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Strongly Heated Turbulent Flow in a Channel with Pin Fins

Author

Listed:
  • Chien-Shing Lee

    (School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907, USA)

  • Tom I. -P. Shih

    (School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907, USA)

  • Kenneth Mark Bryden

    (Ames Laboratory, U.S. Department of Energy, Ames, IA 50010, USA)

  • Richard P. Dalton

    (National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WV 26507, USA)

  • Richard A. Dennis

    (National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WV 26507, USA)

Abstract

Large-eddy simulations (LES) were performed to study the turbulent flow in a channel of height H with a staggered array of pin fins with diameter D = H/2 as a function of heating loads that are relevant to the cooling of turbine blades and vanes. The following three heating loads were investigated—wall-to-coolant temperatures of T w /T c = 1.01, 2.0, and 4.0—where the Reynolds number at the channel inlet was 10,000 and the back pressure at the channel outlet was 1 bar. For the LES, two different subgrid-scale models—the dynamic kinetic energy model (DKEM) and the wall-adapting local eddy-viscosity model (WALE)—were examined and compared. This study was validated by comparing with data from direct numerical simulation and experimental measurements. The results obtained show high heating loads to create wall jets next to all heated surfaces that significantly alter the structure of the turbulent flow. Results generated on effects of heat loads on the mean and fluctuating components of velocity and temperature, turbulent kinetic energy, the anisotropy of the Reynolds stresses, and velocity-temperature correlations can be used to improve existing RANS models.

Suggested Citation

  • Chien-Shing Lee & Tom I. -P. Shih & Kenneth Mark Bryden & Richard P. Dalton & Richard A. Dennis, 2023. "Strongly Heated Turbulent Flow in a Channel with Pin Fins," Energies, MDPI, vol. 16(3), pages 1-21, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1215-:d:1044192
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    Citations

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    Cited by:

    1. Linqi Shui & Zhongkai Hu & Hang Song & Zhi Zhai & Jiatao Wang, 2023. "Study on Flow and Heat Transfer Characteristics and Anti-Clogging Performance of Tree-Like Branching Microchannels," Energies, MDPI, vol. 16(14), pages 1-22, July.
    2. Artur S. Bartosik, 2023. "Numerical Heat Transfer and Fluid Flow: New Advances," Energies, MDPI, vol. 16(14), pages 1-7, July.

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