Results 61 to 70 of about 1,802 (177)
Some Current Advances in Cavitation Research [PDF]
, 1997 Several recent experimental and analytical investigations of cavitating flows have revealed new phenomena which clearly affect how we should view cavitation growth and collapse and the strategies used to ameliorate its adverse effects. On the scale of
Brennen, Christopher E.
core
Wind Turbine Optimization by Blade Element Momentum Method and Particle Swarm Optimization Technique
Journal of Engineering, Volume 2025, Issue 1, 2025.The aerodynamic efficiency of wind turbines is greatly influenced by the shape of their airfoils. In this study, four airfoils were optimized to enhance the performance of a small horizontal axis wind turbine. The optimization process involved adjusting the thickness and camber of the airfoils using the blade element momentum method and particle swarm ...
Hossein Seifi Davari +4 more
wiley +1 more source
Energy Reports, 2022 The energy contained in the tidal motion of the seas and oceans has the potential to be a significant source ofrenewable energy. The oscillating hydrofoil current-energy turbine has a good performance to extract energyfrom the coupling of its heaving and pitching motions.
Weijie Mo +7 more
openaire +2 more sources
Energy Science &Engineering, Volume 12, Issue 10, Page 4394-4413, October 2024.This study develops a method of identifying vortices in the impeller channel of the multiphase pump, and reveals the intrinsic connection between the vortices and pressure fluctuations in the main flow passage. These findings offer some suggestions for eliminating the influence of vortices and enhancing the pressurizing capabilities of multiphase pumps.
Guangtai Shi +4 more
wiley +1 more source
On the Dynamics and Acoustics of Cloud Cavitation on an Oscillating Hydrofoil [PDF]
, 1994 Observations have been made of the growth and collapse of surface and cloud cavitation on a finite aspect ratio hydrofoil oscillating in pitch. The cavitation was recorded using both still and high-speed motion picture photography, and the variations ...
Brennen, Christopher E., McKenney, E. A.
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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 +12 more
wiley +1 more source
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, Wei Liao
openaire +2 more sources
Cloud Cavitation: The Good, The Bad and the Bubbly [PDF]
, 2008 In many cavitating liquid flows, when the number and concentration of the bubbles exceeds some critical level, the flow becomes unsteady and large clouds of cavitating bubbles are periodically formed and then collapse when convected into regions of ...
Brennen, Christopher E.
core
Bubbly cloud dynamics and cavitation [PDF]
, 2007 In many cavitating liquid flows, when the number and concentration of the bubbles exceeds some critical level, the flow becomes unsteady and large clouds of cavitating bubbles are periodically formed and then collapse when convected into regions of ...
Brennen, Christopher E.
core
Observations of Cavitating Flow [PDF]
, 1994 This paper will present a review of some of the recent advances in our understanding of the dynamics and acoustics of cavitating flows. We focus first on the individual events which evolve from a single travelling nucleus and describe observations of the
Brennen, Christopher E.
core