伸缩叶片式垂直轴风机叶轮的数值仿真  

Numerical Investigation of A Novel Vertical Axis Wind Turbine with Controllable Blades

作　　者：毛昭勇[1] 田文龙[1] 丁文俊[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《西北工业大学学报》2015年第4期633-638,共6页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金(51179159)资助

摘　　要：为减小垂直轴阻力型风机叶轮在回程方向的阻力,提出了一种伸缩叶片式垂直轴风机叶轮方案,设计了叶片伸缩机构来控制叶片的径向位置,并给出了叶片的运动规律。为进一步探索该叶轮在工作状况下的力矩、功率特性,采用滑移网格技术对不同叶片数目的叶轮进行了二维计算流体动力学数值计算,并分析了实际工况下压力场的基本特点。结果表明:叶片力矩系数在进程方向为较大正值,而在回程方向保持在0值附近;四叶片叶轮在速比系数为0.4时获得最大平均功率系数0.244 9。In order to reduce the negative torque of drag-type vertical axis wind turbines （VAWTs） in the returning direction, a novel VAWT with retractable blades is proposed. Controlled by a link mechanism, the blades can be entirely hidden in the windshield in the returning direction and negative torques can then be considerably reduced. With the aim of further investigating the torque and power property of the turbine, two-dimensional computational fluid dynamics （CFD） simulations were carried out with a sliding mesh method. The effects of blade number and rotation speed were considered as well. The results and their analysis preliminarily demonstrated that the blade generates nearly no negative torque in the returning direction. The maximum averaged power coefficient is 0. 2449, obtained at a flow coefficient of 0. 4.

关 键 词：垂直轴 风机叶轮 伸缩叶片 计算流体力学 

分 类 号：TK730.2[交通运输工程—轮机工程]