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Comparison of actuator disc and Joukowsky rotor flows, to explore the need for a tip correction
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2015 (English)In: Wake Conference 2015, 2015, 012013- p., 012013Conference paper, Published paper (Refereed)
Abstract [en]

In van Kuik & Lignarolo (2015, Wind Energy accepted with modifications) potential flow solutions have been obtained for classical actuator discs (axisymmetric, uniform load) presenting a model for the non-uniformity of the axial velocity at the disc. Current rotor design models proceed from a disc with a uniform axial velocity, modified by a tip correction like the one of Prandtl-Glauert-Shen. A comparison shows that this correction leads to a similar distribution as obtained from the potential flow solutions. A next comparison is made with the velocity distribution at the blade position of a Joukowsky rotor with constant bound circulation, calculated by an Actuator Line and a Lifting Line model. The resulting distributions correspond reasonably well to the potential flow disc distribution, in magnitude as well as shape. This implies that this non-uniform distribution is relevant for a rotor with a finite number of blades, and could be the basis for rotor design instead of the uniform but tip-corrected distribution.

Place, publisher, year, edition, pages
2015. 012013- p., 012013
Series
Journal of Physics Conference Series, ISSN 1742-6588 ; 625
National Category
Geosciences, Multidisciplinary
Identifiers
URN: urn:nbn:se:uu:diva-261146DOI: 10.1088/1742-6596/625/1/012013ISI: 000358047700013OAI: oai:DiVA.org:uu-261146DiVA: diva2:849816
Conference
Wake Conference, JUN 09-11, 2015, Visby, SWEDEN
Funder
StandUp for Wind
Available from: 2015-08-31 Created: 2015-08-31 Last updated: 2017-02-03Bibliographically approved

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Sarmast, SasanIvanell, Stefan

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