Aero-acoustics prediction of a vertical axis wind turbine using Large Eddy Simulation and acoustic analogy

Ghasemian, Masoud; Nejat, Amir

doi:10.1016/j.energy.2015.05.098

Cited by 77 publications

(33 citation statements)

References 18 publications

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“…Assume that air is incompressible; the heat transfer between the air and the wall/blade is neglected and then physical parameters are constant; the effects of gravity and wall roughness are ignored [2,20,23,38]. The iteration steps are set to be 3000.…”

Section: Methodsmentioning

confidence: 99%

Prediction of Performance of a Variable-Pitch Axial Fan with Forward-Skewed Blades

Ye¹,

Fan²,

Zhang³

et al. 2019

Energies

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For a single-stage variable-pitch axial fan, the aerodynamic performance and through flow with and without blade skewing are examined numerically. Simulated results show that the total pressure rise and efficiency increase by 2.99% and 0.16%, respectively, with the best forward-skewed angle of θ = 3° at the design conditions. At the blade pitch angles of β = 29° and 35°, the total pressure rises and efficiency of the fan with θ = 3.0° under the highest efficiency point change by −0.55%, −0.53% and 1.39%, 2.11%, respectively. At design and off-design conditions, the forward-skewed blades mitigate tip leakage and delay the emergence of separation flow at the blade root, these benefits are higher at the higher blade pitch angle. The θ = 3.0° forward skew effectively raises the stage performance of the impeller and guide vanes.

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Section: Methodsmentioning

confidence: 99%

Prediction of Performance of a Variable-Pitch Axial Fan with Forward-Skewed Blades

Ye¹,

Fan²,

Zhang³

et al. 2019

Energies

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show abstract

“…The VAWT noise studies based on 2D CFD setups were presented in [16,17], the latter including experimental validation using a small VAWT at very low TSR. In [18], noise predictions using a semi-three-dimensional large-eddy simulation were performed, and [19] used an unsteady three-dimensional (3D) inviscid panel method to predict parts of the noise spectrum.…”

Section: Vawt Noise Predictionmentioning

confidence: 99%

Location of aerodynamic noise sources from a 200 kW vertical-axis wind turbine

Ottermo

Möllerström

Nordborg³

et al. 2017

Journal of Sound and Vibration

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“…All four available solvers have been implemented: SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) (Mohamed, 2012), SIMPLEC (Semi-Implicit Method for Pressure-Linked Equations-Consistent) (Lam and Peng, 2016), PISO (Pressure-Implicit with Splitting of Operators) (Ghasemian and Nejat, 2015) and COUPLED (pressure-velocity coupling method), (Balduzzi et al, 2016) which is used in this research.…”

Section: Cfd Modelling Considerationsmentioning

confidence: 99%

A CFD investigation of a variable-pitch vertical axis hydrokinetic turbine with incorporated flow acceleration

Mannion

McCormack

Leen

2019

J. Ocean Eng. Mar. Energy

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This paper presents the numerical modelling of a novel vertical axis tidal turbine that incorporates localised flow acceleration and variable-pitch blades. The focus is to develop a computational fluid dynamics model of a 1:20 scale model of the device using ANSYS® Fluent®. A nested sliding mesh technique is presented, using an outer sliding mesh to model the turbine and additional inner sliding meshes used for each of the six blades. The turbine sliding mesh is embedded in an outer static domain which includes the flow accelerating bluff body. Modelled power performance and velocity data are compared with experimental results obtained from scale model tests in a recirculating flume. The predicted power curves show general agreement with the measured data; the relative difference in maximum performance coefficient for example, is just 5.7 %. The model also accurately reproduces measured flows downstream of the turbine. The verified and experimentally validated model is subsequently used to investigate the effects of the variable-pitching and number of blades on device performance.

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Aero-acoustics prediction of a vertical axis wind turbine using Large Eddy Simulation and acoustic analogy

Cited by 77 publications

References 18 publications

Prediction of Performance of a Variable-Pitch Axial Fan with Forward-Skewed Blades

Prediction of Performance of a Variable-Pitch Axial Fan with Forward-Skewed Blades

Location of aerodynamic noise sources from a 200 kW vertical-axis wind turbine

A CFD investigation of a variable-pitch vertical axis hydrokinetic turbine with incorporated flow acceleration

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