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Fluid Flow and Heat Transfer in Duct Fan Flows with Top-Wall Rectangular-Wing Turbulators

Published online by Cambridge University Press:  05 May 2011

T. Y. Chen  and
Y. H. Chen
T. Y. Chen*
Affiliation:
Department of Aerospace Engineering, Tamkang University, Taipei, Taiwan 25137, R.O.C.
Y. H. Chen*
Affiliation:
Department of Aerospace Engineering, Tamkang University, Taipei, Taiwan 25137, R.O.C.
*
*Professor
**Research Assistant
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Abstract

Fluid flow and heat transfer in duct fan flows with a 90° rectangular-wing turbulator, mounted on the top duct wall, were experimentally studied and compared with the bottom-wall turbulator results. Threecomponent velocities were measured to characterize the flow structures and to obtain near-wall flow parameters. Temperatures on heat transfer surfaces were measured to obtain Nusselt number distributions. Results show that the turbulator has the effect to increase the near-wall axial mean velocity, axial vorticity and turbulent kinetic energy, and, consequently, augment the heat transfer. The axial mean velocity and axial vorticity play an influential role on the heat transfer distributions for the flows across the top-wall and bottom-wall turbulators, respectively.

Keywords

Fan flowTurbulatorConvective heat transfer.
Type
Technical Note
Information
Journal of Mechanics , Volume 24 , Issue 2 , June 2008 , pp. N15 - N19
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2008

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References

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