Abstract An increasing demand for energy implies the development of alternative, complementary, and renewable solutions. The idea developed in the present article consists in the use of vortex-induced vibrations to harness energy from low currents. The convertor modulus presented here is composed of an elastically mounted, rigid cylinder on end-springs, undergoing flow-induced motion when exposed to transverse fluid-flow. An experimental prototype was developed and tested in a free-surface water channel and is already able to recover energy with a good efficiency from free-stream velocity from 0.5 to 1 m/s. However, the large number of parameters (linked to automatic control, mechanical design, hydraulic parameters such as velocity of fluid flow) associated with its performance requires optimization. An analytical model is developed in order to accelerate the maximum efficiency determination, which is also estimated as a function of hydrodynamic forces. A complete 2D CFD model solution is then used, on one hand to validate the analytical model and on the other hand to determine lift, drag and added mass coefficients. Optimal control parameters are well estimated by the analytical model and CFD tests reveal a strong influence of high amplitude oscillations on the hydrodynamic coefficients.

中文翻译：

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基于涡激振动的控制参数对水电转换系统最大效率影响的分析和CFD研究

摘要 对能源日益增长的需求意味着可替代、互补和可再生解决方案的发展。本文中提出的想法包括使用涡激振动来利用来自低电流的能量。此处介绍的转换器模量由端部弹簧上的弹性安装的刚性圆柱体组成，当暴露于横向流体流动时，会发生流动引起的运动。在自由表面水通道中开发和测试了一个实验原型，并且已经能够从 0.5 到 1 m/s 的自由流速度以良好的效率回收能量。然而，与其性能相关的大量参数（与自动控制、机械设计、流体流速等液压参数相关）需要优化。开发了一个分析模型以加速最大效率的确定，该模型也被估计为水动力的函数。然后使用完整的 2D CFD 模型解决方案，一方面验证分析模型，另一方面确定升力、阻力和附加质量系数。分析模型很好地估计了最佳控制参数，CFD 测试揭示了高振幅振荡对水动力系数的强烈影响。