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Comparison of potential flow-based and measured pressure distributions over upwind sails
Technical University of Munich, Germany; University of Auckland, New Zealand.
Technical University of Munich, Germany; University of Auckland, New Zealand.ORCID iD: 0000-0003-1035-709X
Technical University of Munich, Germany; University of Auckland, New Zealand.
Technical University of Munich, Germany; University of Auckland, New Zealand.
2010 (English)In: Journal of Aircraft, ISSN 0021-8669, E-ISSN 1533-3868, Vol. 47, no 6, p. 2174-2176Article in journal (Refereed) Published
Abstract [en]

The results of the comparative analysis of potential flow-based and measured pressure distributions over upwind sails were investigated. The sail models were supported by wires inside a frame, rather than being set on a yacht model that allowed trimming the models to several predefined positions very precisely and with good repeatability. The freestream dynamic pressure was q = 32.5 Pa, with a variation of ±1 Pa in the vicinity of the sails. The headsail and its image were considered to be one sail with a continuous deck-symmetrical circulation distribution. The vortex-lattice method (VLM) code uses mirror images of the sails to model the influence of the sea surface. The results indicated that the mast and hull, which are ignored in the theoretical analysis, lead to only a 3% reduction in lift of the headsail, but to a 7% reduction for the mainsail.

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics Inc. , 2010. Vol. 47, no 6, p. 2174-2176
Keywords [en]
Pressure distribution, Surface waters, Circulation distribution, Comparative analysis, Free-stream dynamic pressure, Mirror images, Pre-defined position, SAIL model, Sea surfaces, Vortex lattice method, Potential flow
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:ri:diva-71817DOI: 10.2514/1.C031140Scopus ID: 2-s2.0-79251503308OAI: oai:DiVA.org:ri-71817DiVA, id: diva2:1838072
Available from: 2024-02-15 Created: 2024-02-15 Last updated: 2024-02-15Bibliographically approved

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Gerhardt, Frederik

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