Results 11 to 20 of about 3,877 (226)
Numerical prediction of hydrodynamic performance of differently shaped flapping foil propulsors
Zhongguo Jianchuan Yanjiu, 2021 ObjectivesThe hydrodynamic performance of three-dimensional hydrofoils with different shapes is studied in order to find the optimal hydrofoil geometry.Methods NACA 0012 hydrofoil model with different aspect ratios, tip ratios, forward-swept and back ...
Shenghao ZHANG, Lei MEI, Junwei ZHOU
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Performance of a hydrofoil operating close to a free surface over a range of angles of attack
International Journal of Naval Architecture and Ocean Engineering, 2021 Performance of a NACA 634-021 hydrofoil in motion under and in close proximity of a free surface for a large range of angles of attack is studied.
Zao Ni, Manhar Dhanak, Tsung-chow Su
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A Study on the Performance Variation of a Three-Dimensional Hydrofoil Using Jet Flow
한국해양공학회지, 2021 As one of the development directions of high-performance ships to reduce greenhouse gas emissions, there is research on high-performance propellers. However, in the case of conventional screw propellers, as they have been studied for a long time, there ...
Myeong-Jin Eom +4 more
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On the singing of hydrofoils [PDF]
The Journal of the Acoustical Society of America, 1976 Flexural vibrations of hydrofoils can be caused by the formation of vortices at their trailing edges. These vortices are formed at a predominant frequency which depends on the water velocity and a characteristic transverse wake dimension. When the shedding frequency corresponds to a flexural resonance frequency of the hydrofoil the severe vibrations ...
W. K. Blake, L. J. Maga, G. Finkelstein
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Propulsion performance analysis of hydrofoil on a wave-powered boat
Zhongguo Jianchuan Yanjiu, 2020 Objectives This study is focused on the influence of the hydrodynamic performance of hydrofoils on the propulsion of wave-powered boats. The hydrofoil rotation around the center of the wave-powered boat and the passive rotation around the center of the ...
DENG Chao +3 more
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Hydrofoils and Hydrofoil Craft [PDF]
Annual Review of Fluid Mechanics, 1973 At the present time several hundred hydrofoilcraft are in service throughout the world. The upsurge in the use of these craft did not really begin until the late 1950s, although fascination with the idea of supporting small boats with underwater wings dates well back into the nineteenth century.
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Effect of the laminar separation bubble induced transition on the hydrodynamic performance of a hydrofoil [PDF]
, 2014 The authors thank the technical staff of IRENav for their contribution to the experimental set up.The present study deals with the effect of the laminar separation bubble (LSB) induced transition on the lift, drag and moment coefficients of a hydrofoil ...
DELAFIN, Pierre Luc +4 more
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Numerical Simulation on Vortex Shedding from a Hydrofoil in Steady Flow
Journal of Marine Science and Engineering, 2020 This paper presents a numerical modeling procedure for the idealization of vortex shedding effects in the wake flow field of a NACA0009 hydrofoil. During the simulation, the lift and drag acting on the hydrofoil were monitored, and the vortex-shedding ...
Jian Hu +5 more
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An experimental study of boundary-layer transition induced vibrations on a hydrofoil [PDF]
, 2010 This paper aims at characterizing experimentally laminar to turbulent transition induced vibrations. Here, the transition is known to be triggered by a Laminar Separation Bubble that results from a laminar separation of the boundary-layer flow on a ...
Jacques Andre´ Astolfi +6 more
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An experimental analysis of fluid structure interaction on a flexible hydrofoil in various flow regimes including cavitating flow [PDF]
, 2012 The authors gratefully acknowledge the technical staff of IRENav for its contribution to the experimental set up.The structural response of a rectangular cantilevered flexible hydrofoil submitted to various flow regimes is analyzed through an original ...
SIGRIST, Jean-François +2 more
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