Title

Heat Transfer and Pressure Drop Characteristics in a Converging-Diverging Duct: (Heat Transfer and Pressure Responses to Rounding of Peaks)

Document Type

Article

Date of Original Version

1-1-1986

Abstract

Numerical computations were carried out to determine the heat transfer and pressure drop responses to the rounding of the peaks of a converging-diverging duct. A cosine-wall duct was selected as a representative duct which has a large degree of peak roundness. Computations were carried out for Prandtl number of 0.7, in the Reynolds number range from 100 to 1 000, for various taper angles of the duct, and for three ratios of maximum-minimum heights of the duct. The rounding of the peaks brought about a decrease in the friction factor. The heat transfer performance of the rounded duct was compared with the unrounded duct under three different constraints: fixed pumping power, fixed pressure drop and fixed mass flow. The heat transfer rate was relatively insensitive to whether the peaks were sharp or rounded. © 1986, The Japan Society of Mechanical Engineers. All rights reserved.

Publication Title

Transactions of the Japan Society of Mechanical Engineers Series B

Volume

52

Issue

477

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