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Title: Validating BEM, direct and inverse free wake models with the MEXICO experiment
Authors: Micallef, Daniel
Kloosterman, Menno
Simao Ferreira, Carlos
Sant, Tonio
van Bussel, Gerard
Keywords: Wind turbines
Particle image velocimetry
Issue Date: 2010
Publisher: American Institute of Aeronautics and Astronautics, Inc.
Citation: Micallef, D., Kloosterman, M., Ferreira, C., Sant, T., & van Bussel, G. (2010). Validating BEM, direct and inverse free wake models with the MEXICO experiment. 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Orlando. 1-10.
Abstract: The primary objective of the MEXICO (Model Experiments in Controlled Conditions) project was to generate experimental data for validation of models for wind turbines. Kulite c pressure sensors were used for pressure measurements while Particle Image Ve- locimetry was used with the aim of tracking the tip vortex trajectory. The pressure measurements were carried out for both axial and yawed flow conditions with yaw angles of 15o , 30o and 45o . For the Particle Image Velocimetry measurements data was gathered for axial flow and for the ±30o yaw cases at a single tip speed ratio. In this work, an inverse free wake lifting line model, a direct free wake model and a BEM model are validated with the MEXICO data. Particular emphasis is placed on the study of yawed flow conditions. The inverse free-wake model makes use of the experi- mental loads as input in order to find the distribution of inductions and angle of attack. The predictive capability of BEM may therefore be assessed based on this. Validation of the inverse free-wake model was performed by investigating the stagnation pressure prediction as well as the vortex trajectory prediction. This was done by means of the PIV data gathered from the MEXICO experiment. This PIV data was also used for validation purposes of the direct free-wake model. The differences in the angle of attack distributions in yawed flow with these models was studied in order to assess the difference in results between the use of 2D and 3D airfoil data.
ISBN: 9781600867392
Appears in Collections:Scholarly Works - FacBenED
Scholarly Works - FacEngME

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