Colloque

Wind tunnel simulation of groups of wind turbines and of the augmentation of the wind speed over hills

George I. Fekete

Membre a labase

George I. Fekete

Résumé du colloque

True scale models of vertical-axis wind turbines do not function at the small scales which are required for the simulation of groups of wind turbines in a wind tunnel. Previous investigators modelled vertical-axis wind turbines by static devices which produced straight wakes. Wind tunnel tests indicate that, when the wake deflection of full scale machines is reproduced, the mean flow energy content of the machines is increased by up to \( \approx 10\% \). The total power output of a group of machines is therefore likely to be higher than expected on the basis of previous tests. The power output of a given wind turbine increases as it is moved from flat land to the ridge of a hill. The wind speed augmentation potential of 2-D smooth and rough hills is studied in the wind tunnel for a wide range of hill height to boundary layer thickness ratios. Preliminary results agree well with predictions obtained when the potential flow velocity over the hill is combined, by the use of a composite matching technique, with the calculated boundary layer velocity.

Contexte

Section :

Génie mécanique/Industriel/Manufacturier

Thème du colloque :

Génie mécanique/Industriel/Manufacturier

Hôte : Université Laval

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Wind tunnel simulation of groups of wind turbines and of the augmentation of the wind speed over hi…

George I. Fekete