Study on approach of performance improvement of VAWT employing double multiple stream tubes model
Study on approach of performance improvement of VAWT employing double multiple stream tubes model
复制标题
双流管模型提高垂直轴风力机性能途径研究
DOI：
10.1063/1.4979356
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发表时间：
2017-03
影响因子：
2.5
通讯作者：
Zheng Yuan
中科院分区：
文献类型：
--
作者：
Zhao Zhenzhou;Yan Chang;Wang Tongguang;Xu Bofeng;Zheng Yuan
在达里厄斯型垂直轴风力发电机（VAWT）的圆形叶片路径上，有两个方位角位置扭矩较小甚至为负。这两个方位角的气动性能最低，极大削弱了垂直轴风力机的整体性能。提出了一种通过在两个方位角施加两个额外气流来重建涡轮叶片流场的方法，以增强局部性能。目的是提高垂直轴风力发电机的整体功率系数。对直径为 2 m、高度为 2 m 的 Φ 型 VAWT 进行了研究，以评估所提方法的有效性。利用双多流管模型研究了附加气流对叶片和涡轮气动性能的影响。仿真结果表明，额外气流有效提升了旋翼叶片和整体旋翼的性能；在最佳叶尖速比下，最大功率系数增加了 6%。一些规则...
On the circular blade path of a Darrieus-type vertical axis wind turbine (VAWT), there are two azimuth positions where torques are small or even negative. These two azimuths have the lowest aerodynamic performance and greatly weaken the overall performance of the VAWT. An approach is proposed to rebuild the flow field of the turbine blades by applying two additional airflows at the two azimuths to enhance the local performance. The aim is to improve the overall power coefficient of the VAWT. A Φ-type VAWT with a diameter of 2 m and a height of 2 m is studied to evaluate the effectiveness of the proposed approach. The effect of additional airflow on the aerodynamic performance of the blade and the turbine is researched using the double multiple streamtube model. The simulation results suggest that the additional airflows are effective in promoting the performance of the rotor blades and the overall rotor; the increase in maximum power coefficient achieved was 6% at an optimum tip speed ratio. Some rules of...
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