均匀人流风力机模型尾流特性实验研究

Experimental Study of Characteristics of Wake of Wind Turbine Model in Uniform Inflow

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 wake field at different streamwise positions behind wind turbine model were measured with hot wire anemometer in low speed wind tunnel.The turbulence intensity and velocity deficit decreased when it was far away from the rotor and the axial velocity in wake zone would increase.The velocity was smaller and the turbulence intensity was greater in lower region of the rotor due to tower shadow effect and the effect of tower on wake effect could not be neglected.