Next Article in Journal
A Survey of Marine Coastal Litters around Zhoushan Island, China and Their Impacts
Next Article in Special Issue
Investigating the Effect of Heterogeneous Hull Roughness on Ship Resistance Using CFD
Previous Article in Journal
Oil Spill Modeling: A Critical Review on Current Trends, Perspectives, and Challenges
Previous Article in Special Issue
Numerical Investigation on Hydrodynamic Characteristics of Immersed Buoyant Platform
Article

A Numerical Swallowing-Capacity Analysis of a Vacant, Cylindrical, Bi-Directional Tidal Turbine Duct in Aligned & Yawed Flow Conditions

1
Department of Naval Architecture, Ocean, and Marine Engineering, University of Strathclyde, Glasgow G4 0LZ, UK
2
Industrial Doctoral Centre for Offshore Renewable Energy (IDCORE), University of Edinburgh, Edinburgh EH8 9YL, UK
3
Électricité de France Research and Development, EDF R&D, Ile-de-France, 78400 Chatou, France
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Antonini
J. Mar. Sci. Eng. 2021, 9(2), 182; https://doi.org/10.3390/jmse9020182
Received: 31 December 2020 / Revised: 26 January 2021 / Accepted: 2 February 2021 / Published: 10 February 2021
(This article belongs to the Special Issue CFD Simulations of Marine Hydrodynamics)
Introducing a duct along the perimeter of a rotor has been acknowledged to augment turbine performance. The outcome causation due to a bi-directional, cylindrical shroud, however, is uncertain. This study analyses the hydrodynamic swallowing capacity of a true-scale, vacant duct for tidal turbine applications in aligned and yawed inlet flow conditions by utilising three-dimensional unsteady computational fluid dynamics. The performance is investigated within free-stream magnitudes of 1 to 7 m.s−1, and a bearing angular range of 0° to 45° with the duct axis. In proportion to the free-stream magnitude, the normalised axial velocity through the duct increases as a result of a diminishment in pressure drag. Within yawed flow, the maximum capacity falls at a bearing of 23.2°, resulting in a performance increase of 4.13% above that at aligned flow conditions. The analysis concludes that the augmentation at yawed flow occurs due to the duct cross-sectional profile lift variation with angle-of-attack. Towards nominal yaw angle, the internal static pressure reduces, permitting a higher mass-flow rate. Beyond the nominal angle-of-attack, flow separation occurs within the duct, increasing pressure drag, thereby reducing the swallowing capacity. View Full-Text
Keywords: swallowing capacity; duct flow; ducted turbine swallowing capacity; duct flow; ducted turbine
Show Figures

Figure 1

MDPI and ACS Style

Borg, M.G.; Xiao, Q.; Allsop, S.; Incecik, A.; Peyrard, C. A Numerical Swallowing-Capacity Analysis of a Vacant, Cylindrical, Bi-Directional Tidal Turbine Duct in Aligned & Yawed Flow Conditions. J. Mar. Sci. Eng. 2021, 9, 182. https://doi.org/10.3390/jmse9020182

AMA Style

Borg MG, Xiao Q, Allsop S, Incecik A, Peyrard C. A Numerical Swallowing-Capacity Analysis of a Vacant, Cylindrical, Bi-Directional Tidal Turbine Duct in Aligned & Yawed Flow Conditions. Journal of Marine Science and Engineering. 2021; 9(2):182. https://doi.org/10.3390/jmse9020182

Chicago/Turabian Style

Borg, Mitchell G.; Xiao, Qing; Allsop, Steven; Incecik, Atilla; Peyrard, Christophe. 2021. "A Numerical Swallowing-Capacity Analysis of a Vacant, Cylindrical, Bi-Directional Tidal Turbine Duct in Aligned & Yawed Flow Conditions" J. Mar. Sci. Eng. 9, no. 2: 182. https://doi.org/10.3390/jmse9020182

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop