Numerical investigation of the behavior of hybrid wind turbine consisting of Bach type blades as internal rotor

Document Type : Original Article

Authors

Ph.D., Urmia University of Technology, Urmia, Iran

Abstract

In this article, a new type of hybrid vertical axis wind turbines is introduced and its aerodynamic behavior is evaluated with the help of Computational Fluid Dynamics. In the investigated rotor structure, Bach-type blades are used as the inner rotor. The flow in the computational domain is incompressible, unsteady and turbulent. Beyond that, SST k- turbulence method is used to model the Reynolds stress. The purpose of this research is to provide suitable performance conditions for the studied rotor. In this regard, the performance of the rotor and the power coefficient of the hybrid wind turbine in tip speed ratio (TSR) of 3.5, 2.5, and 1.5 and free wind speed (U) of 5 and 10 m/s and attachment angles(φ) of 0˚, 45˚ and 90˚ are investigated. The obtained results showed that with increasing TSR value, the velocity and vorticity field inside the rotor became weaker and stronger respectively and the area of the dead band expanded. In addition, the value of φ has a direct relationship with the power coefficient, in such a way that with the increasing of the value of φ, the power coefficient of the rotor has increased. On the other hand, the maximum power is produced in the conditions of TSR = 1.5, φ = 90˚ and U = 10 m/s and its value is 0.39.

Keywords

Smiley face

References

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Fluid Mechanics & Aerodynamics
Volume 13, Issue 1 - Serial Number 33
Spring and summer 2024
September 2024

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History

  • Receive Date: 07 May 2024
  • Revise Date: 18 June 2024
  • Accept Date: 06 July 2024
  • Publish Date: 22 July 2024

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