带失速延迟模型的改进型升力线法预测风力机性能

采用带Du-Selig静态失速延迟模型的改进升力线法对风力机不同来流风速下的性能进行预测,静态失速延迟模型可以弥补对输出功率的低估;还分析了来流风速在7.0~10.0m/s时沿径向的攻角分布以及有无失速延迟模型时的升阻力系数分布。通过比较发现在中间叶高处出现最大攻角,相应地在该叶高位置最先发生流动分离。

PERFORMANCE PREDICTION OF THE HAWT USING AN IMPROVED LIFTING LINE METHOD WITH A STALL DELAY MODEL

With the increasing output power of the individual horizontal axis wind turbine, the HAWT is designed at the state of the stall regulation. In this operation mode, it is difficult to predict accurately the performance of the HAWT. The improved lifting line method with the Du-selig stall delay model was used to predict the performance of the HAWT at various inflow wind speed. Du-selig stall delay model can improve the prediction accurate at the 7.0 ~ 10.0m/s inflow wind speed. It is found that highest attack angle occurs at the region at the blade midspan, thus the first occurrence of local blade stall is at the midspan blade at the 7.0 - 10.0m/s inflow wind speed.