Numerical investigations of the transient cavitating vortical flow structures over a flexible NACA66 hydrofoil
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Hydrodynamics"
DOI: 10.1007/s42241-020-0060-y
Abstract: In this paper, the cavitating flow over a flexible NACA66 hydrofoil is studied numerically by a modified fluid-structure interaction strategy with particular emphasis on understanding the flow-induced vibration and the cavitating vortical flow structures. The… read more here.
Keywords: naca66 hydrofoil; cavitating vortical; cavity; flexible naca66 ... See more keywords
Hydrodynamic performance improvement on small horizontal axis current turbine blade using different tube slots configurations
Sign Up to like & getrecommendations! Published in 2019 at "Applied Ocean Research"
DOI: 10.1016/j.apor.2019.101873
Abstract: Abstract Vortex generators are used extensively as a passive flow control devices to delay or remove the boundary layer separation, which affects the hydrodynamic performance of the hydrofoil. In this paper, a new approach is… read more here.
Keywords: tube slots; performance; boundary layer; hydrodynamic performance ... See more keywords
Vortex dynamics and Reynolds number effects of an oscillating hydrofoil in energy harvesting mode
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Fluids and Structures"
DOI: 10.1016/j.jfluidstructs.2020.102888
Abstract: The energy extraction potential from the sinusoidal heaving and pitching motion of an elliptical hydrofoil is explored through direct numerical simulations (DNS) at a Reynolds number of 1,000 and large eddy simulations (LES) at a… read more here.
Keywords: vortex dynamics; hydrofoil; energy harvesting; number ... See more keywords
An efficient computational framework for hydrofoil characterisation and tidal turbine design
Sign Up to like & getrecommendations! Published in 2019 at "Ocean Engineering"
DOI: 10.1016/j.oceaneng.2018.10.032
Abstract: Abstract Blade element momentum (BEM) modelling offers a computationally inexpensive means of analysing turbine performance. Lift and drag coefficient data-sets specific to the operating conditions of the turbine must be input into a BEM model.… read more here.
Keywords: lift drag; turbine; vertical axis; hydrofoil ... See more keywords
The simulation of deformation and vibration characteristics of a flexible hydrofoil based on static and transient FSI
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DOI: 10.1016/j.oceaneng.2019.04.028
Abstract: Abstract Flexible hydrofoils can be regarded as the simplified lifting bodies of composite propellers, and these hydrofoils are suitable for use in the study of the fluid-structure interaction (FSI) computational method. The hydrodynamic simulation of… read more here.
Keywords: fsi simulation; flexible hydrofoil; transient fsi; hydrofoil ... See more keywords
Performance of a slotted hydrofoil operating close to a free surface over a range of angles of attack
Sign Up to like & getrecommendations! Published in 2019 at "Ocean Engineering"
DOI: 10.1016/j.oceaneng.2019.106296
Abstract: Abstract In this paper, results of a study of a submerged hydrofoil with a custom-designed internal slot are provided. The performance characteristics of the slotted hydrofoil in the presence of the free surface are investigated… read more here.
Keywords: slotted hydrofoil; free surface; angles attack; hydrofoil ... See more keywords
Experimental studies of hysteresis behavior of partial cavitation around NACA0015 hydrofoil
Sign Up to like & getrecommendations! Published in 2020 at "Ocean Engineering"
DOI: 10.1016/j.oceaneng.2020.107482
Abstract: Abstract Partial cavitation is one of the main cavitation regimes occurring in hydrofoil sections. In this study, the effect of gradually increasing and decreasing the angle of attack (α) on partial cavitation of hydrofoils, has… read more here.
Keywords: partial cavity; cavitation; partial cavitation; experimental studies ... See more keywords
Multi-objective optimization of hydrofoil geometry used in horizontal axis tidal turbine blade designed for operation in tropical conditions of South East Asia
Sign Up to like & getrecommendations! Published in 2020 at "Renewable Energy"
DOI: 10.1016/j.renene.2019.05.111
Abstract: Abstract Improved hydrodynamic design of a Horizontal Axis Tidal Turbine (HATT) blade is key to increasing the efficiency and annual power production of the turbine. One of the crucial stages in hydrodynamic design is the… read more here.
Keywords: optimization; axis tidal; turbine; geometry ... See more keywords
Numerical study of the hydrofoil cavitation flow with thermodynamic effects
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DOI: 10.1016/j.renene.2021.01.073
Abstract: Abstract High-temperature water exhibits evident thermodynamic effects during cavitation, which influences the cavitation flow and generates complex flow characteristics. To reveal the mechanism of thermodynamic effects on the cavitation flow in high-temperature water, a flow… read more here.
Keywords: thermodynamic effects; cavitation flow; temperature; hydrofoil ... See more keywords
The wake structure of a propeller operating upstream of a hydrofoil
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2020.680
Abstract: Abstract Large eddy simulations are presented on the wake flow of a notional propeller (the INSEAN E1658), upstream of a NACA0020 hydrofoil of infinite spanwise extent, mimicking propeller–rudder interaction. Results show that the flow physics… read more here.
Keywords: suction; tip vortices; propeller; wake ... See more keywords
Numerical investigation on cavitation flow of hydrofoil and its flow noise with emphasis on turbulence models
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DOI: 10.1063/1.4989587
Abstract: In this study, cavitation flow of hydrofoils is numerically investigated to characterize the effects of turbulence models on cavitation-flow patterns and the corresponding radiated sound waves. The two distinct flow conditions are considered by varying… read more here.
Keywords: cavitation; turbulence models; hydrofoil; cavitation flow ... See more keywords