中文摘要：

提出利用扰流来解决因局部方位角叶片攻角极小,而导致达里厄风力机整体性能较低的方法.采用多流管模型,预测扰流对风力机风能利用系数的影响规律,分析对在不同尖速比下赤道半径R和0.8R叶素攻角的影响规律.计算表明：在扰流的作用下,在最佳尖速比工况下,风力机风能利用系数提高了10％,且随尖速比增加,增幅继续增大,也扩大了风力机的运行尖速比范围.扰流增大了叶片攻角,在0°≤θ≤l5°内,攻角增幅随方位角的增加而增加;在175°≤θ≤180°内,随方位角的增加而减小.旋转半径相同时,尖速比越大,叶素攻角的增幅越小;同一尖速比下,叶素旋转半径越小,方位角175°≤θ≤180°内的叶素攻角增幅越大.

英文摘要：

The method of disturbance airflow was put forward to solve the problem of lower performance of Darrieus-type wind turbine caused by small angle of attack in parts of azimuth angles. Multiple stream-tube model was used to predict the influence rule of the disturbance airflow on power coefficient of Darrieus-type wind turbine and analyze the influence rule of blade element angle of attack with R and 0.8R rotating radius when the wind turbine running in the different tip speed ratios. The calculation shows that the power coefficient of wind turbine running in the best tip speed ratio can be improved by 10% with the action of disturbance airflow, and the amplitude continues enlarging with the increase of tip speed ratio, and the scope of running tip speed ratio of wind turbine also enlarges. The disturbance airflow increases the blade angle of attack, and the amplitude increases with the increase of the azimuth angle between 0° and 15°, but decreases in the scope of azimuth angle between 175° and 180°. When the wind turbine runs in the same rotation radius, the higher the tip speed ratio is, the lower the amplitude of blade element angle of attack is; Under the same tip speed ratio, the smaller the rotation radius of blade element is, the greater the amplitude of blade element angle of attack within azimuth of 175°≤θ≤180°is.