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RESEARCH PAPERS

Hot-Wire Measurements of Turbulence Correlations in a Triangular Duct

[+] Author and Article Information
C. J. Cremers

Mechanical Engineering Department, University of Minnesota, Minneapolis, Minn.

E. R. G. Eckert

Thermodynamics and Heat Transfer Laboratory, University of Minnesota, Minneapolis, Minn.

J. Appl. Mech 29(4), 609-614 (Dec 01, 1962) (6 pages) doi:10.1115/1.3640643 History: Received July 07, 1961; Online September 16, 2011

Abstract

Previous studies by flow visualization have indicated that the flow through a duct of triangular cross section is in its characteristics quite different from flow through a duct with circular cross section. They revealed among others that purely laminar flow exists in the corners of the duct even though the bulk of the fluid moves in turbulent motion. Heat-transfer measurements in such a duct appear to indicate that the turbulent transport in the direction of the height of the duct is considerably smaller than expected from circular tube measurements. The present paper reports the measurements of turbulent correlations for turbulent flow through such a duct. These measurements have been made with hot wires of very small dimensions. They again reveal the existence of a laminar corner region. In the bulk of the fluid, the differences of the correlations to those in a round tube turned out to be smaller than originally suspected.

Copyright © 1962 by ASME
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