自由液面条件下水平轴水轮机流固耦合分析
Fluid Structure Interaction Analysis of Horizontal Axis Hydroturbine with Free Surface
黄瑞璋 1王树齐 1陆雨婷 1陈思远 1周效国1
作者信息
- 1. 江苏科技大学船舶与海洋工程学院,江苏镇江 212100
- 折叠
摘要
潮流能水轮机一般安装在自由液面附近,导致水轮机的水动力特性受到自由面的影响.同时水轮机大型化后面临叶片的结构变形,进而影响水轮机的水动力性能.采用ANSYS软件中Fluent和Transient Structure模块,通过改变叶尖浸没水深,对水平轴水轮机在自由面条件下的流固耦合展开研究.结果表明:基于双向流固耦合计算得到的能量利用率比基于单向流固耦合的低,而轴向荷载系数比基于单向流固耦合的高;叶片在叶尖处变形较大,并在叶片与轮毂连接处有应力集中;水轮机能量利用率、轴向荷载系数和叶片最大变形随旋转角度发生周期性波动,且波动幅值随叶尖浸没水深的增加而减少.研究结果可为水轮机的叶片设计提供参考.
Abstract
Tidal energyturbines are generally installed near the free surface,resulting in the hydrodynamic characteristics of the hydroturbine being affected by the free surface.At the same time,the large-scale hydroturbine faces structural deformation of the blades,which in turn affects the hydrodynamic performance of the hydroturbine.The fluent and transient structure modules in ANSYS software is applied to study the fluid structure interaction of a horizontal axis hydroturbine under free surface conditions by changing the submerged depth of the blade tip.The results show that the energy efficiency calculated based on bidirectional fluid structure interaction is lower than that based on unidirectional fluid structure interaction,while the axial load coefficient is higher than that based on unidirectional fluid structure interaction.The deformation of the blade at the blade tip is greater,and there is stress concentration at the connection between the blade and the hub.The power and axial load coefficients,and maximum deformation of the turbine blades fluctuate periodically with the rotation angle,and the amplitude of the fluctuation decreases with the increase of the immersion depth of the blade tip.The conclusions obtained from the study can provide references for blade design.
关键词
水平轴水轮机/能量利用率/轴向荷载系数/流固耦合/自由液面Key words
horizontal axis hydroturbine/energy efficiency/axial load coefficient/fluid structure interaction/free surface引用本文复制引用
出版年
2024
NETL
NSTL
万方数据