Results 21 to 30 of about 343 (174)
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
doaj +2 more sources
Experimental Parameters Influencing the Cavitation Noise of an Oscillating NACA0015 Hydrofoil [PDF]
Journal of Marine Science and Engineering, 2023 The strong increase in anthropogenic underwater noise has caused a growing intention to design quieter ships given that ship propellers are one of the dominating noise sources along the worldwide shipping routes.
Leonie S. Föhring +2 more
doaj +2 more sources
Optimal Design and Numerical Simulation on Fish-Like Flexible Hydrofoil Propeller
Polish Maritime Research, 2016 Hydrofoil is widely used in underwater vehicle for the excellent hydrodynamic characteristics. Currently, researches are mostly about the rigid hydrofoil while the flexible hydrofoil, like the caudal fin, has not been studied adequately.
Xue Gang +6 more
doaj +3 more sources
Undulatory Propulsion at Milliscale on Water Surface [PDF]
Advanced Science, Volume 11, Issue 19, May 22, 2024.The water‐surface propulsion of an undulatory swimmer stems from the complex interplay of various forces that are generated by the body's waveform and the waves at the water‐air interface. Adjusting the material and dimensions of the body, along with the excitation manner of the head, allows for tuning of the swimmer's waveform that is crucial for ...
Ziyu Ren +3 more
wiley +2 more sources
Journal of Marine Science and EngineeringThe hydrofoil plays a crucial role in tidal current energy (TCE) devices, such as horizontal-axis turbines (HATs), vertical-axis turbines (VATs), and oscillating hydrofoils.
Hengliang Qu, Xueyan Li, Xiaochen Dong
doaj +2 more sources
Journal of Marine Science and EngineeringTo investigate the influence of the chord length and frequency of an oscillating hydrofoil device on the discharge characteristics of floating particulate matter, in this study, we take raceway aquaculture as an example and systematically compare and ...
Ertian Hua +5 more
doaj +2 more sources
Computational Study of Oscillating Hydrofoil with Different Plunging/Pitching Frequency
Journal of Aero Aqua Bio-mechanisms, 2010 A numerical investigation of an oscillating hydrofoil with unequal plunging/pitching frequency is conducted by solving unsteady Navier-Stokes equations. Studies are performed for the impact of different frequency ratio on the wake structure and propulsion parameters over a wide range of plunging amplitude, pitching amplitude and oscillating reduced ...
Qing Xiao
exaly +3 more sources
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 +1 more source
Modelling of an oscillating hydrofoil, with a fluid-structure interaction approach
, 2020 As policies to fight greenhouse gas emissions are more and more demanding and as the global energy demand is constantly increasing, renewable energies are currently seen as an important contribution to the global energy mix. Among them, tidal energy has the advantage of a perfectly known and highly predictable intermittency. The present work is part of
Brousseau, Paul
openaire +2 more sources
Variable camber hydrofoils in oscillating hydrofoil propulsion - Development of a prototype and a efficiency test setup [PDF]
, 2017 Flapping Foil is an ongoing development project at NTNU Technology Transfer working on a new way of propulsion for boats. Their goal is to eliminate two of the biggest issues with boats today, the low efficiency of boat propellers and the high friction created when moving in the water surface.
Aasheim, Jørgen
core +3 more sources