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Experimental Study and Conjugate Heat Transfer Simulation of Turbulent Flow in a 90° Curved Square Pipe

Author

Listed:
  • Guanming Guo

    (Graduate School of Engineering, Hiroshima University, Hiroshima 7390046, Japan)

  • Masaya Kamigaki

    (Graduate School of Engineering, Hiroshima University, Hiroshima 7390046, Japan)

  • Qiwei Zhang

    (Graduate School of Engineering, Hiroshima University, Hiroshima 7390046, Japan
    School of Mechanical Engineering, Yanshan University, Qinhuangdao 066000, China)

  • Yuuya Inoue

    (Graduate School of Engineering, Hiroshima University, Hiroshima 7390046, Japan)

  • Keiya Nishida

    (Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima 7390046, Japan)

  • Hitoshi Hongou

    (Mazda Motor Corporation, Hiroshima 7308670, Japan)

  • Masanobu Koutoku

    (Mazda Motor Corporation, Hiroshima 7308670, Japan)

  • Ryo Yamamoto

    (Mazda Motor Corporation, Hiroshima 7308670, Japan)

  • Hieaki Yokohata

    (Mazda Motor Corporation, Hiroshima 7308670, Japan)

  • Shinji Sumi

    (Mazda Motor Corporation, Hiroshima 7308670, Japan)

  • Yoichi Ogata

    (Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima 7390046, Japan)

Abstract

This paper discusses the turbulent flow and heat transfer from a uniform air flow with high temperature to the outside through a 90° curved square pipe. Both conjugate heat transfer (CHT) simulation and experiments of temperature field measurements at cross sections of the pipe are performed. A straight pipe is investigated and compared with the 90° curved pipe. The temperature of the air flow at the inlet of the pipe is set at 402 K, and the corresponding Reynolds number is approximately 6 × 10 4 . To obtain the spatial average temperature at each cross section, the temperature fields are measured along the streamwise of the pipes and in the circumferential direction using thermocouples at each cross section from the inlet to the outlet of both the straight and curved pipes. Furthermore, the simulation is performed for turbulent flow and heat transfer inside the pipe wall using the Re-normalization group (RNG) k-ε turbulence model and CHT method. Both the experimental and numerical results show that the curvature of the pipe result in a deviation and impingement in the high-temperature core and a separation between the wall and air, resulting in a secondary flow pattern of the temperature distribution.

Suggested Citation

  • Guanming Guo & Masaya Kamigaki & Qiwei Zhang & Yuuya Inoue & Keiya Nishida & Hitoshi Hongou & Masanobu Koutoku & Ryo Yamamoto & Hieaki Yokohata & Shinji Sumi & Yoichi Ogata, 2020. "Experimental Study and Conjugate Heat Transfer Simulation of Turbulent Flow in a 90° Curved Square Pipe," Energies, MDPI, vol. 14(1), pages 1-21, December.
    • Handle: RePEc:gam:jeners:v:14:y:2020:i:1:p:94-:d:468772
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    References listed on IDEAS

    as
    1. Yan Wang & Quanlin Dong & Pengfei Wang, 2015. "Numerical Investigation on Fluid Flow in a 90-Degree Curved Pipe with Large Curvature Ratio," Mathematical Problems in Engineering, Hindawi, vol. 2015, pages 1-12, August.
    2. Naphon, Paisarn & Wongwises, Somchai, 2006. "A review of flow and heat transfer characteristics in curved tubes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 10(5), pages 463-490, October.
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