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下倾管-立管组合系统内严重段塞流动数值分析

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海洋立管常被用于水下井口与浮式平台的连接,混输油气在立管段易出现严重段塞流,对下游设备及管道产生超负荷的冲击与破坏.该文建立了立管三维数值模型,利用计算流体力学方法对气液严重段塞流动过程进行了模拟.结果表明:严重段塞流的演变周期、喷发时间、压力波动幅值和液塞长度均随气速的增加而减小,流型也逐渐从SSI型严重段塞流向SSⅡ型和SSⅢ型转变;在气体喷发阶段,立管内气塞呈"s"型运动,且气塞的流通区域与高速区重合,高速区分别位于立管底部和顶部弯头的内壁面与管轴处,SSI型严重段塞流的高速区大于SSⅡ型和SSⅢ型.
Numerical Study on Severe Slug Flow in Declined Pipe-Riser System
Marine risers are often used to connect underwater wellheads with floating platforms.Oil and gas mixed transportation is prone to severe slug flow in the riser section,which will cause overload impact and damage to downstream equipment and pipelines.In this paper,a three-dimensional numerical model of the riser is established,and the computational fluid dynamics method is used to simulate the gas-liquid severe slug flow process.The results show that the evolution period,eruption time,pressure fluctuation amplitude and liquid slug length of severe slug flow decrease with the increase of gas velocity,and the flow pattern gradually changes from SSI severe slug to SSⅡ and SSⅢ.During the gas eruption stage,the gas plug in the riser moves in s shape,and the flow area of the gas plug coincides with the high-speed area.The high-speed area is located at the inner wall surface and the tube shaft of the elbow at the bottom and top of the riser,respectively.The high-speed area of severe slug flow in SSI is greater than that ofSSⅡ and SSⅢ.

Declined pipe-riser systemTwo-phase flowSevere slugFlow characteristic3-D numerical modeling

朱红钧、李佳男、高岳

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西南石油大学石油与天然气工程学院,成都 610500

下倾管立管系统 两相流 严重段塞流 流动特性 三维数值模拟

国家自然科学基金四川省杰出青年科学基金四川省中央引导地方科技发展专项

519792382023NSFSC19532023ZYD0140

2024

水动力学研究与进展A辑
中国船舶科学研究中心

水动力学研究与进展A辑

CSTPCD北大核心
影响因子:0.594
ISSN:1000-4874
年,卷(期):2024.39(3)