为研究垂直轴风力机叶片表面结冰的规律以及结冰对其性能的影响，对采用NACA0018翼型的风力机叶片进行了风洞结冰试验研究。在风洞试验段内安装了喷水装置，室外的寒冷空气被吸入风洞后与过冷水滴一起吹向叶片并碰撞结冰。测试了不同水滴流量和叶片攻角下的叶表结冰分布及叶片的升阻力系数变化。在一定攻角范围内，叶表结冰量随翼型迎风面积增加而增加；结冰后的阻力系数增大，升力系数减小，叶片的气动特性降低。
In order to study the mechanism of icing on blade surface and performance effects on vertical axis wind turbine, icing test was carried out on NACA0018 airfoil by using a wind tunnel. A water spray nozzle was set in outlet of wind tunnel. The supercooled water droplet mixed in the air absorbed from outside attacked on blade surface and turned into icing. The icing distribution and the changes of lift-drag coefficients were tested under different water flow discharges and attack angles of blade. In certain range of attack angle, the ice amount increases with the increasing of projected area of blade against wind. The drag coefficient of blade increased while lift coefficient decreased under icing condition, which means that the aerodynamic performance decreased generally.
参考文献
| [1] | Measurement method and results of ice adhesion force on the curved surface of a wind turbine blade[J].Renewable energy,2010(4):741. |
| [2] | Andrea G. Kraj;Eric L. Bibeau .Phases of icing on wind turbine blades characterized by ice accumulation[J].Renewable energy,2010(5):966. |
| [3] | 杨柏松,李岩,冯放,李声茂.直线翼垂直轴风力机静态叶片结冰的观测与分析[J].可再生能源,2009(06):20-23. |
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