Savonius型垂直轴风力机叶型优化设计  

Optimization Design of Savonius Vertical Axis Wind Turbine Blade

作　　者：汪泉[1] 王环均 杨书益 王冯云 WANG Quan;WANG Huanjun;YANG Shuyi;WANG Fengyun(School of Mechanical Engineering,Hubei Univ.of Tech.,Wuhan 430068,China)

机构地区：[1]湖北工业大学机械工程学院,湖北武汉430068

出　　处：《湖北工业大学学报》2023年第4期11-17,共7页Journal of Hubei University of Technology

基　　金：国家自然科学基金(51975190)。

摘　　要：为探索叶型形状对Savonius型垂直轴风力机性能的影响,得到较优叶型以提高其风能利用率,以回旋式Savonius型垂直轴风力机的风轮主体为研究对象,提出了基于三角函数的垂直轴风力机叶型廓线表达方法,并根据该方法设计出两种新型垂直轴风力机叶型。采用CFD数值计算方法来计算优化叶型的功率系数,从功率系数、力矩系数、压力分布、速度分布和涡量分布这5个方面讨论优化叶型较初始叶型的优越性。结果表明:在来流风速为14 m/s的环境中,当叶尖速比为1.3时,风轮最大功率系数值为0.283,提升了约16%,并且在叶尖速比高达1.8时,仍然保持较高的功率系数。本研究对垂直轴风力机叶片选型提供参考依据,对于提高垂直轴风力机的功率特性具有一定的理论意义与工程应用价值。In order to explore the influence of blade shape on the performance of Savonius vertical axis wind turbine,a better blade shape was obtained to improve its wind energy efficiency.In this study,Savonius type rotary vertical axis wind turbine was taken as the research object,and the expression method of vertical axis wind turbine blade profile based on trigonometric function was put forward,and two new vertical axis wind turbine blade profiles were designed according to this method.CFD numerical calculation method is used to calculate the power coefficient of the optimized blade profile.Finally,the advantages of the optimized blade profile over the initial one are discussed from five aspects:power coefficient,torque coefficient,pressure distribution,velocity distribution and vorticity distribution.The results show that in the environment of incoming wind speed of 14m/s,the power coefficient reaches the maximum when blade tip speed ratio is 1.3,and the maximum power coefficient is 0.283,an increase of about 16%.When the tip speed ratio is as high as 1.8,the power coefficient is still high.This study provides a reference for the selection of vertical axis wind turbine blades,and has a certain theoretical research significance and engineering application value for improving the power characteristics of vertical axis wind turbine.

关 键 词：Savonius型垂直轴风力机 优化叶型 功率系数 三角函数 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]