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首页> 外文会议>Canadian Congress of Applied Mechanics(CANCAM 2007); 20070603-07; Toronto(CA) >Computational Fluid Dynamic Study in the Applicability of Wind Tunnel Testing for Horizontal Axis Wind Turbines
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Computational Fluid Dynamic Study in the Applicability of Wind Tunnel Testing for Horizontal Axis Wind Turbines

机译：计算流体动力学在水平轴风力发电机风洞试验中的适用性研究

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1) The wind tunnel models failed to converge to the same residual as the infinite domain model. The flow was then modeled as a transient flow. The results of the transient flow were analyzed using a Fourier transform. The flow throughout the domain exhibited a weak oscillatory component at the same frequenting. The period of oscillation corresponded to the time for the free stream flow to traverse the entire wind tunnel. This indicates that the dynamics of the wind tunnel itself are influencing the flow. The magnitude of the oscillation is small enough to be ignored. However if the oscillation was excited by the wind turbine rotation this could cause significant error in the flow. The experimenter must take care that the frequency of the wind turbine does not match that of the wind tunnel.
机译：1）风洞模型无法收敛到与无限域模型相同的残差。然后将该流建模为瞬时流。使用傅立叶变换分析了瞬态流动的结果。遍及整个域的流量在相同的频率下表现出较弱的振荡成分。振荡周期对应于自由流横穿整个风洞的时间。这表明风洞本身的动力学正在影响气流。振荡的大小足够小，可以忽略不计。但是，如果振荡是由风力涡轮机的旋转激发的，则可能导致流动中的明显误差。实验人员必须注意，风力涡轮机的频率与风洞的频率不匹配。

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