Experimental evaluation of the wake characteristics of cross flow turbine arrays

ORDONEZ-SANCHEZ, Stephanie, SUTHERLAND, Duncan, PAYNE, Grégory S, BRUCE, Tom, GEBRESLASSIE, Mulualem Gebregiorgis, BELMONT, Michael R and MOON, Ian (2017). Experimental evaluation of the wake characteristics of cross flow turbine arrays. Ocean Engineering, 141, 215-226.

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Official URL: https://www.sciencedirect.com/science/article/pii/...
Link to published version:: https://doi.org/10.1016/j.oceaneng.2017.06.035


One key factor in the exploitation of tidal energy is the study of interactions of turbines when working in tidal turbine farms. The Momentum Reversal and Lift (MRL) turbine is a novel cross flow turbine. The three blades rotate around a common central horizontal axis which is parallel to their own axis and perpendicular to the flow. The novelty of the MRL turbine is that it relies on the combination of both lift and momentum reversal (drag) for energy extraction. Scaled MRL turbine models of 0.164 m in diameter were used to characterise the flow in three different tidal array settings. Detailed maps of axial velocity profiles and velocity deficits downstream of the turbine are presented, enabling the visualisation of characteristic flow patterns. The results show that the MRL generates lower velocity deficits and turbulence intensities in the near wake than those associated with horizontal axis turbines. The downstream wake was not completely symmetrical which was related to the geometry of the device but also due to the flow developed in the flume. Amongst the three array configurations studied, a fence of turbines with the lowest separation provided the highest power output.

Item Type: Article
Uncontrolled Keywords: 0405 Oceanography; 0905 Civil Engineering; 0911 Maritime Engineering; Civil Engineering; 4005 Civil engineering; 4012 Fluid mechanics and thermal engineering; 4015 Maritime engineering
Identification Number: https://doi.org/10.1016/j.oceaneng.2017.06.035
Page Range: 215-226
SWORD Depositor: Symplectic Elements
Depositing User: Symplectic Elements
Date Deposited: 29 Feb 2024 11:43
Last Modified: 29 Feb 2024 11:45
URI: https://shura.shu.ac.uk/id/eprint/33086

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