| Popis: |
In the framework of the JOULE-0064 'Full-scale Measurements in Wind Turbine Arrays' in the period between June-November 1992 measurements have been performed in the Sexbierum Wind Farm. The aim of the measurements is to provide data for the validation of wake and wind farm models, which are being developed simultaneously, and to provide input data for wind turbine load calculation programmes. The campaign concerned measurement of the wind speed, turbulence and shear stress behind a single wind turbine at distances of 2.5,5.5 and 8 rotor diarneters, respectively. Besides detailed measurements of the wind field, the power of the turbine was measured. A database has been compiled containing 1-minute averaged values of the measured quantities. The database was analysed using a two-dimensional bin analysis with respect to the undisturbed wind direction and wind speed. The analysis contains horizontal and vertical profiles of the: - U-,V-, and W-component of the wind in the wake; - turbulence intensities in three directions and turbulent kinetic energy in the wake; - shear stresses u'v', u'w' and v'w' in the wake. These quantities are presented both in dimensional as in non-dimensionalized form. With the data base a useful set of data is created for the validation of wake and wind farm models. |
