Investigations for Improvement of Energy Yield of Rotor-blades from the 1.5 MW Class

The Science of Making Torque from Wind

Balaresque, N.^3 ; Bicker, S.^4 ; Dollinger, C.^5 ; Fandrich, A.^4 ; Gatz, S.^7 ; Hölling, M.^6 ; Irschik, K.^2 ; Reichstein, T.^7 ; Schaffarczyk, A.P.^7 ; Von Zengen, C.^1

Deutsche WindGuard GmbH, Varel, Germany^1

WindGuard Certification GmbH, Varel, Germany^2

Deutsche WindGuard Engineering GmbH, Bremerhaven, Germany^3

Deutsche WindGuard Offshore GmbH, Varel, Germany^4

BIMAQ, University of Bremen, Germany^5

University of Oldenburg, Germany^6

Kiel University of Applied Sciences, Kiel, Germany^7

关键词: Aerodynamic efficiency;    Aerodynamic properties;    Engineering gmbh;    Laser scanning systems;    Lift to drag ratio;    Vortex generators;    Wind tunnel models;    Wind turbine blades;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/7/072012/pdf
DOI  :  10.1088/1742-6596/753/7/072012

来源: IOP

【 摘 要 】

In a combined approach of extensive measurement and accompanying simulation a wind turbine blade used in the 1.5 MW class was investigated for improvement of aerodynamic properties and especially the energy yield. One blade was dismantled and its geometry was locally measured by a specially designed laser scanning-system. From this geometry data set five 2D wind tunnel models were manufactured and measured in the wind tunnel of Deutsche Wind Guard Engineering GmbH at Bremerhaven, Germany. In addition, extensive CFD investigations were performed to investigate the usefulness of so-called aerodynamic devices like vortex generators, Gurney flaps and others for improving energy yield. As a result it could be shown that the aerodynamic efficiency of the manufactured blades - if measured in terms of lift-to-drag ratio - is at a high level but still can be further improved. 3D CFD investigations were able to show the influence of Gurney flaps and boundary layer fences and their interactions.