Results 131 to 140 of about 306 (161)

Steady Performance of a Flexible Hydrofoil Near a Free Surface

Journal of Ship Research, 1990
A linearized cavity-flow theory is used to develop a mathematical model to study the steady characteristics of a flexible hydrofoil near a free surface. The Galerkin method is employed to account for the mutual interaction between the fluid and structure forces.
Salwa M. Rashad, Theodore Green
openaire   +1 more source

Swimming of a Flexible Hydrofoil near a Free Surface

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 1964
AbstractThis paper represents some of the results obtained from a study which extended an exact linearized potential theory to include the problem of the thrust generated by an oscillating, flexible, flat, two‐dimensional plate of zero thickness moving near the free surface of an ideal incompressible fluid.
J. W. Reece, J. Siekmann
openaire   +1 more source

Experimental and numerical investigation of the fluid-structure interaction on a flexible composite hydrofoil under viscous flows

Ocean Engineering, 2019
International audienceThis research investigates the fluid-structure interaction and hydroelastic response of a composite hydrofoil using an innovative joint experimental and numerical method.
Antoine Ducoin, Hervé Le Sourne
exaly   +2 more sources

A Study on Fluid-Structure Interaction Performance of a Flexible Hydrofoil

Volume 2: CFD and FSI, 2018
To research the flexible hydrofoils’ hydroelastic response, the fluid-structure interaction (FSI) characteristic investigation is conducted on the basis of the analysis of a rigid hydrofoil’s hydrodynamic performance. For a rigid cantilevered rectangular hydrofoil, the pitching hydrodynamic performance is calculated using boundary motion with remeshing
Zheng Huang, Ying Xiong, Ye Xu, Shancheng Li   +3 more
openaire   +1 more source

Parametric excitations and lock-in of flexible hydrofoils in two-phase flows

Journal of Fluids and Structures, 2015
Abstract 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
openaire   +1 more source

Computational Fluid Dynamics Study of a Flexible Flapping Hydrofoil Propulsor

Volume 2: CFD and VIV, 2016
A CFD study to understand the hydrodynamics and fluid flow around a chordwise flexible hydrofoil with combined sway and yaw motion which imitates the caudal fin flapping in thunniforms, is presented. The dependency of motion parameters of the flexible flapping hydrofoil to its propulsive performance is studied by carrying out the analyses over a ...
Harikrishnan Vijayakumaran, Parameswaran Krishnankutty   +1 more
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On the propulsion efficiency of swimming flexible hydrofoils of finite thickness

Journal of Fluid Mechanics, 1968
This 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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Experimental study of the steady fluid–structure interaction of flexible hydrofoils

Journal of Fluids and Structures, 2014
Abstract 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, Paul A. Brandner, Bryce W. Pearce, Andrew W. Phillips   +3 more
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Bending Flutter and Torsional Flutter of Flexible Hydrofoil Struts

1973
A large body of experimental and theoretical flutter results for hydrofoil struts were analyzed to determine significant characteristics. Flutter was found to occur in two different structural mode shapes, corresponding to a predominantly bending mode and a predominantly torsional mode, respectively.
Yuan-Ning Liu, Peter K. Besch
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The effect of twist on flexible hydrofoils

2010
Flexible 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 ...
openaire   +1 more source