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Offshore and onshore wind turbine wake meandering studied in an ABL wind tunnel
Scaled wind turbine models have been installed in the VKI L1-B atmospheric boundary layer wind tunnel at offshore and onshore conditions. Time-resolved measurements were carried out with three component hot wire anemometry and stereo-PIV in the middle vertical plane of the wake up to eleven turbine diameter downstream. The results show an earlier wake recovery for the onshore case. The effect of inflow conditions and the wind turbine’s working conditions on wake meandering was investigated. Wake meandering was detected by hot wire anemometry through a low frequency peak in the turbulent power spectrum, present in the entire wake mainly for offshore inflow condition. It was found that the Strouhal number, based on the rotor diameter and the wind velocity at hub height, was in the order of 0.25. Below the meandering frequency, turbulence power spectrum decreased, whereas above it increased. Wake meandering did not persist strongly further downstream in the wind farm layout studied.
Offshore and onshore wind turbine wake meandering studied in an ABL wind tunnel
Scaled wind turbine models have been installed in the VKI L1-B atmospheric boundary layer wind tunnel at offshore and onshore conditions. Time-resolved measurements were carried out with three component hot wire anemometry and stereo-PIV in the middle vertical plane of the wake up to eleven turbine diameter downstream. The results show an earlier wake recovery for the onshore case. The effect of inflow conditions and the wind turbine’s working conditions on wake meandering was investigated. Wake meandering was detected by hot wire anemometry through a low frequency peak in the turbulent power spectrum, present in the entire wake mainly for offshore inflow condition. It was found that the Strouhal number, based on the rotor diameter and the wind velocity at hub height, was in the order of 0.25. Below the meandering frequency, turbulence power spectrum decreased, whereas above it increased. Wake meandering did not persist strongly further downstream in the wind farm layout studied.
Offshore and onshore wind turbine wake meandering studied in an ABL wind tunnel
Barlas, Emre (author) / Buckingham, Sophia (author) / Glabeke, Gertjan (author) / van Beeck, Jeroen (author)
2015-01-01
Barlas , E , Buckingham , S , Glabeke , G & van Beeck , J 2015 , Offshore and onshore wind turbine wake meandering studied in an ABL wind tunnel . in Proceedings. International Workshop on Physical Modeling of Flow and Dispersion Phenomena (PHYSMOD) . International Workshop on Physical Modeling of Flow and Dispersion Phenomena , Zürich , Switzerland , 07/09/2015 .
Article (Journal)
Electronic Resource
English
DDC:
690