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Study of the Incidence Angle Effect on a Savonius Wind Rotor Aerodynamic Structure

  • Sobhi FrikhaEmail author
  • Zied Driss
  • Hedi Kchaou
  • Mohamed Salah Abid
Chapter

Abstract

This study aimed to investigate the effect of the incidence angle on the aerodynamic characteristics of the flow around a Savonius wind rotor. Six configurations with different incidence angles θ = 0°, θ = 30°, θ = 60°, θ = 90°, θ = 120°, and θ = 150° were studied. To this end, we have developed a numerical simulation using the computational fluid dynamic (CFD) code “Fluent.” The considered numerical model is based on the resolution of the Navier–Stokes equations together with the k–ε turbulence model. These equations were solved by a finite volume discretization method. Particularly, we were interested in visualizing the velocity field, the mean velocity, the static pressure, the dynamic pressure, the turbulent kinetic energy, the dissipation rate of the turbulent kinetic energy, and the turbulent viscosity. Our results confirm that the variation of the incidence angle has an effect on the local characteristics. Our numerical results were compared with those obtained by previous findings. The comparison showed a good agreement and confirmed the efficiency of our numerical method.

Keywords

Savonius rotor Turbulent flow Incidence angle CFD 

Nomenclature

Cp

Coefficient of the power, dimensionless

C

Constant of the k–ε turbulence model, dimensionless

C

Constant of the k–ε turbulence model, dimensionless

Cμ

Constant of the k–ε turbulence model, dimensionless

CMs

Static torque coefficient

d

Rotor diameter, m

e

Bucket thickness, m

Fi

Force components, N

Gk

Production term of turbulence, kg m−1 s−3

k

Turbulent kinetic energy, J kg−1

Ms

Static torque

P

Pressure, Pa

ui

Velocity components, m s−1

ui

Fluctuating velocity components, m s−1

ε

Dissipation rate of the turbulent kinetic energy, W kg−1

μ

Dynamic viscosity, Pa s

μt

Turbulent viscosity, Pa s

ρ

Density, kg m−3

σk

Constant of the k–ε turbulence model

σε

Constant of the k–ε turbulence model

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  • Sobhi Frikha
    • 1
    Email author
  • Zied Driss
    • 1
  • Hedi Kchaou
    • 1
  • Mohamed Salah Abid
    • 1
  1. 1.Laboratory of Electro-Mechanic Systems (LASEM), National School of Engineers of Sfax (ENIS)University of SfaxSfaxTunisia

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