Aerodynamic Analysis of a Two-Bladed Vertical-Axis Wind Turbine Using a Coupled Unsteady RANS and Actuator Line Model

Ruiwen Zhao, Angus C. W. Creech, Alistair G. L. Borthwick, Vengatesan Venugopal and Takafumi Nishino
Additional contact information
Ruiwen Zhao: Institute for Energy Systems, School of Engineering, The University of Edinburgh, King’s Buildings, Edinburgh EH9 3BF, UK
Angus C. W. Creech: Institute for Energy Systems, School of Engineering, The University of Edinburgh, King’s Buildings, Edinburgh EH9 3BF, UK
Alistair G. L. Borthwick: Institute for Energy Systems, School of Engineering, The University of Edinburgh, King’s Buildings, Edinburgh EH9 3BF, UK
Vengatesan Venugopal: Institute for Energy Systems, School of Engineering, The University of Edinburgh, King’s Buildings, Edinburgh EH9 3BF, UK
Takafumi Nishino: Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK

Energies, 2020, vol. 13, issue 4, 1-26

Abstract: Close-packed contra-rotating vertical-axis turbines have potential advantages in wind and hydrokinetic power generation. This paper describes the development of a numerical model of a vertical axis turbine with a torque-controlled system using an actuator line model (ALM). The developed model, coupled with the open-source OpenFOAM computational fluid dynamics (CFD) code, is used to examine the characteristics of turbulent flow behind a single two-bladed vertical-axis turbine (VAT). The flow field containing the turbine is simulated by solving the unsteady Reynolds-averaged Navier-Stokes (URANS) equations with a k - ω shear stress transport (SST) turbulence model. The numerical model is validated against experimental measurements from a two-bladed H-type wind turbine. Turbine loading is predicted, and the vorticity distribution is investigated in the vicinity of the turbine. Satisfactory overall agreement is obtained between numerical predictions and measured data on thrust coefficients. The model captures important three-dimensional flow features that contribute to wake recovery behind a vertical-axis turbine, which will be useful for future studies of close-packed rotors with a large number of blades.

Keywords: vertical-axis turbine; actuator line method; torque control; URANS; OpenFOAM; wind energy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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