THERMAL HYDRAULIC EFFICIENCY OF ONE AND TWO-ROW BUNCH OF CYLINDERS WITH A SPIRAL GROOVE ON THE OUTER SURFACE WITH TRANSVERSE FLOW


  • M.A. Mulyarchuk Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
  • A.A. Khalatov Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
  • G.V. Kovalenko Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
DOI: https://doi.org/10.31472/ttpe.2.2022.2

Abstract

The results of experimental study of thermohydraulic performance of a single- and double-row of bundle of round cylinders with screw groove on the external surface at the air cross-flow are presented. The analysis was performed at the Reynolds number range from 6800 to 12000. For a single-row bundle the Reynolds Analogy Factor is more than unity for all Reynolds numbers studied, while for the double-row of cylinders it is over the inity at ReD<10000. The high thermohydraulic performance is due to the formation of the «interwined vortex structures» in the back cylinder zone. The obtained results show that when using heat exchange surfaces with spiral grooves it is necessary to prefer a beam of cylinders with an asymmetric arrangement of grooves. If the positions of the cylinders with grooves on their surface are identical, vortices from adjacent cylinders may interfere with each other in small steps of their placement in the beam. This may be the reason for the advantage of heat transfer in cylindrical surfaces with one-west grooves over similar surfaces with two-west.

References

1. Zhukauskas A., Zhyugzhda I. Heat transfer of a cylinder in a transverse fluid flow.// Vilnius. "MOKSLAS" 1979. - 235 S.
2. Migay V.K., Firsova E.V. Heat exchange and hydraulic resistance of tube bundles. Leningrad. Publishinghouse "NAUKA" 1986.195 S.
3. Schlichting G. Theory of the boundary layer. Moscow. Publishinghouse "NAUKA" 1969. - 742 p.
4. Maneev A. P., Terekhov V. I. Aerodynamics and heat exchange of smoke pipes. "ScientificReview" http://russian-science.info.
5.Khalatov A.A., Kovalenko G.V., Muliarchuk M.A. Research of hydrodynamics and heat transfer during the transverse air flow of a row of cylinders with screw grooves // Eastern-European Journal of Enterprise Technologies, – 2020. – № 3/8. (105), С. 39 – 45.
6. Khalatov A.A., Donyk T.V. A new criterion of thermohydraulic performance of heat transfer intensifiers. Reports of the National Academy of Sciences of Ukraine, 2014.

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Published
2022-08-01
How to Cite
Mulyarchuk, M., Khalatov, A., & Kovalenko, G. (2022). THERMAL HYDRAULIC EFFICIENCY OF ONE AND TWO-ROW BUNCH OF CYLINDERS WITH A SPIRAL GROOVE ON THE OUTER SURFACE WITH TRANSVERSE FLOW. Thermophysics and Thermal Power Engineering, 44(2), 12-20. https://doi.org/https://doi.org/10.31472/ttpe.2.2022.2
Issue
Vol 44 No 2 (2022): Thermophysics and Thermal Power Engineering
Section
Articles
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