上海交通大学学报

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (03): 458-462.

• 天文学、地球科学 • 上一篇    下一篇

基于Fluent的海底管线附近流场分析

 陈薛浩, 朱志夏   

  1. （上海交通大学 船舶海洋与建筑工程学院， 上海 200240）
  • 收稿日期:2010-05-17 出版日期:2012-03-30 发布日期:2012-03-30
  • 基金资助:

    国家高技术研究发展计划（863）项目（2007AA09Z312）

Analysis of Flow around Submarine Pipeline Based on Fluent

 CHEN  Xue-Hao, ZHU  Zhi-Xia   

  1. (School of Naval Architecture, Ocean and Civil Engingeering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2010-05-17 Online:2012-03-30 Published:2012-03-30

摘要： 针对单向海流作用下海底管道附近的流场问题，通过一定的假设，将问题简化为定床条件下的二维圆柱绕流问题. 采用不可压缩的NS方程和标准kε湍流模型，模拟了置于床面的管道附近流场，结果与实验一致；同时，很好地模拟了悬空管道后方涡旋的生成、发展和脱落过程. 在此基础上，计算了不同流速和间隙比等条件下的多种工况，指出了管道附近的易冲刷区域，并进一步分析了绕流流态变化、床面切应力和管道上下游床面压差的分布特点，为防止管道附近床面的冲刷提供科学依据.    

关键词: 海底管线, 流场分析, 圆柱绕流, 间隙比, 床面切应力

Abstract: In certain assumptions, the analysis of flow around submarine pipeline in uniflow was simplified to twodimensional flow around cylinder on fixed bed. Incompressible N  S formula and standard k  ε turbulence model were applied to simulate the flow around the pipe on seabed, and the results were consistent with the experimental results. The development (i.e. formation, expansion and shedding) of vortex on the leeside of pipe was simulated for suspended pipe; furthermore, pipes on different conditions (i.e. different elevation and income flow velocities) were calculated, and the most possible scour area was found; flow development, bed shear stress, and pressure distribution characteristics on bed were calculated in order to provide scientific basis of preventing the local scour around subsea pipelines.

Key words: submarine pipeline, flow field analysis, flow around cylinder, gap ratio, bed shear stress

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