法,通过简化控制方程,从理论上探讨了剪切层区的时均速度分布规律。物理试验中采用ADV测速仪对回流区流场进行了测量,对各流区流速和紊动强度变化趋势进行了讨论,并将试验结果与理论推导进行对比,二者基本吻合,为进一步研究海底管线防护措施提供了理论依据。

According to the characteristics of flow around the submarine pipeline, using the method which is used to analyze jets, the velocity profiles in the free shear region are obtained through properly simplifying the governing equations. A systematic experimental research on the characteristics of the flow velocity field around the submarine pipelines is conducted by ADV and the rules of velocity and turbulent intensity changes in different flow areas are also investigated. The measure results agree well with the theoretical analysis. These results make a theoretic foundation for the further research on protection tech- nique of submarine pipelines.