HEAT TRANSFER AND FRICTION OF ROUGH DUCTS CARRYING GAS FLOW WITH VARIABLE PHYSICAL PROPERTIES.

Author(s) : VILEMAS J. V., SIMONIS V. M.

Type of article: Article

Summary

THE PAPER PRESENTS THE RESULTS OF AN EXPERIMENTAL INVESTIGATION INTO THE LOCAL HEAT TRANSFER AND FRICTION OF GAS (AIR) FLOW IN ANNULI WITH THE INNER ROUGH TUBE. THE CORRELATIONS HAVE BEEN DEVELOPED TO CALCULATE THE HEAT TRANSFER AND FRICTION OF ROUGH ANNULI WITH ALLOWANCE FOR THE EFFECT OF VARIABLE PHYSICAL PROPERTIES OF A COOLANT AND ALSO THE RELATIONSHIPS FOR THE HYDRODYNAMIC AND THERMAL FUNCTIONS OF ROUGHNESS TO DETERMINE THE THERMOHYDRAULIC CHARACTERISTICS OF ROUGH TUBE CLUSTERS. IT HAS BEEN ESTABLISHED THAT, IN CONTRAST TO SMOOTH TUBES, THE EFFECT OF VARIABLE PHYSICAL PROPERTIES OF THE GAS ON HEAT TRANSFER IN ROUGH TUBES DEPENDS ON DIMENSIONS AND REYNOLDS NUMBER AND DIMINISHES WITH THE INCREASE OF THESE PARAMETERS.

Details

Original title: HEAT TRANSFER AND FRICTION OF ROUGH DUCTS CARRYING GAS FLOW WITH VARIABLE PHYSICAL PROPERTIES.
Record ID : 1985-2322
Languages: English
Source: International Journal of Heat and Mass Transfer - vol. 28 - n. 1
Publication date: 1985

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Indexing

Themes: Mass transfer
Keywords: Heat transfer coefficient; Friction; Roughness; Tube; Duct; Pressure drop