Results 1 to 10 of about 1,159 (176)
Various Wavy Leading-Edge Protuberance on Oscillating Hydrofoil Power Performance [PDF]
Journal of Applied Fluid Mechanics, 2023 This paper is presented to compare various wavy leading-edge protuberances on oscillating hydrofoil performance and power efficiency. The unsteady turbulent 3D flow simulations were carried out by using the StarCCM+ software.
A. Abbasi +3 more
doaj +2 more sources
Developments and Challenges of Miniature Piezoelectric Robots: A Review. [PDF]
Adv Sci (Weinh), 2023 Miniature piezoelectric robots (MPRs) have exhibited many highlight features and captured considerable attentions and favor of numerous scholars. A comprehensive review of recent development in MPRs is provided, including the operating environment, the structure of piezoelectric actuating element, working principle, attempts of new fabricated methods ...
Li J +5 more
europepmc +2 more sources
Comparing Models of Lateral Station-Keeping for Pitching Hydrofoils [PDF]
Biomimetics, 2019 Fish must maneuver laterally to maintain their position in schools or near solid boundaries. Unsteady hydrodynamic models, such as the Theodorsen and Garrick models, predict forces on tethered oscillating hydrofoils aligned with the incoming flow.
Peter Gunnarson +2 more
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Computational Investigation of Multiple Oscillating Hydrofoils and its Effect on Thrust Augmentation [PDF]
MATEC Web of Conferences, 2021 Previous investigations of flapping hydrofoils for the purpose of thrust production have been limited to one or two in tandem. Tandem foils were found to have superior performance because the performance of the aft foil was augmented by the vortices shed
Krige Uma, Lua Kim Boon, Ho Wei Hua
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Xibei Gongye Daxue Xuebao, 2023 In order to effectively utilize the tidal current energy in offshore wind farms, a swing oscillating hydrofoil system for tidal current energy capture is proposed.
ZHU Weijun +5 more
doaj +1 more source
A Simplified Mathematical Model of Pumped Hydrofoils
Journal of Marine Science and Engineering, 2023 This paper presents a simplified mathematical model of a pumped hydrofoil (PH)—a surfboard elevated above water surface and connected to a tandem of hydrofoils by a strut. The PH is operated by a rider who stands on the surfboard and produces swinging up-
Kirill Rozhdestvensky
doaj +1 more source
Tip Vortex Cavitation on an Oscillating Hydrofoil [PDF]
Journal of Fluids Engineering, 1997 This paper discusses tests conducted in the hydrodynamic tunnel of the University of Grenoble on a 3D oscillating hydrofoil. Visualization of unsteady tip vortex cavitation indicates a strong influence of the water nuclei content. The investigation was focused on the influence of the oscillation frequency on tip vortex cavitation inception.
Boulon, Olivier +2 more
openaire +2 more sources
Energies, 2021 Oscillating hydrofoils were installed in a water tunnel as a surrogate model for a hydrokinetic cross-flow tidal turbine, enabling the study of the effect of flexible blades on the performance of those devices with high ecological potential.
Stefan Hoerner +6 more
doaj +1 more source
Role of Shape and Kinematics in the Hydrodynamics of a Fish-like Oscillating Hydrofoil
Journal of Marine Science and Engineering, 2023 In the present two-dimensional numerical study, we investigate the roles of geometrical parameters of a hydrofoil (shape/curvature of the leading and trailing edges and thickness) and kinematic parameters (phase difference between heave and pitch (ϕ)) on
Siddharth Gupta +4 more
doaj +1 more source
The Canadian Journal of Chemical Engineering, Volume 101, Issue 10, Page 6003-6016, October 2023., 2023 Drawbacks in phase change models in simulating flashing of steam with a subsaturation downstream boundary condition. Abstract The development of phase change models applicable to a wide range of temperatures, pressures, and mass flow rates is primarily limited by the metastable or partially stable behaviour of the fluid. Due to this, the fluid does not
Stanley John, Carlos F. Lange
wiley +1 more source