ECN publication
First results from Mexnext: Analysis of detailed aerodynamic measurements on a 4.5 diameter rotor placed in the large German Dutch Wind Tunnel DNW
Schepers, J.G.; Pascal, L.; Snel, H.
Published by: Publication date:
ECN Wind Energy 19-7-2010
ECN report number: Document type:
ECN-M--10-045 Conference Paper
Number of pages: Full text:
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Presented at: European Wind Energy Conference and Exhibition (EWEC), Warsaw, Poland, 20-23 april 2010.

This paper presents an analysis of measurements which have been taken in the EU project Mexico (Model Rotor Experiments In Controlled Conditions). In the Mexico project a large number of European research institutes and universities cooperated. The project resulted in a database of measurements on a 3 bladed 4.5 m diameter wind turbine model placed in the LLF tunnel (with a 9.5 by 9.5 m2 open test section) of DNW in the Netherlands. Pressure and load measurements on the blade have been carried out simultaneously with stereo PIV flow field measurements. An extensive analysis of the Mexico measurements takes place within IEA Task 29 Mexnext. The paper presents recent results from ECN obtained within the framework of this IEA Task where special attention is paid to the correlation between pressure measurements and the overall wind turbine loads, the influence of the rotational speed on the aerodynamics, the correlation between pressure measurements and the tip vortices in the wake, the non-uniformity of the flow within the rotor plane and the tip vortex trajectories at yawed conditions

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