水平轴潮流能水轮机尾流特性研究  

Study on the wake characteristics of horizontal axis tidal current turbine

作　　者：朱善强 李广年 李振琦 郭海鹏 Zhu Shanqiang;Li Guangnian;Li Zhenqi;Guo Haipeng(Faculty of Maritime and Transportation,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学海运学院,浙江宁波315211

出　　处：《可再生能源》2022年第2期278-284,共7页Renewable Energy Resources

基　　金：国家自然科学基金项目(52171263)。

摘　　要：文章以水平轴潮流能水轮机为研究对象,采用CFD方法对水轮机的尾流特性进行分析。通过网格无关性验证与已发表文献的比对,验证了CFD方法的精度。通过不同叶尖速比下的水轮机性能曲线,进一步分析了水轮机的尾流场速度分布特征。通过分析尾流场中轴向、径向和切向速度的分布特点,研究了水平轴潮流能水轮机尾流的微观结构特征及其演化规律。研究结果表明:尾流横向影响范围在以中心轴线为中心的1D范围内;在近尾流处,尾流速度具有周期性,轴向速度随着尾流下移而逐渐减小;在尾流旋转过程中,径向速度向外扩散并逐渐衰减,切向速度分量沿轴向逐渐衰减。In this paper,taking the horizontal axis tidal current turbine as the study object,the wake characteristics of the turbine is analyzed by using CFD method.Through the grid independence verification and the comparison with the published literature,the effectiveness of the adopted numerical method is validated.Based on the obtained turbine performance curves,the velocity distribution characteristics of the wake field under different tip speed ratios are analyzed.Combined with the distribution features of axial,radial and tangential velocities in wake field,the microstructure characteristics and evolution of the wake flow of the horizontal axis tidal current turbine are discussed.The results suggest that the radial range of wake influence is one time radius with the central axis as the center;the axial,radial,and tangential components of the wake are with obvious circumferential periodicity near the turbine,and they are reduced with the increasing axial distance.

关 键 词：潮流能 水轮机 数值模拟 尾流特性 

分 类 号：TK71[动力工程及工程热物理—流体机械及工程]