Investigations on the hydrodynamic interference of the multi-rotor vertical axis tidal current turbine

Sun, Ke; Ji, Renwei; Zhang, Jianhua; Li, Yan; Wang, Bin

doi:10.1016/j.renene.2021.01.055

Cited by 20 publications

(4 citation statements)

References 28 publications

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“…Therefore, continuous efforts have been made to enhance the Savonius turbine performance in recent years. For example, placing a deflector redirecting the flow away from the returning blade [16][17][18], reasonable array arrangement [19][20][21], and the hybrid lift-type turbine increasing the efficiency [22], etc. are all possible approaches to improve efficiency.…”

Section: Nomenclaturementioning

confidence: 99%

Investigations on the wave performance of Savonius turbine operating under initial phase-locked strategy

Li,

Yao,

Eskilsson

et al. 2023

Physics of Fluids

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Savonius hydrokinetic turbines (SHTs), categorized as emerging cyclic-type wave energy converters (WECs), have demonstrated notable potential in achieving elevated energy conversion efficiency and consistent power output. This performance is particularly observed when operating under the initial phase-locked strategy (IPLS), marking a significant advancement in the realm of wave energy harvesting. However, a thorough exploration of the influences stemming from wave conditions and turbine design remains an area that warrants further investigation for advancing the performance of SHT-WECs under the proper operational strategy. This study undertakes an exhaustive analysis of geometric parameters, encompassing turbine diameter, blade number, and thickness. An experiment-validated numerical model based on the unsteady two-phase Reynolds-averaged Navier–Stokes equations is adopted in the research. Comprehensive investigations include analyses of flow fields around the turbine, pressure distributions on blade surfaces, and dynamic torque variations. These analyses serve to elucidate the variation rules of hydrodynamic characteristics and their influential mechanisms. The results highlight the notable impact of the proposed “relative-short wavelength impact” on the performance of SHT-WECs operating under IPLS conditions. Notably, no significant impact is observed when the relative wavelength exceeds 17. Optimal performance is achieved with the thinnest and two-bladed turbine configuration. Moreover, optimizing the turbine diameter significantly enhances SHT-WEC conversion efficiency, with the attained maximum value reaching approximately 18.6%. This study offers a concise guideline for designing turbine diameters in alignment with specific wave conditions.

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Section: Nomenclaturementioning

confidence: 99%

Investigations on the wave performance of Savonius turbine operating under initial phase-locked strategy

Li,

Yao,

Eskilsson

et al. 2023

Physics of Fluids

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“…The fluid kinetic energy is converted into electric power through MCTs [3]. MCTs are mainly composed of turbine and generator, which is a typical mechatronics system [4]. The velocity of the marine current is the main factor that changes the operating state of the MCTs.…”

Section: Mct Blade Fault Root Causesmentioning

confidence: 99%

A Mini Review of Research on Blade Fault Detection of Marine Current Turbine

Wang

2021

ACET

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“…High-fidelity blade-resolved CFD should be used to effectively capture these phenomena, but it is highly demanding due to the spatial and temporal resolution required, as shown in [15]. It is prohibitive to use CFD blade-resolved for turbine arrays: small clusters of three or four turbines are usually simulated only in two-dimensional domains, as in [16,17] or in [18]. There are some computationally efficient turbine parametrizations based on the Actuator Line Model (ALM), as in [19], but they are still highly demanding to perform arrays, as stated in [20].…”

Section: Introductionmentioning

confidence: 99%

Vertical-Axis Tidal Turbines: Model Development and Farm Layout Design

Pucci,

Spina,

Zanforlin

2024

Energies

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In this paper, we propose a new 3D model for vertical-axis tidal turbines (VATTs) embedded in the shallow-water code SHYFEM. The turbine model is based on the Blade-Element∖Momentum (BEM) theory and, therefore, is able to predict turbine performance based on the local flow conditions and the geometric characteristics of the turbine. It is particularly suitable for studying turbine arrays, as it can capture the interactions between the turbines. For this reason, the model is used to test a tidal farm of 21 devices with fluid dynamic simulations. In particular, we deploy the farm at Portland Bill, which is a marine site characterised by a wide spread in the direction of the tidal currents during a flood-ebb tide cycle. We optimised the lateral and longitudinal spacing of the turbines in a fence using computational fluid dynamics simulations and then performed a sensitivity analysis by changing the distance between the fences. The results show that the greater the distance between the fences, the higher the power output. The increase in power generation is around 16%, but this implies a huge increase in the horizontal extent of the farm. Further assessments should be carried out, as the expansion of a marine area dedicated to energy exploitation may conflict with other stakeholder interests.

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Investigations on the hydrodynamic interference of the multi-rotor vertical axis tidal current turbine

Cited by 20 publications

References 28 publications

Investigations on the wave performance of Savonius turbine operating under initial phase-locked strategy

Investigations on the wave performance of Savonius turbine operating under initial phase-locked strategy

A Mini Review of Research on Blade Fault Detection of Marine Current Turbine

Vertical-Axis Tidal Turbines: Model Development and Farm Layout Design

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