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THERMAL BOUNDARY EFFECT ON THE HEAT TRANSFER PERFORMANCE OF A RIBBED COOLING CHANNEL WITH INTERSECTING RIBS

THERMAL BOUNDARY EFFECT ON THE HEAT TRANSFER PERFORMANCE OF A RIBBED COOLING CHANNEL WITH... The current study focuses on the influence of thermal boundary conditions, especially for a ribbed cooling channel with two intersecting ribs. Numerical studies are carried out for the Reynolds number of 30000 under two kinds of thermal boundary conditions, i.e., the constant wall temperature condition and the uniform heat flux condition. The local normalized Nusselt number distributions and area-averaged values are compared and further analyzed. The thermal boundary type and value both affect the heat transfer performance. The uniform heat flux condition always yields higher heat transfer than the constant wall temperature condition. A correlation for the wall-to-coolant temperature ratio is obtained and compared with previously published correlations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Mechanics and Technical Physics Springer Journals

THERMAL BOUNDARY EFFECT ON THE HEAT TRANSFER PERFORMANCE OF A RIBBED COOLING CHANNEL WITH INTERSECTING RIBS

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Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Ltd. 2023
ISSN
0021-8944
eISSN
1573-8620
DOI
10.1134/s0021894422060074
Publisher site
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Abstract

The current study focuses on the influence of thermal boundary conditions, especially for a ribbed cooling channel with two intersecting ribs. Numerical studies are carried out for the Reynolds number of 30000 under two kinds of thermal boundary conditions, i.e., the constant wall temperature condition and the uniform heat flux condition. The local normalized Nusselt number distributions and area-averaged values are compared and further analyzed. The thermal boundary type and value both affect the heat transfer performance. The uniform heat flux condition always yields higher heat transfer than the constant wall temperature condition. A correlation for the wall-to-coolant temperature ratio is obtained and compared with previously published correlations.

Journal

Journal of Applied Mechanics and Technical Physics – Springer Journals

Published: Dec 1, 2022

Keywords: turbine cooling blade; intersecting rib; thermal boundary condition; heat transfer efficiency

References

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