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Experimental evaluation of horizontal-axis marine current turbine using two scale models

Citation

Rahimian, M and Walker, J and Penesis, I and Frost, R and Chai, S, Experimental evaluation of horizontal-axis marine current turbine using two scale models, Proceedings of the 11th European Wave and Tidal Energy Conference, 6-11 September 2015, Nantes, France, pp. 1-9. ISSN 2309-1983 (2015) [Refereed Conference Paper]


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Copyright Statement

Copyright 2015 European Wave and Tidal Energy Conference

Official URL: http://www.ewtec.org/proceedings/

Abstract

Horizontal-axis marine current turbines (HAMCTs) are devices which harness kinetic energy from oceans, rivers or straits. Model scale tests are a trusted method to define the hydrodynamic characteristics of HAMCTs, and can also be used to optimise turbine design and validate numerical models.

This paper presents experimental results for model-scale 2-bladed HAMCTs with diameters of 800 mm and 500 mm, tested in a circulating water channel (CWC). Power and thrust coefficients were presented as a function of tip speed ratio at different Reynolds numbers. The effects of model scale and Reynolds number on the results were examined by comparing the experiment results between the two models. Given the tests were done in a CWC with turbulent flow; the results are lower than expected. Different hydrodynamic performance characteristics were obtained for the two scale models due to influence of model scale. The results of the 800 mm rotor are less dependent on Reynolds number for inflow speeds of 1.5 m/s and 1.7 m/s; whilst the smaller model results are affected by low Reynolds number. Having some information about the turbulence intensity of the flow during a test would lead to have a better understanding of the hydrodynamic performance of turbines.

Item Details

Item Type:Refereed Conference Paper
Keywords:marine current turbine, model test, circulating water channel, scaling effect, Reynolds number effect
Research Division:Engineering
Research Group:Mechanical Engineering
Research Field:Energy Generation, Conversion and Storage Engineering
Objective Division:Energy
Objective Group:Renewable Energy
Objective Field:Tidal Energy
UTAS Author:Rahimian, M (Dr Masoud Rahimian)
UTAS Author:Walker, J (Mr James Walker)
UTAS Author:Penesis, I (Associate Professor Irene Penesis)
UTAS Author:Frost, R (Mr Rowan Frost)
UTAS Author:Chai, S (Professor Shuhong Chai)
ID Code:103087
Year Published:2015
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2015-09-19
Last Modified:2016-09-05
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