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dc.contributor.authorMicallef, Daniel
dc.contributor.authorAkay, Busra
dc.contributor.authorSant, Tonio
dc.contributor.authorFerreira, Carlos Simao
dc.contributor.authorvan Bussel, Gerard
dc.date.accessioned2017-05-29T08:56:38Z
dc.date.available2017-05-29T08:56:38Z
dc.date.issued2012
dc.identifier.citationMicallef, D., Akay, B., Sant, T., Ferreira, C. S., & van Bussel, G. (2012). Body and wake influences on the 3D flow close to a HAWT rotor. EUROMECH Colloquium 528, Oldenburg. 1-14.en_GB
dc.identifier.urihttps://www.um.edu.mt/library/oar//handle/123456789/19469
dc.description.abstractThis work focuses on the hypothesis that flow three-dimensionality in the rotor proximity is strongly affected by blade blockage and bound circulation. The extent of flow three-dimensionality in the blade proximity needs to be assessed particularly in sensitive regions such as the root and tip of the blade. Moreover the induction needs to be decomposed into two components; that resulting due to the blade presence and that due to the wake. In this regard, the estimation of bound vorticity is essential such that its effects and those due to trailing vorticity can be understood. To investigate the hypothesis, an experimental and a numerical approach is used. A two bladed, 2m diameter rotor was tested in the Open Jet Facility at TU Delft measuring 6m×6.5m×13.5m using Stereo Particle Image Velocimetry (SPIV). The flow field around the tested HAWT blade was successfully measured and the velocity components around the entire blade were studied. The bound vorticity was measured using the experimental data and compared well with the numerical measurements. The radial flow, responsible for 3D effects was found to have high values not at the 100% span position but rather at around 90% span. The flow components were also decomposed using the potential flow model. Whilst the wake causes an increase in the flow three-dimensionality, the blade effect was found to be indeed the opposite and hence to decrease the inductions (and hence flow three-dimensionality). While momentum approaches utilize correction functions to account for the finite nature of the HAWT blade, we provide new understanding of the three-dimensional flow field which may prove useful for future work in refining momentum formulations.en_GB
dc.language.isoenen_GB
dc.publisherUniversity of Oldenburg. Institute of Physics & ForWinden_GB
dc.rightsinfo:eu-repo/semantics/openAccessen_GB
dc.subjectRotorsen_GB
dc.subjectWind turbinesen_GB
dc.titleBody and wake influences on the 3D flow close to a HAWT rotoren_GB
dc.typeconferenceObjecten_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.conferencenameEUROMECH Colloquium 528en_GB
dc.bibliographicCitation.conferenceplaceOldenburg, Germany, 22-24/02/2012en_GB
dc.description.reviewedpeer-revieweden_GB
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Scholarly Works - FacEngME

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