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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≤15?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。
It is proposed to use spoiler to solve the problem that the angle of attack of local azimuth blade is extremely small and the overall performance of Dalyan wind turbine is low. The multi-flow pipe model was used to predict the influence of the spoiler on the wind power utilization coefficient. The influence of the angle of attack on the equatorial radii R and 0.8R at different tip velocities was analyzed. The calculation results show that under the condition of spoiler flow, the wind energy utilization coefficient of wind turbines increases by 10% under the condition of the best tip speed ratio, and the increase continues to increase as the tip speed ratio increases, which also enlarges the running tip of the wind turbine Speed ratio range. The spoiler increases the angle of attack of the blade, and the angle of attack increases with the increase of azimuth angle within 0? ≤θ≤15 ?, and decreases with the increase of azimuth within 175? ≤θ≤180?. When the radius of gyration is the same, the greater the tip-to-tip ratio is, the smaller the increase of the angle of attack of the blade is. The smaller the radius of rotation of the blade is, the more the angle of attack of the blade increases with the azimuth of 175 ≤ θ ≤ 180 ° Big.