The effects of turbulence intensity on the downstream performance of horizontal axis tidal stream turbines

Masters, I.; Williams, A.; Edmunds, M.; Pyakurel, P.; VanZwieten, J. (2017). The effects of turbulence intensity on the downstream performance of horizontal axis tidal stream turbines. Paper presented at VII International Conference on Computational Methods in Marine Engineering (MARINE 2017), Nantes, France.

@conference{Masters-2017-3472,
author = {Masters, I and Williams, A and Edmunds, M and Pyakurel, P and VanZwieten, J},
title = {The effects of turbulence intensity on the downstream performance of horizontal axis tidal stream turbines},
year = {2017},
month = {may},
series = {VII International Conference on Computational Methods in Marine Engineering (MARINE 2017)},
pages = {12},
address = {Nantes, France},
url = {https://www.researchgate.net/publication/316922671_The_effects_of_turbulence_intensity_on_the_downstream_performance_of_horizontal_axis_tidal_stream_turbines/link/59196124aca27200fe53046c/download},
keywords = {Current, Axial Flow Turbine, Tidal, Modeling, Hydrodynamics, Performance},
}

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TY - CONF
TI - The effects of turbulence intensity on the downstream performance of horizontal axis tidal stream turbines
AU - Masters, I
AU - Williams, A
AU - Edmunds, M
AU - Pyakurel, P
AU - VanZwieten, J
T2 - VII International Conference on Computational Methods in Marine Engineering (MARINE 2017)
C1 - Nantes, France
AB - This study focuses on a comparison of model results from a blade element momentum computational fluid dynamics (BEM-CFD) steady state RANS model, and a BEMT model that accounts for the wake generated from upstream turbines using analytic expressions. Rotor forces are calculated using 3D hydrofoil profile data. Both techniques are validated against existing experimental data, and then used to assess the power extraction of downstream turbines. Turbulent inflow conditions of 3% and 7% are applied, and the results of power extraction assessed. Particular attention is paid to the velocity field, with respect to the downstream wake, to assess how the turbulence characteristics effect the recovery rate and downstream power potential. Both models highlight the different recovery rates of the two turbulent conditions.
DA - 2017/05//
PY - 2017
SP - 12
UR - https://www.researchgate.net/publication/316922671_The_effects_of_turbulence_intensity_on_the_downstream_performance_of_horizontal_axis_tidal_stream_turbines/link/59196124aca27200fe53046c/download
LA - English
KW - Current
KW - Axial Flow Turbine
KW - Tidal
KW - Modeling
KW - Hydrodynamics
KW - Performance
ER -

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Abstract

This study focuses on a comparison of model results from a blade element momentum computational fluid dynamics (BEM-CFD) steady state RANS model, and a BEMT model that accounts for the wake generated from upstream turbines using analytic expressions. Rotor forces are calculated using 3D hydrofoil profile data. Both techniques are validated against existing experimental data, and then used to assess the power extraction of downstream turbines. Turbulent inflow conditions of 3% and 7% are applied, and the results of power extraction assessed. Particular attention is paid to the velocity field, with respect to the downstream wake, to assess how the turbulence characteristics effect the recovery rate and downstream power potential. Both models highlight the different recovery rates of the two turbulent conditions.