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Local Heat Transfer Dynamics in the In-Line Tube Bundle under Asymmetrical Pulsating Flow

Author

Listed:
  • Aigul Haibullina

    (Institute of Heart Power Engineering, Kazan State Power Engineering University, 51 Krasnoselskaya Street, 420066 Kazan, Russia)

  • Aidar Khairullin

    (Institute of Heart Power Engineering, Kazan State Power Engineering University, 51 Krasnoselskaya Street, 420066 Kazan, Russia)

  • Denis Balzamov

    (Institute of Heart Power Engineering, Kazan State Power Engineering University, 51 Krasnoselskaya Street, 420066 Kazan, Russia)

  • Vladimir Ilyin

    (Institute of Heart Power Engineering, Kazan State Power Engineering University, 51 Krasnoselskaya Street, 420066 Kazan, Russia)

  • Veronika Bronskaya

    (Mechanical Faculty, Kazan National Research Technological University, 68 Karl Marx Street, 420015 Kazan, Russia
    Engineering Institute of Computer Mathematics and Information Technologies, Kazan Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia)

  • Liliya Khairullina

    (Engineering Institute of Computer Mathematics and Information Technologies, Kazan Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia)

Abstract

The pulsating flow is one of the techniques that can enhance heat transfer, therefore leading to energy saving in tubular heat exchangers. This paper investigated the heat transfer and flow characteristics in a two-dimensional in-line tube bundle with the pulsating flow by a numerical method using the Ansys Fluent. Numerical simulation was performed for the Reynolds number Re = 500 with different frequencies and amplitude of pulsation. Heat transfer enhancement was estimated from the central tube of the tube bundle. Pulsation velocity had an asymmetrical character with a reciprocating flow. The technique developed by the authors to obtain asymmetric pulsations was used. This technique allows simulating an asymmetric flow in heat exchangers equipped with a pulsation generation system. Increase in both the amplitude and the frequency of the pulsations had a significant effect on the heat transfer enhancement. Heat transfer enhancement is mainly observed in the front and back of the cylinder. At a steady flow in these areas, heat transfer is minimal due to the weak circulation of the flow. The increase in heat transfer in the front and back of the cylinder is associated with increased velocity and additional flow mixing in these areas. The maximum increase in the Nusselt number averaged over space and time in the entire studied range was 106%, at a pulsation frequency of 0.5 Hz and pulsation amplitude of 4.5. A minimum enhancement of 25% was observed at a frequency of 0.166 Hz and amplitude of 1.25.

Suggested Citation

  • Aigul Haibullina & Aidar Khairullin & Denis Balzamov & Vladimir Ilyin & Veronika Bronskaya & Liliya Khairullina, 2022. "Local Heat Transfer Dynamics in the In-Line Tube Bundle under Asymmetrical Pulsating Flow," Energies, MDPI, vol. 15(15), pages 1-24, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:15:p:5571-:d:877210
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    Citations

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    Cited by:

    1. Khalifa Aliyu Ibrahim & Patrick Luk & Zhenhua Luo, 2023. "Cooling of Concentrated Photovoltaic Cells—A Review and the Perspective of Pulsating Flow Cooling," Energies, MDPI, vol. 16(6), pages 1-23, March.
    2. Aidar Khairullin & Aigul Haibullina & Alex Sinyavin & Denis Balzamov & Vladimir Ilyin & Liliya Khairullina & Veronika Bronskaya, 2022. "Heat Transfer in 3D Laguerre–Voronoi Open-Cell Foams under Pulsating Flow," Energies, MDPI, vol. 15(22), pages 1-26, November.

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