Validation of the dynamic load characteristics on a Tidal Stream Turbine when subjected to wave and current interaction

Lloyd, Catherine; Allmark, Matthew; Ordóñez-Sánchez, Stephanie; Martínez, Rodrigo; Johnstone, Cameron; Germain, Grégory; Gaurier, Benoît; Mason-Jones, Allan; O'Doherty, Timothy

doi:10.1016/j.oceaneng.2020.108360

Cited by 16 publications

(3 citation statements)

References 31 publications

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“…This procedure thus helped to better account for the velocity fluctuations perceived in synchronisation with the turbine. Another approach presented by [26] recommends to use the statistical mode of the velocity recorded instead of the mean velocity when calculating the performance coefficients. Using the mode of the flow velocity, differences in the performance coefficients of up to 12% are obtained when compared to the values obtained with the mean of the flow velocity.…”

Section: Flow Measurement and Locationsmentioning

confidence: 99%

Tidal Energy Round Robin Tests: A Comparison of Flow Measurements and Turbine Loading

Martínez

Gaurier

Ordóñez-Sánchez

et al. 2021

JMSE

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A Round Robin Tests program is being undertaken within the EC MaRINET2 initiative. This programme studies the used facility influence can have on the performance evaluation of a horizontal axis tidal turbine prototype when it is operated under wave and current conditions. In this paper, we present the design of experiments that is used throughout the work programme and the results related to the flow characterisation obtained at the Ifremer wave and current circulating tank, the Cnr-Inm wave towing tank and the ocean research facility FloWave. These facilities have been identified to provide adequate geometric conditions to accommodate a 0.724 m diameter turbine operating at flow velocities of 0.8 and 1.0 m/s. The set-up is replicated in each of the facilities with exemption of the amount of flow measuring instruments. Intrinsic differences in creating wave and currents between facilities are found. Flow velocities are up to 10% higher than the nominal values and wave amplitudes higher than the target values by up to a factor of 2. These discrepancies are related to the flow and wave generation methods used at each facility. When the flow velocity is measured besides the rotor, the velocity presents an increase of 8% compared to the upstream measurements.

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Section: Flow Measurement and Locationsmentioning

confidence: 99%

Tidal Energy Round Robin Tests: A Comparison of Flow Measurements and Turbine Loading

Martínez

Gaurier

Ordóñez-Sánchez

et al. 2021

JMSE

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“…Many laboratoryscale experiments detail the effects of upstream devices both in low turbulence and high turbulence scenarios with results presented in a phenomenological sense [6,14,15,17,27,28]. There has also been significant research into combined wave and current effects with both regular and irregular waves [8,9,25,29,30]. There have been studies considering combine turbulence and velocity shear flows [11,12,16,29,[31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…There has also been significant research into combined wave and current effects with both regular and irregular waves [8,9,25,29,30]. There have been studies considering combine turbulence and velocity shear flows [11,12,16,29,[31][32][33].…”

Section: Introductionmentioning

confidence: 99%

A Phenomenological Study of Lab-Scale Tidal Turbine Loading under Combined Irregular Wave and Shear Flow Conditions

Allmark

Martínez

Ordóñez-Sánchez

et al. 2021

JMSE

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Tidal devices are likely to faced with shear flows and subjected to various wave climates. The paper presents an experimental study of the combined impacts of shear profile and irregular waves on the loading of a 1/20th scale device operating at peak power extraction. The experiments presented were conducted at various depths to facilitate analysis of the effects of the shear flow and wave impact on the device at various positions in the water column. The fluid field was measured at three different upstream positions and at three depths (top, middle and bottom of the rotor) for each experiment; in doing so, data from the device were captured three times. The fluid measurements were of a high quality and were analysed to present the structure flow upstream of the device, which contained velocity and turbulence profiles. The upstream measurement was utilised to understand the development of flow structures in the approach to the device, and the impact of the flow structures measured was confirmed via cross-covariance calculations. The long datasets gathered were used to produce full rotational probability density functions for the blade-root-bending moments for three blades. The spectral characteristics were also considered, and showed that rotor loading quantities are less reactive to smaller scale flow structures.

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Blockage and submersion depth effects on horizontal-axis tidal turbine (HATT) in a shear flow environment with wave–current interaction

Rotor,

Magno,

Boiser

et al. 2024

Mar Syst Ocean Technol

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Validation of the dynamic load characteristics on a Tidal Stream Turbine when subjected to wave and current interaction

Cited by 16 publications

References 31 publications

Tidal Energy Round Robin Tests: A Comparison of Flow Measurements and Turbine Loading

Tidal Energy Round Robin Tests: A Comparison of Flow Measurements and Turbine Loading

A Phenomenological Study of Lab-Scale Tidal Turbine Loading under Combined Irregular Wave and Shear Flow Conditions

Blockage and submersion depth effects on horizontal-axis tidal turbine (HATT) in a shear flow environment with wave–current interaction

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