Thickness effect of NACA foils on hydrodynamic global parameters,boundary layer states and stall establishment |
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| Authors: | C Sarraf H Djeridi S Prothin JY Billard |
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| Institution: | 1. Institut de Recherche de l’Ecole Navale (IRENav, EA 3634), Ecole Navale BP 600, Lanvéoc Poulmic, 29240 Brest Armées, France;2. Université Européenne de Bretagne, Université de Brest, Laboratoire de Physique des Océans, UMR 6523, 6 Avenue Le Gorgeu, BP 809, 29285 Brest Cedex, France;1. Department of Mathematics, Islamic Azad University, Karaj Branch, Karaj, Iran;2. Department of Mathematics, Imam Khomeini International University, Qazvin 34149-16818, Iran;1. Université Grenoble 1/CNRS, UMR5588 LIPhy, Grenoble F-38041, France;2. Laboratory of Theoretical Spectroscopy, V.E. Zuev Institute of Atmospheric Optics, SB, Russian Academy of Science, 1, Akademician Zuev square, 634021 Tomsk, Russia;1. LEGI—Grenoble INP, BP 53, 38041 Grenoble Cedex 9, France;2. G2ELAB, University of Grenoble, BP 166, 38042 Grenoble Cedex 9, France;3. EDF R&D, 78401 Chatou, France;1. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. Temasek Laboratories, National University of Singapore, Engineering Drive 1, Singapore 117411, Singapore;1. Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh;2. Yokohama National University, Yokohama 240-8501, Japan;3. Aalto University, 02150 Espoo, Finland |
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| Abstract: | The present study experimentally investigates the hydrodynamic behaviour of 2-D NACA (15%, 25% and 35%) symmetric hydrofoils at Reynolds number 0.5×106. Particular attention was paid to the hysteretic behaviour at the static stall angle, and a detailed cartography of the boundary layer structures (integral quantities and velocity profiles) is given to support the detachment mechanism and the onset of von Kármán instability for thick hydrofoils. |
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