摘要
为了探究翼型对垂直轴水轮机水力效率的影响,基于叶素理论分析建立了垂直轴潮流水轮机在水槽中的物理模型,采用滑移网格技术在Fluent软件中对模型的流场进行了三维数值模拟。在保持转速一定、更改来流速度即改变叶尖速比的条件下,分析了两种不同NACA翼型直叶片的潮流水轮机内部流场以及水力性能。结果表明,翼型以及叶片安装角对垂直轴潮流水轮机的利用效率影响很大,其流动特性与来流速度、叶片布置形式有重要联系,为新型潮流水轮机的设计和翼型的选择应用提供了依据。
This paper establishes an advanced vertical axis tidal turbine model to study the influence of airfoil profile on turbine efficiency. According to the theory analysis, three-dimensional numerical simulation has been carried out in Fluent by using sliding mesh method. The inner flow field and hydraulic characteristics of water turbine based on two- type NACA blade profiles have been studied with a constant rotational blade velocity and different inflow velocity. It has been found that the airfoil profile and stagger angle of blade play an important role in turbine efficiency while the flow characteristics are closely related to inflow velocity and the blade layout. The study offers basis to select airfoil profile and design new tidal current water turbine.
出处
《水电能源科学》
北大核心
2014年第7期140-143,119,共5页
Water Resources and Power
基金
国家自然科学基金重点项目(51137002)
江苏省基础研究计划重点研究专项基金项目(bk2011026)
关键词
潮流水轮机
水力性能
翼型
数值模拟
tidal current turbine
hydraulic performance
airfoil profile
numerical simulation
