Comparison of actuator disc and Joukowsky rotor flows, to explore the need for a tip correction
2015 (English)In: Wake Conference 2015, 2015, 012013- p., 012013Conference paper (Refereed)
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
, Journal of Physics Conference Series, ISSN 1742-6588 ; 625
IdentifiersURN: urn:nbn:se:uu:diva-261146DOI: 10.1088/1742-6596/625/1/012013ISI: 000358047700013OAI: oai:DiVA.org:uu-261146DiVA: diva2:849816
Wake Conference, JUN 09-11, 2015, Visby, SWEDEN