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ECN publication
Noise aspects at aerodynamic blade optimisation projects
Published by: Publication date:
ECN 1997
ECN report number: Document type:
ECN-RX--97-015 Article (scientific)
Number of pages:

Published in: Paper, presented at the IEA expert meeting on aeroacoustics, March 17, 1997, Milano, Italy (), , , Vol., p.-.

The Netherlands Energy Research Foundation (ECN) has often been involvedin industrial projects, in which blade geometries are created automatic by means of numerical optimisation. Usually, these projects aim at the determination of the aerodynamic optimal wind turbine blade, i.e. the goal is to design a blade which is optimal with regard to energy yield. In other cases, blades have been designed which are optimal with regard to cost of generated energy. However, it is obvious that the wind turbine blade designs which result from these optimisations, are not necessarily optimal with regard to noise emission. In this paper an example is shown of an aerodynamic blade optimisation, using the ECN-program PVOPT. PVOPT calculates the optimal wind turbine blade geometry such that the maximum energy yield is obtained. Using the aerodynamic optimal blade design as a basis, the possibilities of noise reduction are investigated. 11 figs., 8 refs.

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