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Research on Aerodynamic Characteristics of Crescent Iced Conductor Based on S-A Finite Element Turbulence Model

Author

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  • Shaokai Liao

    (College of Engineering & Architecture, Jiaxing University, Jiaxing 314001, China
    College of Mechanics and Materials, Hohai University, Nanjing 211100, China)

  • Yan Zhang

    (College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China)

  • Xi Chen

    (College of Engineering & Architecture, Jiaxing University, Jiaxing 314001, China)

  • Pengcheng Cao

    (College of Architectural Engineering, Jiaxing Nanhu University, Jiaxing 314001, China)

Abstract

Galloping is a typical wind-induced phenomenon in iced conductors, which can have serious impacts on the safe and stable operation of power systems. The aerodynamic characteristics of an iced conductor are the key factor in the study of galloping, which can be determined mainly by the numerical simulation of flow past an iced conductor. Based on the Reynolds-averaged Navier-Stokes (RANS) equations closed by the Spalart-Allmaras (S-A) turbulence model, the third-order Runge-Kutta method along the uniform streamline and Galerkin method are used for temporal and spatial discretization, respectively. The convection and diffusion terms in the discretization scheme are treated semi-implicitly, and the finite element scheme based on the S-A turbulence model is presented and used to numerically simulate flow past a crescent iced conductor. We systematically investigate the effects of icing thickness, wind speed, and wind attack angle on aerodynamic coefficients and flow patterns. Based on the experimental results, the effectiveness of the present algorithm is verified. Using the streamline diagram and pressure distribution diagram of the crescent-shaped iced conductor, the mechanism for the sharp peak of the lift coefficient is explored. Combined with the galloping mechanism of Den Hartog and Nigol, the galloping instability zone of the crescent-shaped iced conductor is analyzed.

Suggested Citation

  • Shaokai Liao & Yan Zhang & Xi Chen & Pengcheng Cao, 2022. "Research on Aerodynamic Characteristics of Crescent Iced Conductor Based on S-A Finite Element Turbulence Model," Energies, MDPI, vol. 15(20), pages 1-16, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:20:p:7753-:d:948035
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    References listed on IDEAS

    as
    1. Maciej Szudarek & Adam Piechna & Piotr Prusiński & Leszek Rudniak, 2022. "CFD Study of High-Speed Train in Crosswinds for Large Yaw Angles with RANS-Based Turbulence Models including GEKO Tuning Approach," Energies, MDPI, vol. 15(18), pages 1-24, September.
    2. Francesco De Vanna & Danilo Bof & Ernesto Benini, 2022. "Multi-Objective RANS Aerodynamic Optimization of a Hypersonic Intake Ramp at Mach 5," Energies, MDPI, vol. 15(8), pages 1-27, April.
    3. Shantanu Purohit & Ijaz Fazil Syed Ahmed Kabir & E. Y. K. Ng, 2021. "On the Accuracy of uRANS and LES-Based CFD Modeling Approaches for Rotor and Wake Aerodynamics of the (New) MEXICO Wind Turbine Rotor Phase-III," Energies, MDPI, vol. 14(16), pages 1-26, August.
    4. Zhijin Zhang & Yi Zhang & Xingliang Jiang & Jianlin Hu & Qin Hu, 2018. "Icing Degree Characterization of Insulators Based on the Equivalent Collision Coefficient of Standard Rotating Conductors," Energies, MDPI, vol. 11(12), pages 1-14, November.
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