Results 101 to 110 of about 172 (142)
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Experimental study of the steady fluid–structure interaction of flexible hydrofoils
Journal of Fluids and Structures, 2014Abstract This paper presents results from an experimental study of the hydrodynamic and hydroelastic performance of six different flexible hydrofoils of similar geometry; four metal hydrofoils of stainless steel (SS) and aluminum (AL), and two composite hydrofoils of carbon-fiber reinforced plastic (CFRP). The two CFRP hydrofoils had differing layups,
Gustavo A. Zarruk +3 more
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The effect of twist on flexible hydrofoils
2010Flexible low aspect ratio hydrofoils were tested to investigate the effect of twist on the lift and drag characteristics and in particular, the high induced drag force. Flexible models with stiffeners at various positions and rigid models with a set twist were tested in a water flume and the lift and drag forces were measured over a range of angles of ...
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Numerical and experimental investigation of natural flow-induced vibrations of flexible hydrofoils
Physics of Fluids, 2016The objective of this work is to present combined numerical and experimental studies of natural flow-induced vibrations of flexible hydrofoils. The focus is on identifying the dependence of the foil’s vibration frequencies and damping characteristics on the inflow velocity, angle of attack, and solid-to-fluid added mass ratio.
Eun Jung Chae +4 more
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Flow-Induced Vibration of Flexible Hydrofoil in Cavitating Turbulent Flow
Volume 6: Polar and Arctic Sciences and Technology; CFD, FSI, and AIAbstract The flow-induced vibration and cavitation dynamics of three-dimensional flow past a cantilever flexible hydrofoil are investigated using a large eddy simulation (LES) model, a homogeneous mixture cavitation model and the structural modes superposition method. The present work aims to explore a potential mechanism responsible for
Zhi Cheng, Rajeev Jaiman
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Fluid-structure interaction simulation of three-dimensional flexible hydrofoil in water tunnel
Applied Mathematics and Mechanics, 2015The closely coupled approach combined with the finite volume method (FVM) solver and the finite element method (FEM) solver is used to investigate the fluid-structure interaction (FSI) of a three-dimensional cantilevered hydrofoil in the water tunnel.
Shiliang Hu, Chuanjing Lu, Yousheng He
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On the propulsion efficiency of swimming flexible hydrofoils of finite thickness
Journal of Fluid Mechanics, 1968This paper presents some recent theoretical results on the energy exchange between a swimming flexible two-dimensional hydrofoil of finite profile thickness and the inviscid incompressible fluid in which the body swims. The rate at which kinetic energy is transferred to the fluid by the undulating hydrofoil, the power required to maintain the ...
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Parametric excitations and lock-in of flexible hydrofoils in two-phase flows
Journal of Fluids and Structures, 2015Abstract This work introduces a reduced-order method to study the parametric excitations and lock-in of flexible hydrofoils caused by unsteady two-phase (cavitating) flow. The reduced-order method is based on a 1-DOF structural model coupled with a van der Pol wake oscillator with empirically derived relations for the variation in lift, cavity-length,
Deniz Tolga Akcabay, Yin Lu Young
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PREDICTING THE WETTED VIBRATION BEHAVIOR OF FLEXIBLE COMPOSITE HYDROFOILS
2019The objective of this work is to develop a numerical modelling approach that can predict the wetted vibration behavior of flexible composite hydrofoils.
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Journal of Ship Research, 1963
Measured span wise distributions of steady state and oscillatory lift and moment on fully submerged cantilever hydrofoils are presented. The hydrofoils were of aspect ratio 5 rectangular platform, and were towed at speeds sufficiently low to avoid cavitation. The data are compared with theoretical predictions and wind-tunnel data previously obtained at
Guido E. Ransleben, H. Norman Abramson
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Measured span wise distributions of steady state and oscillatory lift and moment on fully submerged cantilever hydrofoils are presented. The hydrofoils were of aspect ratio 5 rectangular platform, and were towed at speeds sufficiently low to avoid cavitation. The data are compared with theoretical predictions and wind-tunnel data previously obtained at
Guido E. Ransleben, H. Norman Abramson
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Effects of different paddling motion patterns and flexibility on hydrofoil propulsion performance
Ocean Engineering, 2023Linghui Peng +4 more
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