海洋并列立管涡激振动参数分析  

Flow Field Parameter Analysis of VIV on Offshore Risers in Side by Side Arrangement

作　　者：盛磊祥[1,2] 陈国明[1] 

机构地区：[1]中国石油大学(华东)海洋油气装备与安全技术研究中心,山东东营257061 [2]中海油研究总院,北京100027

出　　处：《石油矿场机械》2011年第3期5-8,共4页Oil Field Equipment

基　　金：国家科技重大专项课题"深水油气田开发钻完井工程配套技术"(2008ZX05026-001-07)

摘　　要：利用流体动力学(CFD)方法,分析并列布置立管流场的特征;研究雷诺数和并列立管间距对流场的影响;分析上下侧立管流场参数,包括升力系数、曳力系数、斯特劳哈数等变化规律,并与孤立立管流场参数进行对比,为并列布置立管涡激振动分析提供必要的流场参数,同时为立管群涡激振动分析提供参考。分析发现,并列立管之间的相互作用会使漩涡泄放增强,导致两管柱升、曳力系数升高。因此海洋多立管常规分析方法中,忽略管柱相互影响计算的升曳力是不准确的,具有一定的风险性。Side by side arrangement is one of the basic riser arrangement forms. Based on CFD theory,the flow field feature of side by side risers is analyzed. Considering the effect of Reynolds number and distance between the side by side risers on the flow field, the change law of flow field parameter of upstream and downstream risers including lift coefficient, drag coefficient and St, were illustrated, and compared with the isolated riser. The relevant conclusions provide the necessary flow field parameters for the analysis on the VIV of side by side risers,and a reference to the VIV analysis of riser group. It was concluded that the interaction of side by side risers made the strength of the wake, which resulted the increase of lift and drag force. As a result, the force ignoring the interaction is nonconservative and risky.

关 键 词：并列立管 升力系数 曳力系数 斯特劳哈数 CFD 

分 类 号：TE95[石油与天然气工程—石油机械设备]