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Parametric Study on Thermo-Hydraulic Performance of NACA Airfoil Fin PCHEs Channels

Author

Listed:
  • Wei Wang

    (School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Liang Ding

    (School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Fangming Han

    (Aerospace Haiying (Harbin) Titanium Co., Ltd., Harbin 150001, China)

  • Yong Shuai

    (School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Bingxi Li

    (School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Bengt Sunden

    (Department of Energy Sciences, Lund University, SE 22100 Lund, Sweden)

Abstract

In this work, a discontinuous airfoil fin printed circuit heat exchanger (PCHE) was used as a recuperator in a micro gas turbine system. The effects of the airfoil fin geometry parameters (arc height, maximum arc height position, and airfoil thickness) and the airfoil fin arrangements (horizontal and vertical spacings) on the PCHE channel’s thermo-hydraulic performance were extensively examined by a numerical parametric study. The flow features, local heat transfer coefficient, and wall shear stress were examined in detail to obtain an enhanced heat transfer mechanism for a better PCHE design. The results show that the heat transfer and flow resistance were mainly increased at the airfoil leading edge owing to a flow jet, whereas the airfoil trailing edge had little effect on the thermo-hydraulic performance. The airfoil thickness was the most significant while the arc height and the vertical spacing were moderately significant to the performance. Moreover, only the airfoil thickness had a significant effect on the PCHE compactness. Based on a comprehensive investigation, two solutions NACA-6230 and -3220 were selected owing to their better thermal performance and smaller pressure drop, respectively, with horizontal spacings of 2 mm and vertical spacings of 2 or 3 mm.

Suggested Citation

  • Wei Wang & Liang Ding & Fangming Han & Yong Shuai & Bingxi Li & Bengt Sunden, 2022. "Parametric Study on Thermo-Hydraulic Performance of NACA Airfoil Fin PCHEs Channels," Energies, MDPI, vol. 15(14), pages 1-15, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:14:p:5095-:d:861251
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    References listed on IDEAS

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