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为探明直线翼垂直轴风力机的叶片个数对其起动性的影响,设计制作了可更换叶片个数(1～5枚)的风力机模型,通过风洞实验获得了起动力矩与转角的关系曲线,并与用单叶片力矩模拟的结果进行了对比。接着又制作了1台3叶片小型风力机模型,进行了烟线法可视化实验,获得了不同转角下的风力机周围流场迹线图。两项实验结果表明:增加叶片个数可使风力机平均起动性提高,但叶片间相互影响也增加,不同角度下各叶片周围流场受影响程度不同,对叶片受力和风力机起动力矩的影响程度和趋势也不同。
In order to find out the influence of the number of blades on the straight-wing vertical-axis wind turbine on its starting performance, a wind turbine model with 1 ~ 5 replaceable blades was designed and manufactured. Wind turbine tests were conducted to obtain the starting torque and angle The relationship curves are compared with the results of single-blade moment simulation. Then a 3-blade small wind turbine model was made and a visualization experiment of the smoke line method was carried out to obtain the flow field trace around the wind turbine at different rotation angles. Two experimental results show that: increasing the number of blades can increase the average starting ability of the wind turbine, but the mutual influence between the blades also increases. The flow field around the blades is affected by different angles, and the influence of the blade force and the starting torque of the wind turbine The impact and trend are also different.