海洋串列立管绕流流场参数分析  

CFD-baesd Investigation on Parameter for Flow Field around Tandem Offshore Risers

作　　者：盛磊祥 陈国明 许亮斌 

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

出　　处：《中国造船》2010年第A02期21-27,共7页Shipbuilding of China

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）;国家高技术研究发展计划（863）课题（2006AA09A106-4）.

摘　　要：利用流体动力学方法，分析串列布置立管流场特征，研究雷诺数和串列立管间距对流场的影响，分析上游和下游立管流场参数，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。分析发现由于处于上游立管的尾流低压区，下游立管尾流压力相对升高，曳力系数较小，甚至出现负值；当立管间距较大时，上游立管尾流的周期性变化造成下游立管迎流面压力波动，因此除了传统的横向涡激振动之外，下游立管流向也会产生周期性振动的现象。Tandem arrangement is one of the basic riser arrangement forms. Based on CFD theory, the flow field feature of tandem risers is investigated. Considering the effect of Re number and distance between the tandem risers on the flow field, which is changed by the flow field parameters of upstream and downstream risers including lift coefficient, drag coefficient and St, are illustrated, and compared with the isolated riser. The necessary flow field parameters for the analysis on the VIV of tandem risers are presented, and the relevant conclusions can provide a reference to the VIV analysis of riser group. It is concluded that due to the effect of the wake behind the upstream riser, the drag force of downstream riser is lower, even less than zero. When the distance is far, the wake oscillation of upstream makes the downstream riser tend to vibration in the flow direction.

关 键 词：串列立管 升力系数 曳力系数 涡激振动 CFD 

分 类 号：V435.23[航空宇航科学与技术—航空宇航推进理论与工程]