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Thermal and hydraulic phenomena in boundary layer of minijets impingement on curved surfaces

Abstract

Presented work considers flow and thermal phenomena occurring during the single minijet impingement on curved surfaces, heated with a constant heat flux, as well as the array of minijets. Numerical analyses, based on the mass, momentum and energy conservation laws, were conducted, regarding single phase and two-phase simulations. Focus was placed on the proper model construction, in which turbulence and boundary layer modeling was crucial. Calculations were done for various inlet parameters. Initial single minijet results served as the basis for the main calculations, which were conducted for two jet arrays, with flat and curved heated surfaces. Such complex geometries came from the cooling systems of electrical devices, and the geometry of cylindrical heat exchanger. The results, regarding Nusselt number, heated surface temperature, turbulence kinetic energy, production of entropy and vorticity, were presented and discussed. For assumed geometrical parameters similar results were obtained.

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Category:
Articles
Type:
artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
Published in:
Archives of Thermodynamics no. 39, edition 1, pages 147 - 166,
ISSN: 1231-0956
Language:
English
Publication year:
2018
Bibliographic description:
Kura T., Fornalik-Wajs E., Wajs J.: Thermal and hydraulic phenomena in boundary layer of minijets impingement on curved surfaces// Archives of Thermodynamics. -Vol. 39., iss. 1 (2018), s.147-166
DOI:
Digital Object Identifier (open in new tab) 10.1515/aoter-2018-0008
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Gdańsk University of Technology

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