Experimental testing of the performance and interference effects of a cross-stream array of tidal turbines

McNaughton, James; Cao, Bowen; Ettema, S.; Arcos, Federico Zilic de; Vogel, Christopher R.; Willden, Rhj

doi:10.1201/9781003134572-64

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…Instead we adopt a trailing-edge thickening function from [12] which offers an alternative approach that adds thickness to both sides of the trailing section of the foil without altering the foil's camber line, and maintains its hydrodynamic performance. This thickening method has been successfully employed in Oxford's previous 1.2 m tidal turbine design in [13]. The equation of the thickening function is given as…”

Section: A Hydrofoil Profilementioning

confidence: 99%

“…The rotor blades were designed using an in-house RANS Blade Element (RANS-BE) actuator disk type model embedded through a User Defined Function in Fluent, with the k − ω SST model used to provide turbulence closure. The model works to iteratively twist and taper the blades to achieve design angle of attack and loading distributions along each blade; further details of the method can be found in [13].…”

Section: B Blade Designmentioning

confidence: 99%

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Tidal Turbine Benchmarking Project: Stage I - Steady Flow Experiments

Tucker Harvey,

Chen,

Rowe

et al. 2023

Proc. EWTEC

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The tidal turbine benchmarking project, funded by the UK's EPSRC and the Supergen ORE Hub, has conducted a large laboratory scale experiment on a highly instrumented 1.6m diameter tidal rotor. The turbine is instrumented for the measurement of spanwise distributions of flapwise and edgewise bending moments using strain gauges and a fibre Bragg optical system, as well as overall rotor torque and thrust. The turbine was tested in well-defined flow conditions, including grid-generated freestream turbulence, and was towed through the 12.2m wide, 5.4m deep long towing tank at Qinetiq’s Haslar facility. The turbine scale was such that blade Reynolds numbers were Re=3x10^5 and therefore post-critical, whilst turbine blockage was kept low at 3.1. In order to achieve higher levels of freestream turbulence a 2.4m by 2.4m turbulence grid was towed 5m upstream of the turbine. Measurements to characterise the grid generated turbulence were made at the rotor plane using an Acoustic Doppler Velocimeter and a five-hole pressure probe. An elevated turbulence of 3.1% with homogeneous flow speed across the rotor plane was achieved using the upstream turbulence grid. The experimental tests are well defined and repeatable, and provide relevant data for validating models intended for use in the design and analysis of full-scale turbines. This paper reports on the first experimental stage of the tidal benchmarking programme, including the design of the rotor and comparisons of the experimental results to blade resolved numerical simulations.

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Section: A Hydrofoil Profilementioning

confidence: 99%

Section: B Blade Designmentioning

confidence: 99%

Tidal Turbine Benchmarking Project: Stage I - Steady Flow Experiments

Tucker Harvey,

Chen,

Rowe

et al. 2023

Proc. EWTEC

View full text Add to dashboard Cite

show abstract

“…Furthermore, in a cluster of laboratory scales, the number of tested devices is limited. The following references are examples of experimental studies on hydrokinetic turbines: [2][3][4], where the number of tested devices increased from two to a maximum of four. On the other hand, the in situ studies with prototypes of proper sizes allow evaluating realistic flow conditions, but they are often limited to single devices.…”

Section: Introductionmentioning

confidence: 99%

A BEM-Based Model of a Horizontal Axis Tidal Turbine in the 3D Shallow Water Code SHYFEM

Pucci

Garbo

Bellafiore

et al. 2022

JMSE

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We present a novel 3D implementation of a horizontal axis tidal turbine (HATT) in the shallow water hydrostatic code SHYFEM. The uniqueness of this work involves the blade element momentum (BEM) approach: the turbine is parameterized by applying momentum sink terms in the x and y momentum equations. In this way, the turbine performance is the result of both the flow conditions and the turbine’s geometric characteristics. For these reasons, the model is suitable for farm-layout studies, since it is able to predict the realistic behavior of every turbine in a farm, considering the surrounding flow field. Moreover, the use of a shallow water code, able to reproduce coastal morphology, bathymetry wind, and tide effects, allows for studying turbine farms in realistic environments.

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Experimental testing of the performance and interference effects of a cross-stream array of tidal turbines

Cited by 2 publications

References 4 publications

Tidal Turbine Benchmarking Project: Stage I - Steady Flow Experiments

Tidal Turbine Benchmarking Project: Stage I - Steady Flow Experiments

A BEM-Based Model of a Horizontal Axis Tidal Turbine in the 3D Shallow Water Code SHYFEM

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