An actuator disc analysis of a ducted high-solidity tidal turbine in yawed flow

Borg, Mitchell and Xiao, Qing and Incecik, Atilla and Allsop, Steven and Peyrard, Christophe; (2019) An actuator disc analysis of a ducted high-solidity tidal turbine in yawed flow. In: ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. ASME, GBR. ISBN 9780791858899 (https://doi.org/10.1115/OMAE2019-96014)

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Abstract

This work elaborates a computational fluid dynamic model utilised in the investigation of the hydrodynamic performance concerning a ducted high-solidity tidal turbine in yawed inlet flows. Analysing the performance at distinct bearing angles with the axis of the turbine, increases in torque and mechanical rotational power were acknowledged to be induced within a limited angular range at distinct tip-speed ratio values. Through multiple yaw iterations, the peak attainment was found to fall between bearing angles of 15 degrees and 30 degrees, resulting in a maximum power increase of 3.22%, together with an extension of power development to higher tip-speed ratios. In confirmation, these outcomes were subsequently analysed by means of actuator disc theory, attaining a distinguishable relationship with blade-integrated outcomes.

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