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Swimming of a Flexible Hydrofoil near a Free Surface
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 1964AbstractThis 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
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A Study on Fluid-Structure Interaction Performance of a Flexible Hydrofoil
Volume 2: CFD and FSI, 2018To 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 +3 more
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Steady Performance of a Flexible Hydrofoil Near a Free Surface
Journal of Ship Research, 1990A 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
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Bending Flutter and Torsional Flutter of Flexible Hydrofoil Struts
1973A 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 transient characteristics of cloud cavitating flow over a flexible hydrofoil
International Journal of Multiphase Flow, 2018Abstract The objective of this paper is to investigate the two-phase flow structure of cloud cavitation over a flexible hydrofoil with particular emphasis on cavitating flow-induced vibration and the cavity shedding dynamics via combined experimental and numerical studies.
Qin Wu +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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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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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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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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