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ECN publication
An engineering model for yawed conditions, developed on the basis of wind tunnel measurements
Published by: Publication date:
ECN 1-10-1998
ECN report number: Document type:
ECN-RX--98-057 Article (scientific)
Number of pages:

Published in: Paper will be presented at the AIAA ASME conference, January 1999, Reno, USA (), , , Vol., p.-.

The project on the title subject aimed at the development of an improvedengineering model for the prediction of the unbalance in the inflow of a wind turbine rotor at yawed conditions. The yaw model was derived from inflow measurements which are performed in the rotorplane of a 1.2 m diameter wind turbine, placed in the open jet wind tunnel of the Delft University of Technology (DUT) in Delft, Netherlands. The model has been validated with load measurements in yaw which were made on several model wind turbines placed in wind tunnels and on a full scale wind turbine. In many validation cases, the new yaw model resulted in a considerable improvement of the prediction of the loads at yawed conditions. 7 refs.

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