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

Aigul Haibullina, Aidar Khairullin, Denis Balzamov, Vladimir Ilyin, Veronika Bronskaya and Liliya Khairullina
Additional contact information
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
Liliya Khairullina: Engineering Institute of Computer Mathematics and Information Technologies, Kazan Federal University, 18 Kremlyovskaya Street, 420008 Kazan, Russia

Energies, 2022, vol. 15, issue 15, 1-24

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.

Keywords: asymmetric pulsating flow; in-line tube bundle; CFD; enhancement of heat transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/15/5571/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/15/5571/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:15:p:5571-:d:877210

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().