Results 91 to 100 of about 75,453 (130)

Numerical study on the hydrodynamic performance of a semi-passive oscillating hydrofoil

Ocean Engineering, 2021
Abstract The bio-inspired oscillating hydrofoils are capable of harvesting energy from tidal currents. In this study, the effects of mechanical (spring and damping coefficients) and kinematic (pitching amplitude and oscillation frequency) parameters on the performance of the semi-passive oscillating hydrofoil (NACA 0015) system were numerically ...
Penglei Ma, Guijie Liu, Yong Wang, Yubing Zhang, Yudong Xie   +4 more
exaly   +2 more sources

Experimental and Numerical Study for Hydrodynamic Characteristics of an Oscillating Hydrofoil

Journal of Hydrodynamics, 2008
The present article reports the experimental Particle Image Velocimetry (PIV) investigation and the corresponding numerical simulation results about the water flow over the oscillating hydrofoil and its unsteady dynamic characters. The experimental study focuses on the effect of mean angles of attack.
Zhen Liu, Beom-Soo Hyun
exaly   +2 more sources

Oscillating Hydrofoil Propulsion for Human-Powered Watercraft Applications [PDF]

, 2013
Unlike conventional propellers, flapping wings may generate large amplitude oscillating forces, which can make them difficult to incorporate into a craft design. This is particularly true for a single, vertically oscillating hydrofoil, as part of a surface water craft where the cyclic lift of the hydrofoil disrupts the craft stability.
Fernandez, Rajan
openaire   +3 more sources

Blockage effect and ground effect on oscillating hydrofoil

Ocean Engineering, 2023
Guanghua He, Hassan Ghassemi, Weijie Mo   +2 more
exaly   +2 more sources

Horizontally Oscillating Hydrofoil-River-Turbine with Variable Immersion Depth

, 2014
Motivated by the unused hydrokinetic potential of smaller European rivers and creeks we develop a horizontally oscillating hydrofoil turbine to exploit those resources. Based on the work of T. Kinsey and Prof. G. Dumas of the Laval University, Canada, on vertically oscillating hydrofoils we adapt and improve the technology to the resources especially ...
NORTA, David Peter Benjamin, SACHAU, Jürgen, Hans-Josef, Allelein   +2 more
core   +3 more sources

Unsteady attached cavitation on an oscillating hydrofoil

Journal of Fluid Mechanics, 1988
A series of visualizations of non-cavitating and cavitating unsteady flows around an oscillating hydrofoil has been carried out in order to investigate the effect of unsteadiness on attached cavitation. The major conclusion of the present experimental analysis is that the strong interaction that was previously pointed out in the case of steady ...
Franc, Jean-Pierre, Michel, Jean-Marie
openaire   +2 more sources

Effects of spanwise flexibility on the hydrodynamic performance of an oscillating hydrofoil

Ocean Engineering
Penglei Ma, Yongpeng Nie, Guijie Liu, Zhanbin Meng, Yang Yao   +4 more
exaly   +2 more sources

The Design of Oscillating Hydrofoil Current Generation Device

Applied Mechanics and Materials, 2015
The oscillating hydrofoil current generation device utilizes a typical movement type, which can transform energy effectively from current. The study shows that the geometrical profile of blades is the fundamental factor to the efficiency. In order to resolve the problem, this paper adapt the BEM(blade elements momentum) theory, which plays an important
Li Zhen Zhang, Wei Wei Li
openaire   +1 more source

Testing and Analysis of an Oscillating Hydrofoils Turbine Concept

ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C, 2010
A new concept of hydrokinetic turbine using oscillating hydrofoils to extract energy from water currents (tidal or gravitational) is presented, tested and analyzed in the present investigation. Due to its rectangular extraction plane, this technology is particularly well suited for river beds and shallow waters near the coasts. The present turbine is a
Thomas Kinsey, Guy Dumas
openaire   +1 more source

Cavitating Multiphase Flow over Oscillating Hydrofoils

44th AIAA Aerospace Sciences Meeting and Exhibit, 2006
*† ‡ Many maritime applications involve the use of dynamically moving hydrofoils. Numerical simulations using Reynolds averaged Navier-Stokes equations are carried out to analyze the effect of cavitation on the dynamic stall of an oscillating hydrofoil. It was found that the flow physics changes considerably with cavitation.
Kartikeya Mahalatkar, Jeff Litzler, Karman Ghia, Urmila Ghia   +3 more
openaire   +1 more source