海洋平台圆柱桩脚周围的局部流场模拟研究(朱红钧; 陈小榆; 王怡)

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F5Ind"]4j'G7Y n0海洋平台圆柱桩脚周围的局部流场模拟研究

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【作者】朱红钧; 陈小榆; 王怡 【作者单位】西南石油大学石油工程学院水利论文 Mkn$g3GA(fP0U

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JJQ1d9Ti` ^0【论文摘要】 在复杂海洋环境进行石油勘探、开采常需搭建工作平台,当平台桩柱置于流场时, 将改变其周围的流动情况,发生绕流,产生柱前马蹄涡和柱后尾涡等流动现象.这些改变将影响平台的稳定性,极大地威胁了平台的安全工作.本研究采用有限体积法和 SIMPLE 算法, 运用 FLUENT 软件对高流速下平台圆柱桩脚周围的局部流场进行了模拟研究,得到圆柱桩脚周围的速度和压力分布,通过速度和压力的变化比较,分析海水绕过桩柱所产生的绕流阻力; 另外,从分布图中还可以清晰地看到桩柱壁四周漩涡的出现,在桩脚附近的漩涡使得周围泥沙打破原来的平衡状态,随流翻滚湍动,导致床底的局部冲刷,根据旋涡的形成和运动状态, 帮助我们分析桩柱的稳定性,为其设计提供参考依据。水利论文8bXKD@t-Uy,|,g

F%t*o:mc0【英文论文摘要】 Deepwater platform is needed in prospecting for and exploitting the petroleum.When the column of platform stands in the flow field,the presence of it will change the state of flow in its neighborhood.Circumcolumnar path,the formation of a horseshoe vortex in front of the pile and lee-wake vortices behind the pole can be found.These changes influence the steady of the offshore platform,threatening the safety of the platform.The text made numerical simulation of the flow field near the column in high velocity of flow,both the finite volume method and the SIMPLE algorithm circumcolumnar flow was analyzed by compaing the changes of velocity anf pressure.Then,swirls' fashion can be picked up clearly,which break the original balance state of the ediment,leading to local scour.Based on the form and movement of the scour,we can research the stability of column, providing reference for its designing.水利论文 w)jn`G3QfP

(W)sjQ0f0【论文关键词】 海洋平台; 局部流场; 绕流; FLUENT水利论文$Y4v0lg7i,NYO IlX
【英文论文关键词】 Deepwater platform; flow field; circumferential motion; FLUENT水利论文h q:X+T*q.b

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TAG: 流场 圆柱 王怡 朱红钧 桩脚
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