A modified implementation of actuator line method for simulating ducted tidal turbines

Baratchi, F.; Jeans, Tiger L.; Gerber, A. G.

doi:10.1016/j.oceaneng.2019.106586

Cited by 11 publications

(6 citation statements)

References 27 publications

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“…An underdeveloped area of ALM simulations is its use in the vicinity of solid walls as would be the case for simulating wings equipped with detached end-plates or ducted rotor fans. Baratchi et al (2019) used a modified ALM to simulate the ducted tidal turbine of Cresswell et al (2015) and obtained satisfying results within the accuracy of the method. This former study used a cylindrical projection of the isotropic Gaussian kernel to respect the geometrical limits of the duct and used point sampling with linear interpolation to compute the effective freestream velocity vector.…”

Section: Introductionmentioning

confidence: 94%

On the simulation of a wing with detached end-plates using an actuator line based on an anisotropic Gaussian kernel

Breault,

Rochefort,

Dumas

2024

Trans. Can. Soc. Mech. Eng.

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The results of an actuator line method (ALM) using an anisotropic Gaussian kernel for both, velocity sampling and force projection, are compared to the wall-resolved results of a NACA 0015 rectangular wing at an angle of attack of 10°. The rectangular wing is simulated both, with and without, detached end-plates to show that the ALM is capable of accounting for the presence of a narrow gap of 0.01 c between the tip of the wing and the end-plate. The anisotropic kernel shape is varied in the chordwise, thickness-wise, and spanwise directions for different grid sizes and number of actuating points. The body forces are truncated and regularized to enforce proper spacing between the actuating line and the end-plate. ALM and wall-resolved results are compared on the basis of the integrated lift and drag coefficients, the sectional lift and drag coefficients, as well as the tip vortex core size, position, and circulation. Recommendations are made regarding the optimal kernel shape for a given number of actuating points and mesh resolution.

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Section: Introductionmentioning

confidence: 94%

On the simulation of a wing with detached end-plates using an actuator line based on an anisotropic Gaussian kernel

Breault,

Rochefort,

Dumas

2024

Trans. Can. Soc. Mech. Eng.

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“…Another cloud-compatible platform for modeling and simulation of porous media is Open Porous Media (OPM) project which was founded in 2009 and ever since has been gradually enriched with several side packages for adding extra physics to the porous media flow and deformation problems (Rasmussen et al, 2021). In 2013, Gerber et al (2013) released EXN/Aero software package which is now hosted in Google Cloud for high performance computing on CPUs and GPUs for simulation of computational fluid dynamics (Baratchi et al, 2019). This commercial software, was originally developed for ocean flow modeling, but now has been used for porous material flow as well (Baratchi et al, 2017).…”

Section: Cloud Storage and Analysismentioning

confidence: 99%

“…In 2013, Gerber et al. (2013) released EXN/Aero software package which is now hosted in Google Cloud for high performance computing on CPUs and GPUs for simulation of computational fluid dynamics (Baratchi et al., 2019). This commercial software, was originally developed for ocean flow modeling, but now has been used for porous material flow as well (Baratchi et al., 2017).…”

Section: Big Datamentioning

confidence: 99%

Review of Data Science Trends and Issues in Porous Media Research With a Focus on Image‐Based Techniques

Rabbani

Fernando

Shams

et al. 2021

Water Resources Research

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“…The results showed that the model calculation results were accurate and consistent with the LES prediction results. F. Baratchi et al [10] applied a grid-based distribution of the blade elements and used the local chord length as the length scale for the projection factor to modify the standard ALM. Following this, they then studied the influence of the turbulence model on the prediction of the actuator line method.…”

Section: Introductionmentioning

confidence: 99%

Research on the Power Capture and Wake Characteristics of a Wind Turbine Based on a Modified Actuator Line Model

Xue

Duan²,

et al. 2022

Energies

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On a wind farm, the wake has an important impact on the performance of the wind turbines. For example, the wake of an upstream wind turbine affects the blade load and output power of the downstream wind turbine. In this paper, a modified actuator line model with blade tips, root loss, and an airfoil three-dimensional delayed stall was revised. This full-scale modified actuator line model with blades, nacelles, and towers, was combined with a Large Eddy Simulation, and then applied and validated based on an analysis of wind turbine wakes in wind farms. The modified actuator line model was verified using an experimental wind turbine. Subsequently, numerical simulations were conducted on two NREL 5 MW wind turbines with different staggered spacing to study the effect of the staggered spacing on the characteristics of wind turbines. The results show that the output power of the upstream turbine stabilized at 5.9 MW, and the output power of the downstream turbine increased. When the staggered spacing is R and 1.5R, both the power and thrust of the downstream turbine are severely reduced. However, the length of the peaks was significantly longer, which resulted in a long-term unstable power output. As the staggered spacing increased, the velocity in the central near wake of the downstream turbine also increased, and the recovery speed at the threshold of the wake slowed down. The modified actuator line model described herein can be used for the numerical simulation of wakes in wind farms.

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A modified implementation of actuator line method for simulating ducted tidal turbines

Cited by 11 publications

References 27 publications

On the simulation of a wing with detached end-plates using an actuator line based on an anisotropic Gaussian kernel

On the simulation of a wing with detached end-plates using an actuator line based on an anisotropic Gaussian kernel

Review of Data Science Trends and Issues in Porous Media Research With a Focus on Image‐Based Techniques

Research on the Power Capture and Wake Characteristics of a Wind Turbine Based on a Modified Actuator Line Model

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