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Numerical Study of the Winter–Kennedy Flow Measurement Method in Transient Flows

Author

Listed:
  • Binaya Baidar

    (Division of Fluid and Experimental Mechanics, Luleå University of Technology, SE-97187 Luleå, Sweden)

  • Jonathan Nicolle

    (Institut de recherche d’Hydro-Québec (IREQ), Varennes, QC J3X 1S1, Canada)

  • Bhupendra K. Gandhi

    (Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India)

  • Michel J. Cervantes

    (Division of Fluid and Experimental Mechanics, Luleå University of Technology, SE-97187 Luleå, Sweden)

Abstract

This paper explores the possibility of using the Winter–Kennedy (WK) method for transient flow rate measurement in hydraulic turbines. Computational fluid dynamic (CFD) analysis of a numerical model of an axial turbine was carried out for accelerating and decelerating flows. Those were obtained by linearly opening and closing of the guide vanes, respectively, while retaining the inlet pressure constant during the simulations. The behavior of several WK configurations on a cross-sectional plane and along the azimuthal direction of the spiral casing was studied during the transients. The study showed that there are certain WK configurations that are more stable than others. The physical mechanism behind the stability (or instability) of the WK method during transients is presented. Using the steady WK coefficient obtained at the best efficiency point (BEP), the WK method could estimate the transient flow rate with a deviation of about 7.5% and 3.5%, for accelerating and decelerating flow, respectively.

Suggested Citation

  • Binaya Baidar & Jonathan Nicolle & Bhupendra K. Gandhi & Michel J. Cervantes, 2020. "Numerical Study of the Winter–Kennedy Flow Measurement Method in Transient Flows," Energies, MDPI, vol. 13(6), pages 1-22, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:6:p:1310-:d:331367
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    References listed on IDEAS

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    1. Huixiang Chen & Daqing Zhou & Yuan Zheng & Shengwen Jiang & An Yu & You Guo, 2018. "Load Rejection Transient Process Simulation of a Kaplan Turbine Model by Co-Adjusting Guide Vanes and Runner Blades," Energies, MDPI, vol. 11(12), pages 1-18, November.
    2. Iliev, Igor & Trivedi, Chirag & Dahlhaug, Ole Gunnar, 2019. "Variable-speed operation of Francis turbines: A review of the perspectives and challenges," Renewable and Sustainable Energy Reviews, Elsevier, vol. 103(C), pages 109-121.
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