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Dynamic hydroelastic scaling of self-adaptive composite marine rotors

机译：自适应复合船用转子动态水弹性尺度化

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The objective of this work is to establish dynamic similarity relationships for self-adaptive composite marine rotors. Although scaling laws are well established for rigid propellers and turbines, relative little work has been shown for flexible marine rotors that are designed to interact with the surrounding flow. Considering recent interests in the development of large-scale, energy-efficient composite marine propellers and turbines, it is crucial to understand the scaling relationships to properly design and interpret model-scale studies. Explanations of the similarity requirements are presented, along with scaling factors for the various fluid and structural parameters that control the dynamic interactions between the flexible rotor and the surrounding flow. Finally, numerical results obtained using a fully coupled, three-dimensional, boundary element method-finite element method is shown to demonstrate the validity of theoretical scaling relationships and to investigate scaling effects. The results suggest that for most marine rotors where gravitational forces are negligible compared to other dominant forces and the boundary layer is fully turbulent, it is most practical to conduct model-scale experiments to satisfy Mach number similarity, even though the Mach number will be much less than one for most marine applications.
机译：这项工作的目的是建立自适应复合船用转子的动态相似关系。尽管对于刚性螺旋桨和涡轮机已经很好地建立了比例定律，但对于设计用于与周围水流相互作用的柔性船用旋翼，工作量却很少。考虑到近期对开发大型，节能型复合船用螺旋桨和涡轮机的兴趣，了解比例关系以正确设计和解释模型比例研究至关重要。提出了相似性要求的说明，以及控制柔性转子与周围流之间的动态相互作用的各种流体和结构参数的比例因子。最后，显示了使用完全耦合的三维边界元方法-有限元方法获得的数值结果，以证明理论比例关系的有效性并研究比例效应。结果表明，对于大多数重力小于其他主导力且边界层完全湍流的船用转子，进行模型规模实验以满足马赫数相似性是最实际的，即使马赫数会很大对于大多数海洋应用而言，小于一。

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