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首页> 外文会议>OCEANS 2016 MTS/IEEE Monterey >Experimental investigation of cross flow - inline coupled Vortex-Induced Vibration on riser with finite length buoyancy module
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Experimental investigation of cross flow - inline coupled Vortex-Induced Vibration on riser with finite length buoyancy module

机译：具有有限长度浮力模块的横流内联耦合涡旋涡流振动的实验研究

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Vortex-Induced Vibrations (VIV) is a ubiquitous phenomenon caused by shedding vortices behind bluff bodies. VIV induced by ocean currents and waves generates fatigue damage in riser systems. This disturbance creates a big challenge for designing ocean exploration systems. A key feature in determining VIV is the shape and size of the bluff bodies. Therefore, a new design shape, riser section with buoyancy modules of low span to diameter ratio (to serve as weight compensators), requires special attention because hydrodynamic performance is extensively altered in comparison with a bare riser section. A series of extensive forced inline-crossflow VIV experiments on riser models with varying buoyancy module setup were designed and carried out in the MIT Towing Tank. These experiments formulated a new inline-cross-flow VIV hydrodynamic coefficient database for buoyancy module of low span to diameter ratio, which can be included in semi-empirical VIV prediction programs. Several key features of database, including added mass coefficients, lift and drag force coefficients in phase of velocity, etc., were systematically analyzed.
机译：涡激振动（VIV）是由脱落的流线型体后面的旋涡一种普遍存在的现象。 VIV通过洋流和波浪引起的生成立管系统的疲劳损伤。这种干扰创建设计海洋勘探系统的一大挑战。在确定VIV一个关键特征是该非流线型体的形状和尺寸。因此，一个新的设计形状，具有低跨度直径比（作为重量补偿器）的浮力模块立管部分，需要特别注意，因为水动力性能被广泛相比与裸立管段改变。在立管模型的一系列广泛的强制内联横流VIV实验了不同的浮力模块设置在设计和麻省理工学院的拖曳水池中进行。这些实验制定了新的内联交流VIV液力系数低跨度浮力模块与直径比，这可以包括在半经验VIV预测程序的数据库。数据库的一些关键功能，包括附加质量系数，升力和阻力系数速度等的阶段，进行了系统的分析。

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