IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Special sessions : A 3d nested model for assessing the impacts of tidal turbines
A 3d nested model for assessing the impacts of tidal turbines
Tidal current energy resources have the ability to provide a sizable proportion of our future energy requirements. However,
to date there have been relatively few deployments of commercial-scale tidal turbines and, as a result, field data relating to
hydro-environmental impacts is severely lacking. It is therefore necessary, to utilise numerical models to determine the
likely impacts of deployments of turbine arrays on the surrounding environment. For the purposes of this research, an
existing three-dimensional (3D) model was modified to incorporate the mechanics of energy extraction by tidal turbines.
The tidal turbines are modelled as porous discs and energy extraction is simulated by incorporating the turbine thrust as a
retarding force. To show how the developments to the model have improved its ability to simulate the characteristics of a
turbine¡¯s wake it was compared to a two-dimensional (2D) nested model, a single grid 3D model, a single grid 2D model
and to published experimental results. It is shown that the model is capable of simulating the far-field effects of turbine
energy extraction. It is also shown that the nested 2D and 3D models produced results with higher values of correlation to
experimental results than the corresponding single grid model results. The 3D nested model is able to simulate the effects
of energy extraction on the velocity depth profile. These effects can only be observed using a 3D model, thereby
demonstrating the benefits of utilising 3D over 2D models.
File Size : 593,363 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Special sessions
Date Published : 17/08/2015
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