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Numerical Fluid-Structure Interaction Analysis of a Wells Turbine With Flexible Blades

机译:柔性叶片井涡轮机的数值流体结构相互作用分析

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Direct energy conversion from ocean waves requires some method of rectifying the oscillatory motion to produce a unidirectional output. The Wells turbine accomplishes this with horizontally mounted symmetric blades, which produce a net torque output when combined with an oscillating water column. Previous studies have been conducted, which investigate the effects of blade profile, turbine solidity, stator tip gap clearance, and a number of guide vane designs intended to improve performance. Both experimental and computational methods have been employed, with computational models typically relying on commercially available computational fluid dynamics (CFD) code and assuming steady-state flow conditions. In this work, the open-source code foam-extend is used to study the transient behavior of a Wells turbine, with both a standard rigid blade and a blade with a flexible trailing edge. A validated model is established, and the effects of various Young's Moduli are tested and their flow fields analyzed. Significant performance gains are realized, with a nearly 17% increase in output torque in some cases.
机译:来自海浪的直接能量转换需要一些矫正振荡运动以产生单向输出的方法。井筒涡轮机通过水平安装的对称刀片完成,当与振荡水柱结合时产生净扭矩输出。已经进行了以前的研究,该研究研究了叶片轮廓,涡轮稳定度,定子尖端间隙间隙的影响,以及旨在提高性能的许多导向叶片设计。已经采用了实验和计算方法,并且计算模型通常依赖于商业上可获得的计算流体动力学(CFD)代码并假设稳态流动条件。在这项工作中,开源代码泡沫延伸用于研究井涡轮机的瞬态行为,标准刚性刀片和具有柔性后缘的叶片。建立了验证的模型,测试了各种杨氏模数的效果,并分析了流场。在某些情况下,实现了显着的性能提升,在输出扭矩增加近17%。

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