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INVESTIGATION OF HEAT TRANSFER AND PRESSURE DROP AUGMENTATION FOR TURBULENT FLOW IN SPIRALLY ENHANCED TUBES.

Author(s) : GARIMELLA S.

Summary

THE PERFORMANCE OF SPIRALLY ENHANCED TUBES IS DISCUSSED IN THE PAPER IN TERMS OF HEAT TRANSFER ENHANCEMENT, FRICTION FACTOR ENHANCEMENT, ANDENHANCEMENT EFFICIENCY AS A FUNCTION OF A SINGLE NONDIMENSIONAL GEOMETRIC PARAMETER, THE SEVERITY. HEAT TRANSFER AND FRICTION FACTOR DATA FROM MORE THAN 60 DIFFERENT TUBES ARE SHOWN TO COLLAPSE TO A SINGLE CURVE WITH MINIMAL SCATTER WHENPLOTTED AS A FUNCTION OF THE SEVERITY. IT IS SHOWN THAT IN TURBULENT FLOW THE INCREASE IN FRICTION FACTOR IS USUALLY MUCH LARGER THAN THE CORRESPONDING INCREASE IN HEAT TRANSFER. IN ADDITION, VALUES OF SEVERITY BETWEEN 0.001 AND 0.01 ARESHOWN TO YIELD OPTIMUM ENHANCEMENT FOR TURBULENT FLOW.

Details

  • Original title: INVESTIGATION OF HEAT TRANSFER AND PRESSURE DROP AUGMENTATION FOR TURBULENT FLOW IN SPIRALLY ENHANCED TUBES.
  • Record ID : 1989-2194
  • Languages: English
  • Publication date: 1988
  • Source: Source: ASHRAE Trans.
    vol. 94; n. 2; 1119-1131; 4 fig.; 1 tabl.; 14 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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