Field measurements in the wake of a model wind turbine

The Science of Making Torque from Wind 2014

Pol, Suhas^1,2 ; Taylor, Amelia^1,2 ; Bilbao, Argenis^3 ; Doostalab, Ali^1,2 ; Novoa, Santiago^1,3 ; Westergaard, Carsten^2 ; Hussain, Fazle^2 ; Sheng, Jian^3 ; Ren, Beibei^2 ; Giesselmann, Michael^3 ; Glauser, Mark^4 ; Castillo, Luciano^1,2

National Wind Resource Center, Whitacre College of Engineering, Texas Tech University, Lubbock, TX 79416, United States^1

Department of Mechanical Engineering, Whitacre College of Engineering, Texas Tech University, Lubbock, TX 79409, United States^2

Department of Electrical and Computer Engineering, Whitacre College of Engineering, Texas Tech University, Lubbock, TX 79409, United States^3

Departments of Mechanical and Aerospace Engineering, L.C. Smith College of Engineering and Computer Science, Syracuse University, Syracuse, NY 13244, United States^4

关键词: Atmospheric conditions;    Atmospheric variability;    Constant temperature;    Field measurement;    Inflow turbulence;    Load fluctuations;    Sonic anemometer;    Standard deviation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012175/pdf
DOI  :  10.1088/1742-6596/524/1/012175

来源: IOP

【 摘 要 】

As a first step to study the dynamics of a wind farm' we experimentally explored the flow field behind a single wind turbine of diameter 1.17 m at a hub height of 6.25 m. A 10 m tower upstream of the wind farm characterizes the atmospheric conditions and its influence on the wake evolution. A vertical rake of sonic anemometers is clustered around the hub height on a second tower' 6D downstream of the turbine. We present preliminary observations from a 1- hour block of data recorded in near-neutral atmospheric conditions. The ratio of the standard deviation of power to the inflow velocity is greater than three' revealing adverse effects of inflow turbulence on the power and load fluctuations. Furthermore' the wake defect and Reynolds stress and its gradient are pronounced at 6D. The flux of energy due to Reynolds stresses is similar to that reported in wind tunnel studies. The swirl and mixing produces a constant temperature wake which results in a density jump across the wake interface. Further field measurements will explore the dynamics of a model wind farm' including the effects of atmospheric variability.