Ramos, Victor and Carballo, R. and Ringwood, John
(2019)
Application of the actuator disc theory of Delft3D-FLOW to model farfield hydrodynamic impacts of tidal turbines.
Renewable Energy, 139.
pp. 1320-1335.
ISSN 0960-1481
Abstract
Accurate knowledge of tidal turbine impacts on the far-field hydrodynamic conditions, which extend
from 3 to 20 diameters downstream the turbine, is essential for the estimation of tidal resource, farm
layout design and environmental impact. For this purpose, tidal turbine operation is modelled within
coastal models, as enhanced bottom friction, or momentum sinks. In Delft3D-FLOW, a state-of-the-art
coastal model, turbine operation is usually represented via momentum losses, using the Porous Plate
tool. However, the Porous Plate tool presents significant limitations to accurately represent energy
extraction and geometry of tidal turbines. Recently, a new tool (Actuator Disc) based on the Momentum
Actuator Disc Theory (MADT) was developed in Delft3D-FLOW, overcoming the aforementioned limitations and showing excellent results against laboratory data. The aim of this work is to compare the
behaviour of the Actuator Disc and Porous Plate on the far-field hydrodynamics. Overall, significant differences were found, with the Porous Plate significantly underestimating the impact on instantaneous
and residual flow velocities and turbulence conditions, when the turbine operates at its rated power.
Consequently, MADT appears as the best alternative to investigate the far-field hydrodynamic impacts of
tidal turbine operation and previous research based on the Porous Plate tool should be revisited.
Repository Staff Only(login required)
 |
Item control page |
Downloads per month over past year
Origin of downloads
Altmetric
Altmetric