Experimental Investigation of Asymmetric Spinnaker Aerodynamics Using Pressure and Sail Shape Measurements

Autor: Julien Deparday, Peter Richards, D. J. Le Pelley, Richard G.J. Flay, D Motta, Patrick Bot
Přispěvatelé: University of Auckland [Auckland], Institut de Recherche de l'Ecole Navale (IRENAV), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), This project has received funding from the European Union's Seventh Programme for research, technological development and demonstration under grant agreement No PIRSES-GA-2012-318924, and from the Royal Society of New Zealand for the UK-France-NZ collaboration project SAILING FLUIDS.
Jazyk: angličtina
Rok vydání: 2014
Předmět:
[PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn]
Engineering
Leading edge
Environmental Engineering
Suction
Instrumentations et Détecteurs [Physique]
Ocean Engineering
Curvature
Sail shape
Course (navigation)
[SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
sail force
Trailing edge
14. Life underwater
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph]
Aerospace engineering
Wind tunnel
Yacht
business.industry
Asymmetric spinnaker
Aerodynamics
Mechanics
Pressure distribution
gennaker
Aerodynamic force
Dynamique des Fluides [Physique]
business
Mécanique: Mécanique des fluides [Sciences de l'ingénieur]
Zdroj: Ocean Engineering
Ocean Engineering, Elsevier, 2014, a paraitre. ⟨10.1016/j.oceaneng.2014.07.023⟩
ISSN: 0029-8018
DOI: 10.1016/j.oceaneng.2014.07.023⟩
Popis:  Combines on-water sail pressure and shape measurements to determine forces  International collaboration involving researchers in France and New Zealand  First published results of such measurements on asymmetric spinnakers  Accuracy of the shape predictions from the highly curved sails is shown to be good  Results give fine details of the pressure distributions along the height and chord  Full-scale results from measurements on both a Stewart 34 and a J80 An innovative method combining simultaneous on-water pressure and sail shape measurements for determining aerodynamic forces produced by sails is described and used on Stewart 34 and J80 Class yachts flying asymmetric spinnakers. Data were recorded in light and medium winds in order to check the reliability, accuracy and repeatability of the system. Results showed similar trends to the published literature. The accuracy of the system was investigated by wind tunnel tests, with determination of the entire sail shape from the stripe images recorded by the camera-based (VSPARS) system, and was found to be relatively good. Generally the pressure distributions show a leading edge suction peak, occurring at 5 to 10% of the chord length, followed by a pressure recovery and then a suction increase due to the sail curvature, with finally a reduction in suction near the trailing edge. The drive force coefficient measured on the Stewart 34 is lower than for the J80 because of a non-optimal sail shape due to light winds. On a reaching course, the standard deviation of the pressure signals was largest near the luff, reducing in the stream-wise direction, while it was high on the entire sail section when sailing on a running course. This project has received funding from the European Union’s Seventh Programme for research, technological development and demonstration under grant agreement No PIRSES-GA-2012-318924, and from the Royal Society of New Zealand for the UK-France-NZ collaboration project SAILING FLUIDS.
Databáze: OpenAIRE
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