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Effect of waves on the leading-edge undulated tidal turbines

Shi, Weichao and Atlar, Mehmet and Norman, Rosemary and Day, Sandy and Aktas, Batuhan (2019) Effect of waves on the leading-edge undulated tidal turbines. Renewable Energy, 131. pp. 435-447. ISSN 0960-1481

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Abstract

This paper presents an investigation on the efficiency performance of the leading-19 edge undulated tidal turbine blades under the effect of waves. This biomimetic blade 20 application is inspired by humpback whale flippers which provide these mammals with an 21 exceptional manoeuvring ability that is mainly accredited to the beneficial of their leading-22 edge tubercles. The paper first presents the design, optimisation and experimental validation 23 of these turbine models. With the aim of further validating the efficiency performance in a 24 different testing environment as well as exploring the combined effect of the tidal current 25 and wave interaction, a test campaign in a towing tank facility was conducted. Both regular 26 and irregular wave conditions were considered combining with varying towing speeds to 27 simulate the tidal current effect. The test results revealed that the leading-edge undulated 28 turbine has a stable hydrodynamic performance over a combined range of current speeds and 29 waves indicating that the overall performance was not affected considerably by the combined 30 effects as opposed to the performance solely due to steady tidal current.