A Validated BEM Model to Analyse Hydrodynamic Loading on Tidal Stream Turbine Blades

Steven Allsop, Christophe Peyrard, Philipp R. Thies, Evangelos Boulougouris, Gareth Harrison

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper details a Blade Element Momentum (BEM) model for a 3 bladed, horizontal axis Tidal Stream Turbine (TST). The code capabilities are tested and validated by applying a range of different turbine parameters and operating conditions, where results are compared to numerous validation datasets. The model shows excellent agreement to performance and thrust measurements for 3 of the 4 datasets. Additionally, compared to other BEM models, improved correlations are seen at high rotational speeds. The fourth case shows over predictions of around 30% in power at peak operating speed. In this case, CFD studies show better correlation due to the ability to capture detailed flow features around the blade as well as free surface effects, however require 3 to 4 orders of magnitude greater computational cost. Steady, non-uniform inflow functionality is incorporated into the model, where distributions of thrust and torque along the blade as well as cyclic loads are determined. These show the potential of the model to be used in combination with tools such as stress and fatigue analyses to improve the blade design process.
Original languageEnglish
Title of host publicationAsian Wave and Tidal Energy Conference (AWTEC 2016)
Place of PublicationSingapore
Publication statusPublished - Oct 2016

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