浓缩风能型风力发电机改进模型流场与功率输出特性(简报)

浓缩风能型风力发电机的流场具有特殊性，它的流场特性直接影响该类型风力发电机的性能。浓缩风能型风力发电机改进模型是由相似模型改进而成。采用车载法对改进模型的流场特性进行了试验并与原相似模型比较，研究表明：改进模型中央圆筒叶轮安装处流速增至来流流速的1.38倍，比原模型提高了5.34%；气流动能增至来流风能的2.65倍。采用车载法对改进模型功率输出特性进行了试验，当自然风速为 10.83 m/s时，叶轮转速额定，叶轮风能利用系数Cp为0.182，机组输出功率117.6 W，此时发电机效率为0.655，试验结果证明：叶轮安装处风速是前方相同面积来流风速的1.37倍，气流动能增至来流风能的2.57倍。试验为浓缩风能型风力发电机叶轮设计提供了重要依据。

Flow field and power output characteristic of the reformative model concentrated wind energy turbine

Due to the unique characteristics of the flow field of concentrated wind energy turbine, its characteristics of the flow field influence the performance of the concentrated wind energy turbine directly. The reformative model of concentrated wind energy turbine was converted from a resembled model. The flow field of reformative model was tested with outside truck-mounted method. The test showed that it was 1.38 times faster than natural speed of wind and higher than quondam model by 5.34% where the impeller was installed in the middle of the cylinder in the reformative model. The wind energy increased to 2.65 times. The power output characteristic test was carried out on reformative model in open truck. When natural speed was 10.83 m/s, the impeller arrived at its rated speed, the wind power utilization coefficient Cp got the value of 0.182 and the output power was 117.6 W. At the same time, the efficiency of generator could reach 0.655. The test results showed that it was 1.37 times faster than natural speed of wind where the impeller was installed in the middle of the cylinder in the reformative model. The wind energy increased to 2.57 times. It provides an important basis for turbine design of concentrated wind energy turbine.