论文部分内容阅读
本文利用热线风速仪测量了低速风洞内均匀入流风况下风力机模型后不同流向位置处的尾流流场。通过分析平均速度和湍流强度廓线,可以发现随着远离转子,湍流强度和速度亏损逐渐减小,尾流区轴向速度逐渐增大。由于塔架塔影效应影响,转子下侧速度偏低,湍流强度偏大,因而不可忽略塔架对于小型风力机近尾流特性的影响。
The hot-wire anemometer was used in this paper to measure the wake flow field at different flow positions after the wind turbine model was uniformly inflow in the low-speed wind tunnel. By analyzing the average velocity and the turbulence intensity profile, it can be found that as the distance from the rotor decreases, the turbulence intensity and velocity loss gradually decrease and the wake velocity in the wake region increases gradually. Due to the shadow effect of the tower tower, the speed of the lower side of the rotor is low and the intensity of the turbulence is large, therefore, the influence of the tower on the wake characteristics of the small wind turbine can not be neglected.