The design and commissioning of the first, circular, combined current and wave test basin

Ingram, David; Wallace, Robin; Robinson, Adam; Bryden, Ian

doi:10.1109/oceans-taipei.2014.6964577

Cited by 29 publications

(27 citation statements)

References 7 publications

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“…The investigation was conducted at the FloWave Ocean Energy Research Facility at The University of Edinburgh, which is a unique round wave tank with a diameter of 25 m and water depth 2 m for the upper test volume. The tank has the capability to reproduce complex wave condition from any direction combined with current [18][19][20][21]. The movement of the body and the free surface markers (six and three degrees of freedom respectively) was captured using a video motion capture system (Section 2.2), with twin wire resistance wave gauges measuring the incident wave conditions (Section 2.3).…”

Section: Investigated Casesmentioning

confidence: 99%

Experimental Data of a Floating Cylinder in a Wave Tank: Comparison Solid and Water Ballast

Gabl

Davey

Nixon

et al. 2019

Data

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The experimental set-up allows for the comparison of two different ballast options of a floating cylinder in a wave tank. Four different internal water drafts are tested as well as an equivalent solid ballast option. The model is excited by regular waves, which are characterised with five wave gauges in front of the floating cylinder and two behind. Additionally, the time series of the six-degree freedom response of the floating structure is made available. Regular waves with an initial amplitude of 0.05 m and frequencies over the range 0.3 to 1.1 Hz are investigated. This results in a wide range of different responses of the floating structure as well as very big rotations of up to 20 degrees. This dataset allows for identification of the influence caused by the sloshing of the interior water volume and can be used to validate numerical models of fluid–structure–fluid interaction.

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Section: Investigated Casesmentioning

confidence: 99%

Experimental Data of a Floating Cylinder in a Wave Tank: Comparison Solid and Water Ballast

Gabl

Davey

Nixon

et al. 2019

Data

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“…All the experimental measurements presented here were made at the FloWave Ocean Energy Research Facility, located at the University of Edinburgh (UoE), U.K. [26] ( Figure 3). The facility is a circular, combined wave and current basin, with a diameter of 25 m and a nominal water depth of 2 m. Waves are generated using 168 active-absorbing force-feedback wavemakers around the entire circumference.…”

Section: The Test Facilitymentioning

confidence: 99%

Assessing extreme loads on a tidal turbine using focused wave groups in energetic currents

et al. 2019

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Tidal stream turbines are subject to large hydrodynamic loads, including those induced by extreme waves. Scale model testing in the laboratory plays an important role in ensuring that full scale tidal turbines are designed and operated in a manner that is appropriate for harsh ocean environments where waves and tidal currents coexist. For the first time, a fully-instrumented scaled tidal turbine is tested in short-duration focused wave groups representative of extreme environmental load cases expected at energetic tidal sites. In this paper, the subsequent variations in rotor-based loads, power and blade root bending moments are reported. These measurements are found to strongly follow the spectral and temporal form of the focused wave conditions, and peak loads and power output are found to exceed current-only values by 85% and 200% respectively. These rotor-averaged values display a high level of repeatability, demonstrating the suitability of focused waves for testing seabed-mounted tidal turbines. Extreme blade loads, which are dependent on angular position relative to wave phase, are captured through rapidly obtained repeat tests. New insight is subsequently gained into loading and response of tidal turbines in extreme sea conditions.

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“…All experimental measurements presented here were made at the FloWave Ocean Energy Research Facility (Figure 2), based at the University of Edinburgh, U.K. [11]. The facility is a 25 m-diameter, circular, combined wave and current basin.…”

Section: The Flowave Ocean Energy Research Facilitymentioning

confidence: 99%

“…As part of FloWTurb, physical model testing is carried out at the FloWave Ocean Energy Research Facility [11], Edinburgh, U.K., where fully instrumented scaled turbines will be subjected to combined wave-current fields. The first stage of this work is focussed on the process of re-creating observed site conditions and understanding the wave-current testing environment.…”

Section: Introductionmentioning

confidence: 99%

Re-Creating Waves in Large Currents for Tidal Energy Applications

et al. 2017

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Unsteady wave loading on tidal turbines impacts significantly the design, and expected life-time, of turbine blades and other key components. Model-scale testing of tidal turbines in the wave-current environment can provide vital understanding by emulating real-world load cases; however, to reduce uncertainty, it is important to isolate laboratory-specific artefacts from real-world behaviour. In this paper, a variety of realistic combined current-wave scenarios is re-created at the FloWave basin, where the main objective is to understand the characteristics of testing in a combined wave-current environment and assess whether wave effects on the flow field can be predicted. Here, we show that a combination of linear wave-current theory and frequency-domain reflection analysis can be used to effectively predict wave-induced particle velocities and identify velocity components that are experimental artefacts. Load-specific mechanisms present in real-world conditions can therefore be isolated, and equivalent full-scale load cases can be estimated with greater confidence. At higher flow speeds, a divergence from the theory presented is observed due to turbulence-induced non-stationarity. The methodology and results presented increase learning about the wave-current testing environment and provide analysis tools able to improve test outputs and conclusions from scale model testing.

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The design and commissioning of the first, circular, combined current and wave test basin

Cited by 29 publications

References 7 publications

Experimental Data of a Floating Cylinder in a Wave Tank: Comparison Solid and Water Ballast

Experimental Data of a Floating Cylinder in a Wave Tank: Comparison Solid and Water Ballast

Assessing extreme loads on a tidal turbine using focused wave groups in energetic currents

Re-Creating Waves in Large Currents for Tidal Energy Applications

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