高阻尼涡激振动增强机理研究

项目名称： 高阻尼涡激振动增强机理研究

项目编号： No.51309038

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 水利工程

项目作者： 李小超

作者单位： 长沙理工大学

项目金额： 25万元

中文摘要： 涡激振动水生清洁能源是一种基于最大限度增强和利用涡激振动这样一个全新概念，从水流中提取能量的新能源技术。本项目将采用量纲分析方法对水流、振动体、能量转换装置负载之间的动力耦合作用进行分析，确定在实验模拟中应遵循的相似准则，在此基础上研制实验模拟装置；针对海洋中水流流速较低、流向多变的特点，通过理论分析、模型试验和数值计算，得到各项参数对涡激振动能量转换装置水动力性能的影响规律，研究振动体周围流场变化、旋涡脱落模式、旋涡强度、流体力与振动响应和能量提取之间的关系，提出有效的参数优化措施，增强涡激振动，以便在维持较大振幅和频率锁定范围的同时使能量提取最大化；在上述研究基础上，提出振动体模块结构设计方法，探讨涡激振动能量转换装置在我国海洋中的应用。

中文关键词： 涡激振动；能量转换；水流；海洋能；水动力特性

英文摘要： Vortex-induced vibration (VIV) is a well-known fluid flow phenomenon studied in multiple engineering disciplines and typically sought to be minimized. However, a promising new technology that utilizes VIVs in water to extract energy from water flows in oceans and rivers has recently been proposed. The VIV based power generating system is based on the idea of maximizing rather than spoiling vortex shedding and exploiting rather than suppressing VIV. Our project seeks to enhance VIV to maximize energy harnessing at high damping while maintaining a high VIV amplitude and synchronization range. The method of dimensional analysis will be used to analyze the interaction between water flow, oscillator and power take-off for energy extraction, and the similarity laws that should be followed in the small scale laboratory experiments will be established. An experimental apparatus for simulating the interaction between water flow, oscillator and power take-off will be thereby designed and constructed. Considering the flow velocity is low and the flow direction is variable for water flows in oceans, theoretical analysis, model tests and numerical computations will be performed to obtain the effect of the various parameters on the hydrodynamic performance of VIV energy converter. The relationship between flow field, vortex s

英文关键词： Vortex-Induced Vibration；Energy Extraction；Water Flow；Ocean Energy；Hydrodynamic Characteristics