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CFD Simulation of Co-Planar Multi-Rotor Wind Turbine Aerodynamic Performance Based on ALM Method

Author

Listed:
  • Yuan Zhang

    (College of Mechanics and Materials, Hohai University, No.8 West Focheng Road, Nanjing 210098, China)

  • Xin Cai

    (College of Mechanics and Materials, Hohai University, No.8 West Focheng Road, Nanjing 210098, China
    Cooperate Innovation Center for Coastal Development and Protection, No.1, Xikang Road, Nanjing 210098, China
    Wind Turbine Structural Engineering Research Center of Jiangsu Province, Nanjing 211100, China)

  • Shifa Lin

    (College of Mechanics and Materials, Hohai University, No.8 West Focheng Road, Nanjing 210098, China)

  • Yazhou Wang

    (College of Mechanics and Materials, Hohai University, No.8 West Focheng Road, Nanjing 210098, China
    Wind Turbine Structural Engineering Research Center of Jiangsu Province, Nanjing 211100, China)

  • Xingwen Guo

    (College of Mechanics and Materials, Hohai University, No.8 West Focheng Road, Nanjing 210098, China
    Cooperate Innovation Center for Coastal Development and Protection, No.1, Xikang Road, Nanjing 210098, China
    Wind Turbine Structural Engineering Research Center of Jiangsu Province, Nanjing 211100, China)

Abstract

Considering requirements such as enhanced unit capacity, the geometric size of wind turbine blades has been increasing; this, in turn, results in a rapid increase in manufacturing costs. To this end, in this paper, we examine the aerodynamics of co-planar multi-rotor wind turbines to achieve higher unit capacity at a lower blade length. The multiple wind rotors are in the same plane with no overlaps. The ALM-LES method is used to investigate the interaction effect of the blade tip vortices, by revealing the regulation of aerodynamic performance and flow field characteristics of the multi-rotor wind turbines. The simulated results suggest an observable reduction in the blade tip vortices generated by blades located closely together, due to the breaking and absorption of the blade tip vortices by the two rotors. This results in increased aerodynamic performance and loads on the multi-rotor wind turbine. The influence between the blade tip vortex is mainly located in the range of 0.2 R from the blade tip, with this range leading to a significant increase in the lift coefficient. Thus, when the wind rotor spacing is 0.2 R, the interaction between the blade tip vortices is low.

Suggested Citation

  • Yuan Zhang & Xin Cai & Shifa Lin & Yazhou Wang & Xingwen Guo, 2022. "CFD Simulation of Co-Planar Multi-Rotor Wind Turbine Aerodynamic Performance Based on ALM Method," Energies, MDPI, vol. 15(17), pages 1-13, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:17:p:6422-:d:905105
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    References listed on IDEAS

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