基于FlowVision的水平轴风力机偏航气动性能研究

Research of Yaw Aerodynamic Characteristic of Horizontal-Axis Wind Turbine Based FlowVision

为了能够准确的分析偏航条件下风力机的气动性能变化规律,本文应用FlowVision模拟了轴向来流和偏航下水平轴风力机气动性能的变化规律,并以TJ(?)EREBORG风力机为例进行验证,确认了数值分析的可靠性;在偏航风速条件下,数值计算结果可以很好地反映偏航下气动特征,偏航导致叶片气动性能和载荷分布的周期性波动,波动趋势近似余弦曲线,尾迹存在较为明显的偏斜现象。

In order to analysis the aerodynamic characteristic variation of wind turbine under yaw accurately.The influence of axial and yaw on the aerodynamic characteristic of horizontal-axis wind turbine is simulated using FlowVision in this paper.The simulation were compared with the experimental results of TJ AEREBORG at the same wind speeds to validate the reliability of the model at a given wind speed condition.In the yaw wind conditions,the results of numerical calculation can well predict the aerodynamic characteristics of yaw.Yaw leads to cyclical fluctuations of the blade aerodynamic performance and load distribution which approximates to a cosine curve.And obvious wake skew is observed.