Results 71 to 80 of about 343 (174)

A Soft Robotic Morphing Wing for Unmanned Underwater Vehicles

Advanced Intelligent Systems, Volume 6, Issue 6, June 2024.
This study presents the design and hydrodynamic characterization of a soft wing for implementation on underwater gliders. Through hydraulic actuation, the soft wing deforms and adjusts its lift‐to‐drag ratio, which ranges from −70% to +10% with respect to a rigid wing.
Andrea Giordano, Liam Achenbach, Daniel Lenggenhager, Fabian Wiesemüller, Roger Vonbank, Claudio Mucignat, André Tristany Farinha, Pham Huy Nguyen, Robert Katzschmann, Sophie F Armanini, Ivan Lunati, Sukho Song, Mirko Kovač   +12 more
wiley   +1 more source

Fluid-structure coupling for a non-sinusoidal forced oscillating hydrofoil based on an immersed boundary method

, 2017
Fluid-structure investigations in hydraulic machines using coupled simulations based on dynamical re-mesh are particularly time-consuming. This paper presents an implementation of an immersed boundary (IB) method for dynamical boundary flowing problem in
Wang, W, Tian, F ; https://orcid.org/, Yan, Y   +2 more
core   +1 more source

Creation of a Fish-Friendly Aquatic Hydropower Device Using an Oscillating Hydrofoil

, 2021
The harnessing of hydropower for use as a clean, marine life compatible energy source has been a struggle with conventional hydropower devices. The goal of our project was to design, develop, and test an alternative system to conventional hydro dams and ...
Niedzwiecki, Victoria, Hughes, Garrett B., Smith, Patricia S., Chernjavsky, Patrick   +3 more
core  

2D Oscillating Hydrofoil [PDF]

This paper presents a validation of numerical simulations in case of a forced oscillating hydrofoil. As a representative case study for vibrating blade in hydraulics machines, a 2D NACA 0009 oscillating hydrofoil is considered. Pressure coefficients from
Avellan, Francois, Münch, Cecile, Farhat, Mohamed, Ausoni, Philippe   +3 more
core  

Observations of Cavitation on a Three-Dimensional Oscillating Hydrofoil [PDF]

, 1990
A test apparatus was designed and constructed to observe the effect of sinusoidal pitching oscillations on the cavitation of three-dimensional hydrofoils.
Brennen, C. E., Acosta, A. J., Hart, D. P.   +2 more
core  

Research on the Influence of Hydrofoil Propulsive Parameters on Propulsion Efficiency

Journal of Marine Science and Engineering
Oscillating hydrofoils can be used to simplify the study of the swinging caudal fin propulsive mode of fish, where the motion parameters have a direct impact on the hydrodynamic performance and propulsive efficiency. In this study, numerical calculations
Meng Cui, Zhihao Liu, Fei Lu, Jiaye Gong, Zheng Fu   +4 more
doaj   +1 more source

Influence of wing kinematics on aerodynamic performance in hovering insect flight

, 2007
The influence of different wing kinematic models on the aerodynamic performance of a hovering insect is investigated by means of two-dimensional time-dependent Navier–Stokes simulations.
Bijl, H., Oudheusden, B.W., van, Van Oudheusden, B.W., Bos, F.M. (author), Lentink, D. (author), Van Oudheusden, B.W. (author), Bijl, H. (author), Bos, F.M., Lentink, D.   +8 more
core   +1 more source

Concept of Energy Extraction from Sea Waves Using Flapping Foils Operating as Biomimetic System

International Journal of Coastal and Offshore Engineering, 2016
Oscillating hydrofoils in presence of waves under the free surface as new systems for energy extraction is a hybrid renewable marine energy sources.
Ali Zinati, Mohammad Javad Ketabdari
doaj  

Numerical investigations of fluid structure coupling: oscillating hydrofoil [PDF]

This paper presents an investigation of the hydro elastic behavior of vibrating blades in hydraulic machines, which is of strong interest for turbo machinery applications.
Kueny, Jean-Louis, Avellan, Francois, Braun, Olivier, Münch, Cecile   +3 more
core  

Analytic Study on the Thrust of Two-Dimensional Foil with Aileron in Wave Field

한국해양공학회지
Numerous devices to reduce ship resistance have been suggested. One of them, a propagating hydrofoil in a wave field, can produce thrust and might be used to reduce the resistance of ships.
Kyeonguk Heo, Yoon-Rak Choi
doaj   +1 more source