The spectral signature of wind turbine wake meandering: A wind tunnel and field-scale study

Wind Energy ◽  
2018 ◽  
Vol 21 (9) ◽  
pp. 715-731 ◽  
Author(s):  
Michael Heisel ◽  
Jiarong Hong ◽  
Michele Guala
Keyword(s):  
Wind Tunnel ◽  
Wind Turbine ◽  
Spectral Signature ◽  
Field Scale ◽  
Turbine Wake ◽  
Wind Turbine Wake

scholarly journals Linear stability analysis of wind turbine wakes performed on wind tunnel measurements

2013 ◽  
Vol 737 ◽  
pp. 499-526 ◽  
Author(s):  
G. V. Iungo ◽  
F. Viola ◽  
S. Camarri ◽  
F. Porté-Agel ◽  
F. Gallaire
Keyword(s):  
Stability Analysis ◽  
Wind Tunnel ◽  
Wind Turbine ◽  
Linear Stability ◽  
Linear Stability Analysis ◽  
Rotational Velocity ◽  
Base Flow ◽  
Wind Tunnel Measurements ◽  
Turbine Wake ◽  
Wind Turbine Wake

AbstractWind tunnel measurements were performed for the wake produced by a three-bladed wind turbine immersed in uniform flow. These tests show the presence of a vorticity structure in the near-wake region mainly oriented along the streamwise direction, which is denoted as the hub vortex. The hub vortex is characterized by oscillations with frequencies lower than that connected to the rotational velocity of the rotor, which previous works have ascribed to wake meandering. This phenomenon consists of transversal oscillations of the wind turbine wake, which might be excited by the vortex shedding from the rotor disc acting as a bluff body. In this work, temporal and spatial linear stability analyses of a wind turbine wake are performed on a base flow obtained with time-averaged wind tunnel velocity measurements. This study shows that the low-frequency spectral component detected experimentally matches the most amplified frequency of the counter-winding single-helix mode downstream of the wind turbine. Then, simultaneous hot-wire measurements confirm the presence of a helicoidal unstable mode of the hub vortex with a streamwise wavenumber roughly equal to that predicted from the linear stability analysis.

scholarly journals Wind turbine wake interactions at field scale: An LES study of the SWiFT facility

2014 ◽  
Vol 524 ◽  
pp. 012139 ◽  
Author(s):  
Xiaolei Yang ◽  
Aaron Boomsma ◽  
Matthew Barone ◽  
Fotis Sotiropoulos
Keyword(s):  
Wind Turbine ◽  
Field Scale ◽  
Wake Interactions ◽  
Turbine Wake ◽  
Wind Turbine Wake

Wind tunnel study on wind and turbulence intensity profiles in wind turbine wake

2011 ◽  
Vol 20 (2) ◽  
pp. 127-132 ◽  
Author(s):  
Takao Maeda ◽  
Yasunari Kamada ◽  
Junsuke Murata ◽  
Sayaka Yonekura ◽  
Takafumi Ito ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Wind Turbine ◽  
Turbulence Intensity ◽  
Wind Tunnel Study ◽  
Turbine Wake ◽  
Wind Turbine Wake
Sign in / Sign up

Export Citation Format

Share Document