Results 31 to 40 of about 1,459 (188)
Instabilities in tidal turbine wakes [PDF]
Proceedings of the European Wave and Tidal Energy Conference, 2023 We report on the observation of vortex instabilities in the wake of a tidal turbine undergoing harmonic unsteady axial inflow (e.g. due to surface waves). The work was carried out using unsteady RANS (URANS) modelling using the open-source CFD software OpenFOAM, using the `pimpleDyMFoam' solver.
Smyth, ASM, Nishino, T, Young, AM
openaire +1 more source
Study on Impact of Turbine Location on Hydrodynamics in Tidal Farm
Discrete Dynamics in Nature and Society, 2019 This work aims at investigating the impact of different tidal turbine locations on hydrodynamics in near-field and far-field flow; thus, three- and two-dimensional (3- & 2-D) models were exploited in combination and applied in a case study of Putuo-Hulu ...
Hongqiang Zhang +6 more
doaj +1 more source
Analysis of the kinetic energy recovery behind a tidal stream turbine for various submergence levels
International Marine Energy Journal, 2022 Tidal turbines are commonly deployed at sea sites with water depths of up to 50 m to ease their deployment and quick maintenance operations. In these relatively shallow water depth conditions, the vertical expansion of tidal stream turbine wakes is ...
Pablo Ouro +2 more
doaj +1 more source
Wake of a Ducted Vertical Axis Tidal Turbine in Turbulent Flows, LBM Actuator-Line Approach
Energies, 2019 Vertical axis tidal turbines are devices that extract the kinetic energy from tidal currents. Tidal currents can be highly turbulent. Since ambient turbulence affects the turbine hydrodynamic, it is critical to understand its influence in order to ...
Mikaël Grondeau +3 more
doaj +1 more source
Hydrodynamic Analysis of Tidal Current Turbine under Water-Sediment Conditions
Journal of Marine Science and Engineering, 2022 The rivers connecting oceans generally carry sediment due to water and soil losses in China. Additionally, the maximum sediment concentration is 300 g/L, which is much higher than that of other countries.
Yanjing Gao +4 more
doaj +1 more source
Assessment of pulsating torque mitigation control strategy through tidal turbine emulation
The Journal of Engineering, 2019 This article presents the modelling and assessment of a pulsating torque mitigation control strategy by using a tidal turbine emulator in a laboratory environment.
Marios Charilaos Sousounis +2 more
doaj +1 more source
Tidal Energy: The benthic effects of an operational tidal stream turbine
Marine Environmental Research, 2017 The effect of modified flow on epifaunal boulder reef communities adjacent to the SeaGen, the world's first grid-compliant tidal stream turbine, were assessed. The wake of the SeaGen was modelled and the outputs were used in conjunction with positional and substrate descriptor variables, to relate variation in epifaunal community structure to the ...
J.P.J. O'Carroll +3 more
openaire +5 more sources
New Concept for Assessment of Tidal Current Energy in Jiangsu Coast, China
Advances in Mechanical Engineering, 2013 Tidal current energy has attracted more and more attentions of coastal engineers in recent years, mainly due to its advantages of low environmental impact, long-term predictability, and large energy potential.
Ji-Sheng Zhang +4 more
doaj +1 more source
An optimal tuning strategy for tidal turbines [PDF]
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2016 Tuning wind and tidal turbines is critical to maximizing their power output. Adopting a wind turbine tuning strategy of maximizing the output at any given time is shown to be an extremely poor strategy for large arrays of tidal turbines in channels. This ‘impatient-tuning strategy’ results in far lower power output, much higher structural loads and ...
openaire +2 more sources
Numerical simulations of biofouling effects on the tidal turbine hydrodynamic
International Marine Energy Journal, 2018 Biofouling by benthic organisms must be considered for tidal turbine operation and maintenance because it modifies hydrodynamics (drag and resistance) and could be detrimental to the turbine performance.
A. Rivier +3 more
doaj +1 more source