Almoghayer, Mohammed A.

Woolf, David K.

English

Hydraulic Engineering Repository

Conference Paper, Published VersionAlmoghayer, Mohammed A.; Woolf, David K.Modelling tidal energy converters in TELEMAC-3DZur Verfügung gestellt in Kooperation mit/Provided in Cooperation with:TELEMAC-MASCARET Core GroupVerfügbar unter/Available at: https://hdl.handle.net/20.500.11970/107180Vorgeschlagene Zitierweise/Suggested citation:Almoghayer, Mohammed A.; Woolf, David K. (2019): Modelling tidal energy converters inTELEMAC-3D. In: XXVIth TELEMAC-MASCARET User Conference, 15th to 17th October2019, Toulouse.Standardnutzungsbedingungen/Terms of Use:Die Dokumente in HENRY stehen unter der Creative Commons Lizenz CC BY 4.0, sofern keine abweichendenNutzungsbedingungen getroffen wurden. Damit ist sowohl die kommerzielle Nutzung als auch das Teilen, dieWeiterbearbeitung und Speicherung erlaubt. Das Verwenden und das Bearbeiten stehen unter der Bedingung derNamensnennung. Im Einzelfall kann eine restriktivere Lizenz gelten; dann gelten abweichend von den obigenNutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte.Documents in HENRY are made available under the Creative Commons License CC BY 4.0, if no other license isapplicable. Under CC BY 4.0 commercial use and sharing, remixing, transforming, and building upon the materialof the work is permitted. In some cases a different, more restrictive license may apply; if applicable the terms ofthe restrictive license will be binding.Verwertungsrechte: Alle Rechte vorbehalten Modelling tidal energy converters in TELEMAC-3D  Mohammed A. Almoghayer* and David K. Woolf International Centre for Island Technology, Heriot-Watt University, UK     Abstract: Various numerical methods such as CFD, BEM and RANS models have been used to study the interaction between tidal turbines and the tidal flow, and to investigate the performance of the tidal turbines. However, most of these studies consider idealised cases that cannot easily be translated to unsteady and non-uniform flow through a real channel [1]. Coastal tidal models provide an efficient and comprehensive approach to simulate tidal stream arrays in more realistic conditions. On the other hand, most of the studies which adopt this approach rely on 2D depth-averaged simulations to assess the performance of different tidal array layouts. 2D models ignore the effects of the turbine’s vertical position in the water column and the close proximity to the seabed or the surface on the overall performance. Contrary to 2D models, 3D models can better represent the various technologies and provide a more robust tool to assess tidal array performance. Tidal turbines are represented in the TELEMAC-2D as a drag force (similar to increasing the seabed friction) using DRAGFO subroutine. The drag force is applied as a friction stress spread out over an area representing the turbine. This area is defined as the sum of the area of the nodes inside the turbine envelope [2]. Building on this approached, we developed a code to capture the effects of the drag force, which is exerted by the turbines on the flow, and apply it as a head loss in TELEMAC-3D. This stress is treated as a source term in the shallow water equations. This paper describes the modelling approach of tidal turbines in TELEMAC-3D using SOURCE subroutine. Implementation of this approach will be assessed against a real measurements downstream Alstom DG4 tidal turbine, which was deployed in Fall of Warness, Orkney as part of ReDAPT project.  Proposed session: Waves, tidal renewable and hydro power energy assessment Key words: TELEMAC-3D, Tidal turbines, Tidal energy assessment Speaker: Mohammed A. Almoghayer    References: [1] I. Masters, R. Malki, A. J. Williams, and T. N. Croft, “The influence of flow acceleration on tidal stream turbine wake dynamics: A numerical study using a coupled BEM–CFD model,” Appl. Math. Model., vol. 37, no. 16–17, pp. 7905–7918, Sep. 2013. [2] A. Joly, C.-T. Pham, M. Andreewsky, S. Saviot, and L. Fillot, “Using the DRAGFO subroutine to model Tidal Energy Converters in Telemac-2D,” in XXII TELEMAC-MASCARET User Conference, 2015, pp. 182–189.                                                           * Corresponding author.  Email address: ma211@hw.ac.uk 

Modelling tidal energy converters in TELEMAC-3D

http://henry.baw.de/bitstream/20.500.11970/107180/1/33_Almogheyer_2019_Abstract.pdf

Modelling tidal energy converters in TELEMAC-3D

Abstract

Similar works

Full text

Available Versions

Hydraulic Engineering Repository