Laminar Heat Transfer Performances in a Tube with Center-Cleared Twisted Tape of Alternate Axes

Li Xiang Chen

doi:10.4028/www.scientific.net/AMR.1070-1072.1803

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1070-1072Laminar Heat Transfer Performances in a Tube with...

Laminar Heat Transfer Performances in a Tube with Center-Cleared Twisted Tape of Alternate Axes

Abstract:

To improve the heat transfer performance of laminar tubular flow, a center-cleared twisted tape of alternate axes was developed as inserts. Numerical simulation was conducted to investigate the effect of dislocation angle of twisted tapes on the thermo-hydraulic performances. The numerical results show that, the largest Nusselt number occurs at a dislocation angle of 60°. The friction factor f is relatively larger than that when the dislocation angle is 0°, and it exhibits an obvious increment with the dislocation angle. From the value of performance evaluation criterion (PEC), the best thermo-hydraulic performance is achieved at a 60° dislocation angle. The underlying mechanisms are analyzed in terms of flow field and temperature field.

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Periodical:

Advanced Materials Research (Volumes 1070-1072)

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1803-1807

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https://doi.org/10.4028/www.scientific.net/AMR.1070-1072.1803

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Online since:

December 2014

Authors:

Li Xiang Chen*

Keywords:

Heat Transfer, Laminar Flow, Numerical Simulation, Twisted-Tapes

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