Performance analysis of a h-darrieuswind turbine for a series of 4-digit NACA airfoils

Krzysztof Rogowski*, Martin Otto Laver Hansen, Galih Bangga

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The purpose of this paper is to estimate the H-Darrieus wind turbine aerodynamic performance, aerodynamic blade loads, and velocity profiles downstream behind the rotor. The wind turbine model is based on the rotor designed by McDonnell Aircraft Company. The model proposed here consists of three fixed straight blades; in the future, this model is planned to be developed with controlled blades. The study was conducted using the unsteady Reynolds averaged Navier-Stokes (URANS) approach with the k-ω shear stress transport (SST) turbulence model. The numerical two-dimensional model was verified using two other independent aerodynamic approaches: A vortex model and the extended version of the computational fluid dynamics (CFD) code FLOWer. All utilized numerical codes gave similar result of the instantaneous aerodynamic blade loads. In addition, steady-state calculations for the applied airfoils were also made using the same numerical model as for the vertical axis wind turbine (VAWT) to obtain lift and drag coefficients. The obtained values of lift and drag force coefficients, for a Reynolds number of 2.9 million, agree with the predictions of the experiment and XFOIL over a wide range of angle of attack. A maximum rotor power coefficient of 0.5 is obtained, which makes this impeller attractive from the point of view of further research. Research has shown that, if this rotor were to work with fixed blades, it is recommended to use the NACA 1418 airfoil instead of the original NACA 0018.
Original languageEnglish
Article number3196
JournalEnergies
Volume13
Issue number12
Number of pages28
ISSN1996-1073
DOIs
Publication statusPublished - 2020

Keywords

  • CFD
  • k-ω
  • VAWT
  • Airfoil characteristics
  • Aerodynamic wake

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