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dc.contributor.authorHaans, Wouter-
dc.contributor.authorSant, Tonio-
dc.contributor.authorvan Kuik, Gijs-
dc.contributor.authorvan Bussel, Gerard-
dc.identifier.citationHaans, W., Sant, T., van Kuik, G., & van Bussel, G. (2006). Stall in yawed flow conditions: a correlation of blade element momentum predictions with experiments. Journal of Solar Energy Engineering, 128(4), 472-480.en_GB
dc.description.abstractYawed flow conditions introduce unsteady loads in a wind turbine that affect generated power quality and fatigue life. An unsteady phenomenon of special concern is dynamic stall, due to the significant load fluctuations associated with it. Although the assumptions underlying BEM models are totally inadequate in yawed flow conditions, these models, modified with engineering models, are still widely used in industry. It is therefore relevant to assess the capabilities of BEM models in predicting the location of dynamic stall on the blade for a rotor in yawed flow conditions. A rotor model is placed in an open jet wind tunnel and tested in yawed flow conditions. The locations of dynamic stall on the blade of a rotor model as a function of the blade position are observed. Two experimental techniques are used; tufts glued to the blade and hot-film anemometry in the near wake. The results from the two techniques are compared and possible causes for differences are identified. Furthermore, the rotor model in yaw is modelled with a simple BEM model, utilizing a Gormont dynamic stall model. The regions of dynamic stall on the blades predicted by the BEM model are compared with the experimental results. The BEM model seems capable of a crude prediction of the dynamic stall locations found for the rotor model in yawed flow conditions.en_GB
dc.publisherThe American Institute of Aeronautics and Astronautics (AIAA)en_GB
dc.subjectWind turbinesen_GB
dc.subjectWind turbines -- Aerodynamicsen_GB
dc.titleStall in yawed flow conditions : a correlation of blade element momentum predictions with experimentsen_GB
dc.rights.holderThe copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder.en_GB
dc.bibliographicCitation.conferencename44th AIAA Aerospace Sciences Meeting 2006en_GB
dc.bibliographicCitation.conferenceplaceReno, United States, 9-12/01/2006en_GB
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