Print Email Facebook Twitter Towards spatially constrained gust models Title Towards spatially constrained gust models Author Bos, R. Bierbooms, W. Van Bussel, G. Faculty Aerospace Engineering Department Aerodynamics, Wind Energy & Propulsion Date 2014-03-31 Abstract With the trend of moving towards 10-20MW turbines, rotor diameters are growing beyond the size of the largest turbulent structures in the atmospheric boundary layer. As a consequence, the fully uniform transients that are commonly used to predict extreme gust loads are losing their connection to reality and may lead to gross over dimensioning. More suiting would be to represent gusts by advecting air parcels and posing certain physical constraints on size and position. However, this would introduce several new degrees of freedom that significantly increase the computational burden of extreme load prediction. In an attempt to elaborate on the costs and benefits of such an approach, load calculations were done on the DTU 10 MW reference turbine where a single uniform gust shape was given various spatial dimensions with the transverse wavelength ranging up to twice the rotor diameter (357 m). The resulting loads displayed a very high spread, but remained well under the level of a uniform gust. Moving towards spatially constrained gust models would therefore yield far less conservative, though more realistic predictions at the cost of higher computation time. To reference this document use: http://resolver.tudelft.nl/uuid:a30c4645-bb4e-4054-83e3-4675d5667305 DOI https://doi.org/10.1088/1742-6596/524/1/012107 Publisher IOP Publishing ISSN 1742-6596 Source Journal of Physics, conference series 1, 524, 2014 Part of collection Institutional Repository Document type journal article Rights (c)2014 The AuthorsPublished under licence by IOP Publishing Ltd Files PDF Bos.pdf 1.41 MB Close viewer /islandora/object/uuid:a30c4645-bb4e-4054-83e3-4675d5667305/datastream/OBJ/view