Investigation into wave—current interactions in marine current turbines

Barltrop, Nigel; Varyani, K.S.; Grant, Andrew; Clelland, David; Pham, X.P.

doi:10.1243/09576509jpe315

Cited by 62 publications

(30 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Reynolds number at 75% radius was between 0.87-1.52 × 10 5 in the present cases. Although it was still lower than that expected of the prototype tidal turbines, it was at the same level compared to the previous towing model tests [3,4,6,12]. The carriage velocity of 0.56 m s −1 and 0.68 m s −1 is equivalent to 2.8 m s −1 and 3.4 m s −1 in full scale respectively, which are the general rated current speed for tidal turbines.…”

Section: Results and Discussion Average Power And Trust Coefficientsmentioning

confidence: 54%

See 1 more Smart Citation

The Effects of Surface Waves and Submergence on the Performance and Loading of a Tidal Turbine

Guo

Gao

Yang

et al. 2017

Volume 7B: Ocean Engineering

View full text Add to dashboard Cite

Tidal energy has the advantages of high predictability, high energy density, and limited environmental impacts. As tidal turbines are expected to be used in the most energetic waters where there might be significant waves, the assessment of unsteady hydrodynamic load due to surface waves is of great concern. The objective of this paper is to assess the effects of surface waves and submergence of the turbine on the power performance and loads * Address all correspondence to this author. of a tidal turbine by experimental approach. The experiments on a 1 : 25th model tidal turbine were carried out in a towing tank. A wide range of regular waves with periods from 1.0 s to 3.0 s at model scale were generated. Different submergence conditions were considered to investigate the effects of the presence of free surface. The cases with blade tip partly going out of water were also performed. The regular waves did not have significant influences on average loads and power output in the present experiments, but caused large amplitude of the cyclic variation of the loads. The amplitudes of the cyclic load were proved to be 1 Copyright c 2017 by ASME proportional to the incident wave height, and to be sensitive to the wave frequency and submergence of the rotor. As the tidal turbine getting close to free surface, significant waves were induced by the underwater rotating blade. The effects of surface waves and submergence need to be taken into account in design.

show abstract

Section: Results and Discussion Average Power And Trust Coefficientsmentioning

confidence: 54%

“…Barltrop et al [4] performed experiments using a 400 mm diameter rotor in a towing tank with the presence of regular waves. The average thrust and torque were found to be independent with the wave frequencies or wave heights.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Surface Waves and Submergence on the Performance and Loading of a Tidal Turbine

Guo

Gao

Yang

et al. 2017

Volume 7B: Ocean Engineering

View full text Add to dashboard Cite

show abstract

“…In 2007, Barltrop and co-workers studied the effects of waves towards loading on turbine blades using an extended BEM model. It was found that a shorter wave might lead to the stalling of the blade and consequently, increase the axial loading on it [84] Experiments were conducted to validate the model. Their process of aerofoil selection is different from that of Bahaj's team.…”

Section: Design Considerationmentioning

confidence: 99%

2002–2012: 10 Years of Research Progress in Horizontal-Axis Marine Current Turbines

Lam

2013

Energies

View full text Add to dashboard Cite

Research in marine current energy, including tidal and ocean currents, has undergone significant growth in the past decade. The horizontal-axis marine current turbine is one of the machines used to harness marine current energy, which appears to be the most technologically and economically viable one at this stage. A number of large-scale marine current turbines rated at more than 1 MW have been deployed around the World. Parallel to the development of industry, academic research on horizontal-axis marine current turbines has also shown positive growth. This paper reviews previous research on horizontal-axis marine current turbines and provides a concise overview for future researchers who might be interested in horizontal-axis marine current turbines. The review covers several main aspects, such as: energy assessment, turbine design, wakes, generators, novel modifications and environmental impact. Future trends for research on horizontal-axis marine current turbines are also discussed.

show abstract

“…Several groups have investigated the influence of surface waves on tidal turbine performance [4][5][6][7]. These researchers conducted experiments to measure the turbine performance with and without the presence of surface waves.…”

Section: Introductionmentioning

confidence: 99%

Scale-Model Experiments for the Surface Wave Influence on a Submerged Floating Ocean-Current Turbine

Shirasawa¹,

Minami²,

Shintake³

2017

Energies

View full text Add to dashboard Cite

Abstract:In order to harness the kinetic energy of marine currents, we propose a novel ocean-current turbine with a horizontal axis. The turbine can be moored to the seabed and function similarly to kites in a water flow. To operate such turbines in a marine current, the resulting rotor torque needs to be canceled. Therefore, the proposed turbine is designed with a float at its top and a counterweight at its bottom. Thus far, we have verified the turbine stability and blade performance through towing experiments. As the next step, we constructed a scale-model turbine to confirm the mooring system. This experiment was performed at a circulating water channel with wave-making facilities. The influence of waves on the floating body was also investigated. In this paper, we report the behavior of the scale-model turbine moored to the tank bottom and discuss the influence of surface waves.

show abstract

Investigation into wave—current interactions in marine current turbines

Cited by 62 publications

References 3 publications

The Effects of Surface Waves and Submergence on the Performance and Loading of a Tidal Turbine

The Effects of Surface Waves and Submergence on the Performance and Loading of a Tidal Turbine

2002–2012: 10 Years of Research Progress in Horizontal-Axis Marine Current Turbines

Scale-Model Experiments for the Surface Wave Influence on a Submerged Floating Ocean-Current Turbine

Contact Info

Product

Resources

About