为提升升力型垂直轴风力机的启动性能,将阻力型叶片与风力机横撑相结合,提出一种新型阻力型横撑,形成一种升阻力混合垂直轴风力机。通过计算流体力学方法分析阻力型横撑对该风力机在不同转速下气动性能的影响。结果表明阻力型横撑在低转速下可有效增加风力机转矩,提升风力机的启动性能;在额定转速下略微降低风力机转矩;在高转速下大幅降低风力机转矩,发挥气动刹车的作用。随着横撑上阻力型叶片长度占比的增加,低转速下风力机启动性能的提升效果增强;额定转速下风力机转矩会进一步下降,升力型叶片气动性能无明显变化。
Abstract
In order to improve the starting performance of lift-type vertical axis wind turbines, this study combines drag-type blades with the cross braces of the wind turbine and proposes a new type of drag-type cross brace, thus forming a lift-drag hybrid vertical axis wind turbine. Computational fluid dynamics（CFD） method is used to analyze the impact of the drag-type cross brace on the aerodynamic performance of the wind turbine at different rotational speeds. The results show that the drag-type cross brace can effectively increase the torque of the wind turbine at low rotational speeds and improve the starting performance of the wind turbine. At the rated rotational speed, it slightly reduces the torque of the wind turbine. At high rotational speeds, it significantly reduces the torque of the wind turbine and plays the role of an aerodynamic brake. With the increase in the length proportion of the drag-type blades on the cross brace, the improvement in the starting performance of the wind turbine at low rotational speeds is enhanced. At the rated rotational speed, the torque of the wind turbine further decrease, while there is no significant change in the aerodynamic performance of the lift-type blades.
关键词
垂直轴风力机 /
阻力型叶片 /
升阻力混合风力机 /
风能利用系数 /
启动性能
Key words
vertical axis wind turbine /
drag blade /
drag-lift hybrid wind turbine /
coefficient of power /
starting performance
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基金
深圳市2022年技术攻关重点项目（JSGG20220831110803006）; 南方电网重点科技项目——海洋能发电平台及关键部件的稳定性控制及安全评估技术（NYJS2020KJ005-26）
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