Titel: Presentations from “The Bolund Experiment: Workshop” 3-4th December 2009
Författare/Author: Andreas Bechmann (ed.)
Utgivare/Publisher: Risø DTU National Laboratory for Sustainable Energy, Technical University of Denmark
Årtal/Year: 2010
Ämnesord: Mekanik och aerodynamik
Sökord: Bolund; resource assessment; flow model; physical modeling; CFD; LES
Rapport via Risø DTU National Laboratory for Sustainable Energy, Technical University of Denmark
Sammanfattning/Abstract: The wind industry is increasingly relying on a large number of different micro-scale models for resource assessment of sites in complex terrain. There is, however, no consensus from the wind energy community on a standardized methodology for resource assessment modeling. The difficulties in providing guidelines are twofold: The experimental data available for validating the flow models is very limited and no systematic comparison of different flow models exist. With the Bolund Experiment both of these difficulties are approached.
The Bolund experiment is a measuring campaign from a complex terrain performed in 2007 and 2008 where high frequency data from 35 anemometers provides a unique database designed to validate micro-scale flow models. Since no systematic comparison of micro-scale models existed it was decided to challenge micro-scale modelers to simulate the wind over Bolund and compare the results systematically. Since the Bolund measurements had not been published the comparison could be made blindly, i.e. the participants would not have prior knowledge of the measurement results. To broaden the types of models participating, modelers were invited worldwide from research institutes, universities and industry. More than 40 groups participated in the blind comparison with well over 50 model predictions and the blind comparison therefore gives an overview of the accuracy of micro-scale models anno 2010.
On the 3-4 December 2009, 80 specialists in modeling of wind over complex terrain meet at a Risø DTU workshop where the model predictions and the Bolund measurements were revealed. During the workshop, interesting presentations were given about different flow modeling approaches. This report contains copies of the presentations given at the workshop.