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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Numerical Study of Flow and Heat Transfer Characteristics of Different Distributed Corrugated Tube Bundles

Get access (open in a dialog) DOI: 10.1615/IHTC15.hte.009424
pages 4007-4020

要約

Flow and heat transfer characteristics of malposed and traditional corrugated tube bundles are investigated in this study. The velocity, pressure drop, dimensionless turbulent kinetic energy of vapor in the malposed and traditional tube bundles are detailed. The Nusselt number, frictional resistance and overall heat transfer performance of the malposed and traditional tube bundles with a Re range of 15000 to 55000 are also studied. The results obtained from this study show that when the Re ranges from 15000 to 55000, the velocity, pressure drop, dimensionless turbulent kinetic energy are more uniform in the malposed tube bundles than those in the traditional tube bundles. The local Nusselt numbers in the axial and circumferential directions are more uniform in the malposed tube bundles than those in the traditional tube bundles, whereas the local ?P decreases more obviously along the traditional tube bundles and the fluctuation is larger. The malposed tube bundles and the traditional tube bundles have similar Nusselt numbers whereas the malposed corrugated tube bundles have smaller frictional resistances, making the malposed corrugated tube bundles have a better overall heat transfer performance of 7-24%.