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Heat transfer and pressure drop characteristics of spirally fluted annuli. 1. Hydrodynamics. 2. Heat transfer.

Author(s) : GARIMELLA S., CHRISTENSEN R. N.

Type of article: Article

Summary

Flow mechanisms documented elsewhere are combined with pressure drop measurements to propose friction factor correlations for the low Reynolds number (lower than 800) and the high range (between 800 and 43,000). Friction factors were found to be functions of the flute depth, pitch and angle, and the annulus radius ratio. Fourteen fluted tubes with varying geometries were studied, with up to three outer smooth tubes for each fluted tube. Flow patterns and transitions between flow regimes investigated through visualization tests, friction factor data, and tube surface-temperature measurements were used to explain the enhancement phenomena.

Details

  • Original title: Heat transfer and pressure drop characteristics of spirally fluted annuli. 1. Hydrodynamics. 2. Heat transfer.
  • Record ID : 1996-0787
  • Languages: English
  • Source: J. Heat Transf. - vol. 117 - n. 1
  • Publication date: 1995/02
  • Document available for consultation in the library of the IIR headquarters only.

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