Convection Heat Transfer for Turbulent Flow in Subsonic Diffusers

[+] Author and Article Information
J. H. VanSant

Lawrence Radiation Laboratory, University of California, Livermore, Calif.

M. B. Larson

University of North Dakota, Grand Forks, N. D.

J. Heat Transfer 88(4), 391-398 (Nov 01, 1966) (8 pages) doi:10.1115/1.3691584 History: Received March 08, 1965; Revised May 24, 1965


Heat-transfer rates from a heated, plane-wall, symmetrical, two-dimensional, subsonic diffuser to air were measured at total divergence angles ranging from 0 to 45 deg, at diffuser-wall, length-to-throat width ratios ranging from 6 to 18 and at Reynolds numbers based on throat velocity and throat width ranging from approximately 40,000 to 300,000. Diffuser flow conditions developed were: No “appreciable” separation, large transitory stall (separation) and fully developed, two-dimensional stall. Fluid boundary layers on the diffuser walls were always turbulent and were assumed to be incompressible. Flow studies were made in conjunction with the heat-transfer measurements by observing flow patterns with tufts and smoke. Velocity measurements were made in fully developed, two-dimensional stall. Predictions of heat transfer were made for the conditions of no “appreciable” separation and fully developed two-dimensional stall.

Copyright © 1966 by ASME
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