An optimally-controlled RANS Actuator force model for efficient computations of tidal turbine arrays

Clary, Vincent; Oudart, Thibault; Larroudé, Philippe; Sommeria, Joël; Maı̂tre, Thierry

doi:10.1016/j.oceaneng.2020.107677

Cited by 18 publications

(9 citation statements)

References 26 publications

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“…The velocity deficiency was further analysed using the normalized velocity plot. This study also will be validated with two experimental data from [16] and [17].…”

Section: Resultsmentioning

confidence: 89%

“…This is because the turbine's blades affect the incoming flow as it travels through the turbine. The study then proceeds by evaluating the simulation result for configuration A, which consists of a single turbine, to an experimental result obtained by Clary et al [16], who used the Darrieus turbine model in the study. The wake slicing point is the location where the turbulence data is extracted for analysis.…”

Section: Comparison Between Experimental Data and Simulation Datamentioning

confidence: 99%

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Numerical Analysis of Wake Interaction of Darrieus Tidal Turbine in Shallow Water Application

Marzuki¹,

Rahman²,

Abdul-Rahman³

et al. 2022

JAMEA

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Malaysia is rich in natural resources including coal and fossil fuels. These natural resources, however, will diminish and pollute the ecosystem. Thus, researchers have proposed the use of renewable energy sources such as solar, wind, wave, and other energies as potential solutions to resolve the issue. This study focuses on tidal energy, specifically the vertical axis tidal turbine (VATT) for shallow water application. While a majority of the VATT research shows that this device can work effectively in deep water, its effectiveness in shallow water has yet to be explored comprehensively. To analyse the turbine's performance, Computational Fluid Dynamics (CFD) method was applied. The Darrieus turbine was used in this study since it is the ideal turbine design for shallow water in Malaysia with an average current speed of 1.0 𝑚𝑚𝑚𝑚−1. The Darrieus turbine model used in this project is 5 metres tall and 4.3 metres in diameter. The simulation was evaluated based on wake characteristics. The Darrieus turbine was designed using the NACA0018 airfoil. Following the results of single turbine analysis, the wake has recovered to its ambience velocity at 60 metres behind the device. The wake generation due to the multi-row configuration of the devices was also examined. The three-turbine configuration verifies the concept that installing two turbines side by side boosts the performance significantly. Notably, the improvement is sufficient to mitigate the adverse effects due to the turbulence wakes from upstream turbines. The findings demonstrate that by employing a staggered design (1 device upstream and 2 devices downstream), the wake can recover its initial velocity faster due to a shorter wake generation distance.

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“…The velocity deficiency was further analysed using the normalized velocity plot. This study also will be validated with two experimental data from [16] and [17].…”

Section: Resultsmentioning

confidence: 89%

Section: Comparison Between Experimental Data and Simulation Datamentioning

confidence: 99%

Numerical Analysis of Wake Interaction of Darrieus Tidal Turbine in Shallow Water Application

Marzuki¹,

Rahman²,

Abdul-Rahman³

et al. 2022

JAMEA

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show abstract

“…It was an important basis for determining speed conditions and working characteristics [34] and was thus one of the evaluation criteria for optimization and research. As shown in Figure 2 below, many works have obtained relevant data and drawn the characteristic curve through experiments or numerical methods [35][36][37]. With the increase of speed from zero, the power coefficient first increases and then decreases; a peak exists.…”

Section: Parameters Of Evaluation In Optimization 21 Power Coefficien...mentioning

confidence: 99%

“…Clary et al [35] conducted a numerical simulation on the horizontal arrangement of the Darrieus turbines in a river, in which the spacing in the same row and the spacing between rows were adjusted. The simulation results show that the performance of the turbine improved by 24% when the spacing of the horizontal rows was 1.2D.…”

Section: Multi-turbine Arrangementmentioning

confidence: 99%

A Review: Design and Optimization Approaches of the Darrieus Water Turbine

Tan

et al. 2023

Sustainability

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As the use of Darrieus turbines in water is becoming increasingly popular in the field of renewable energy, it is essential to explore and evaluate existing research efforts. The situation of the Darrieus water turbine in water still requires further discussion. This paper aims to provide a comprehensive review of optimization methods for Darrieus water turbines, addressing the challenges associated with their efficiency, start-up, and stability. This work summarizes and evaluates the findings of previous studies, focusing on the features of experimental and numerical methods. Influence of geometric parameters, including height-diameter ratio, solidity, torsional angle, and airfoil are also talked into. The existing research adopts solidity values ranging from 0.1 to 0.4, but the design experience is not as extensive as that of the Darrieus wind turbine. Further discussions are still needed on the optimal power coefficient and tip speed ratio of the Darrieus water turbine. The research with a power coefficient ranging from about zero to above the Betz limit needs further summarization. Various optimization strategies, such as multi-turbine arrangement, coupling with Savonius turbines, and blade pitching, are also discussed. By offering insights into the current state of optimization works for Darrieus water turbines, this review aims to facilitate future research, bridge existing gaps in the field, further enrich the utilization of ocean currents, and improve the structure of renewable energy.

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“…More recently, Clary et al [17] developed an adaptive model for Vertical Axis Tidal Turbine (VATT) to be applied to turbine arrays. Cartesian forces are extracted from an Unsteady Reynolds Averaged Navier-Stokes (URANS) simulation and then injected in an Actuator Force model, where they are adjusted with the local velocity.…”

Section: Introductionmentioning

confidence: 99%

Study of a Bi-Vertical Axis Turbines Farm Using the Actuator Cylinder Method

Jégo

Guillou

2021

Energies

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Vertical axis turbines, which extract kinetic energy from currents, can produce electricity independently from a current’s direction. Hence, this type of turbines raises interest for harvesting energy from tidal currents, where flow changes direction during flood and ebb tides, and where currents present large variation of direction during tide. Methods for representing vertical axis turbines in tidal farms should be implemented in order to predict correctly power production with an acceptable time cost. The Actuator Cylinder (AC) is one of them. Numerical results in terms of wakes, with the study of velocity profiles, and efforts are compared to experiences, as well as showed that the method is sufficiently accurate and for a reasonable computing time, which is of prime importance for tidal turbines farms studies. The Actuator Cylinder method is implemented in ANSYS Fluent in a 2D stationary resolution. The method is then applied to a double levels of two counter-rotating rotors marine turbine designed by Hydroquest. Wake and power production of a single turbine and several farm configurations are studied under different current conditions (magnitude and direction).

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An optimally-controlled RANS Actuator force model for efficient computations of tidal turbine arrays

Cited by 18 publications

References 26 publications

Numerical Analysis of Wake Interaction of Darrieus Tidal Turbine in Shallow Water Application

Numerical Analysis of Wake Interaction of Darrieus Tidal Turbine in Shallow Water Application

A Review: Design and Optimization Approaches of the Darrieus Water Turbine

Study of a Bi-Vertical Axis Turbines Farm Using the Actuator Cylinder Method

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