流动显示技术用于胜利埕岛油田海底管道淘空对策的研究

随着海洋石油工业的发展,海底管道的安全运行成为愈来愈受关注的问题。笔者针对胜利埕岛油田海底管道的淘空情况,采用流动显示技术研究海底管道由部分裸露到完全淘空过程中管道周围的流场特征。试验结果表明:海底管道从裸露到淘空,冲刷由缓慢变得急剧,直至淘空达一定程度后冲刷达到平衡;海流绕流管道时存在一涡脱落的相关长度,该长度约为2～3d。

Study of scouring of submarine pipelines in the Shengli oil field by flow visualizing

The safe running of submarine pipelines are paid more attention with the ocean petroleum industry development. In this paper, the flow characteristics around a submarine pipeline is studied from the pipe exposing partly to its scouring fully by flow visualization according to the scouring status of the submarine pipelines in Shengli oil field. The experiment results show that the scouring of sand around a pipeline exposing partly is much more fiercel than that of the pipeline which is fully scouring, but the scouring will reach the dynamic balance when the scouring gets to some degree. In addition we have observed that the correlation length of vortex shedding is about two to three times of the pipeline diameter.