Numerical Simulation of Heat Transfer Enhancement in the Paths of Propulsion Systems with Single-Row Spherical and Oval Dimples on the Wall

Sergey Isaev, Dmitry Nikushchenko, Alexandr Sudakov, Nikita Tryaskin (), Leonid Iunakov, Alexandr Usachov and Valery Kharchenko
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Sergey Isaev: Research Department, Saint-Petersburg State Marine Technical University, Lotsmanskaya Str., 3, 190121 Saint-Petersburg, Russia
Dmitry Nikushchenko: Research Department, Saint-Petersburg State Marine Technical University, Lotsmanskaya Str., 3, 190121 Saint-Petersburg, Russia
Alexandr Sudakov: Research Department, Saint-Petersburg State University of Civil Aviation, Pilots Str. 38, 196210 Saint-Petersburg, Russia
Nikita Tryaskin: Research Department, Saint-Petersburg State Marine Technical University, Lotsmanskaya Str., 3, 190121 Saint-Petersburg, Russia
Leonid Iunakov: Research Department, Baltic State Technical University, 1-a Krasnoarmejskaya Str., 1, 190005 Saint-Petersburg, Russia
Alexandr Usachov: Research Department, N.E. Zhukovskii Central Aerohydrodynamic Institute, Radio Str., 17, 107005 Moscow, Russia
Valery Kharchenko: Research Department, Saint-Petersburg State University of Civil Aviation, Pilots Str. 38, 196210 Saint-Petersburg, Russia

Energies, 2022, vol. 15, issue 19, 1-17

Abstract: Modeling the vortex intensification of turbulent heat transfer in narrow engine ducts using single-row dimples was carried out within the framework of multi-block computing technologies implemented in a special VP2/3 package. The cases of a rectangular section with the placement of vortex generators—single-row packages of oval and spherical dimples on the initial hydrodynamic section and the section of the stabilized flow are excluded. The connection between the generated vortex structures and the predominant increase in heat transfer compared to the increase in hydraulic losses for various dimple layouts has been established: zigzag, ladder, and centers shifted and in a longitudinal-transverse order. The superiority in heat removal from the thickness with inclined oval dimples is shown—1.23 times compared to spherical ones with a decay in hydraulic resistance by 1.16 times.

Keywords: jet-vortex generation; heat transfer; spherical and oval dimples; channel; simulation; URANS (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
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