Results 11 to 20 of about 75,453 (130)
Analysis of Geometric Parameter Characteristics of Oscillating Hydrofoils with Double Fowler Flaps
ActuatorsIn order to improve the energy extraction capability of oscillating hydrofoils, a dual-Fowler-flap structure is adopted as a device to increase lift.
Guang Sun +4 more
doaj +2 more sources
Negative lift generation in a tidal device structure [PDF]
, 2009 Becoming aware of the impact of global warming, all countries of the European Union have agreed to produce 20% of their electricity from renewable energy by 2020.
Thilleul, Olivia
core +7 more sources
EFFECTS OF TWO TYPES OF CONTROLLABLE DEFORMATION ON ENERGY EXTRACTION OF A FLEXIBLE HYDROFOIL
Brodogradnja, 2022 Energy extraction capacity of controllably flexible hydrofoil was studied under two identified deformation modes. Deformation modes, flexure parameters (flexure amplitude and flexure coefficient ) and motion parameters (reduced frequency f* and ...
Yubing Zhang +4 more
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
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
An experimental analysis of fluid structure interaction on a flexible hydrofoil in various flow regimes including cavitating flow [PDF]
, 2012 The authors gratefully acknowledge the technical staff of IRENav for its contribution to the experimental set up.The structural response of a rectangular cantilevered flexible hydrofoil submitted to various flow regimes is analyzed through an original ...
SIGRIST, Jean-François +2 more
core +1 more source
Developments and Challenges of Miniature Piezoelectric Robots: A Review
Advanced Science, Volume 10, Issue 36, December 27, 2023., 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 ...
Jing Li +5 more
wiley +1 more source
Cavity induced vibration of flexible hydrofoils [PDF]
, 2014 The objective of this work is to investigate the influence of cavity-induced vibrations on the dynamic response and stability of a NACA66 hydrofoil at 8° angle of attack at Re=750 000 via combined experimental measurements and numerical simulations.
CHAE, Eun Jung +4 more
core +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
Deep‐time invention and hydrodynamic convergences through amniote flipper evolution
The Anatomical Record, Volume 306, Issue 6, Page 1323-1355, June 2023., 2023 Abstract The diapsid plesiosaurs were pelagic and inhabited the oceans from the Triassic to the Cretaceous. A key evolutionary character of plesiosaurs is the four wing‐like flippers. While it is mostly accepted that plesiosaurs were underwater fliers like marine turtles, penguins, and maybe whales, other swimming styles have been suggested in the past.
Anna Krahl, Ingmar Werneburg
wiley +1 more source