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Experimental testing of bi-directional tidal turbine rotors
conference contribution
posted on 2023-05-23, 10:54 authored by Cropp, C, Irene PenesisIrene Penesis, Walker, J, Liu, P, Rowan FrostRowan FrostPerformance characteristics of 7 bi-directional tidal turbine rotors were investigated in a circulating water channel (CWC). The effects of Reynolds number, pitch distribution, pitch ratio and solidity were evaluated and the influence of testing in turbulent flow discussed. An open boat assembly was used to house a Cussons dynamometer, to measure torque and thrust, and a Dunkermotor to control the shaft speed. The findings indicated that testing in the CWC, as opposed to a towing tank (TT), will produce a maximum power coefficient of approximately 50% less. This was attributed to the threedimensional turbulent flow of the CWC and the sensitivity of the performance characteristics of a horizontal axis tidal turbine (HATT) with respect to the inflow quality. Reynolds independence was reached at an inflow speed of 1.5 m/s; with maximum performance characteristics obtained by rotor 6, with a solidity ratio of 0.4. Further work to investigate rotor pitch can be carried out to optimise this type of rotor and complete a baseline data set necessary for organising full scale testing and analysis.
History
Publication title
Proceedings of the 11th European Wave and Tidal Energy ConferenceEditors
AH ClementPagination
1-7ISSN
2309-1983Department/School
Australian Maritime CollegePublisher
EWTECPlace of publication
FranceEvent title
11th European Wave and Tidal Energy ConferenceEvent Venue
Nantes, FranceDate of Event (Start Date)
2015-09-06Date of Event (End Date)
2015-09-11Rights statement
Copyright 2015 European Wave and Tidal Energy Conference 2015Repository Status
- Restricted