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Effect of Transitional Turbulence Modelling on a Straight Blade Vertical Axis Wind Turbine

Chapter
Part of the Advanced Structured Materials book series (STRUCTMAT, volume 34)

Abstract

The flow around straight blade vertical axis wind turbines is typically complex at low tip speed ratios (TSR < 2). In this paper, the turbulence models which are based on the assumption of fully developed turbulent flow, such as S-A, RNG κ-ε and SST κ-ω have been investigated in comparison to the SST transitional model (both with and without curvature correction) to account for the laminar-turbulence transition. The investigation is based on the 2D unsteady Reynolds averaged Navier–Stokes (URANS) equations using a sliding mesh technique. It has been found that applying turbulence models based on the assumption of fully developed flow shows significant differences in velocity magnitude if the flow is under stall condition or wake effect compared to the transitional model. Also, the predicted flow structure in the vicinity of the stalled airfoils using different types of turbulence models is found to be different compared to the un-stalled airfoils where no significant differences in the flow field have been observed. In the wake region, the flow varies less significantly compared to the stalled airfoils.

Keywords

Wind Turbine Azimuthal Angle Curvature Correction Stream Line Shear Stress Transport 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

Khaled M. Almohammadi would like to express his gratitude to Taibah University, Kingdom of Saudi Arabia for supporting him to perform his PhD study in the University of Leeds.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.CFD Centre, ETII, Faculty of EngineeringUniversity of LeedsLeedsUK
  2. 2.Mechanical Engineering, Taibah UniversityMadinahSaudi Arabia
  3. 3.CFD Centre, ETII, Faculty of EngineeringUniversity of LeedsLeedsUK

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