Local Heat Transfer to Staggered Arrays of Impinging Circular Air Jets

[+] Author and Article Information
A. I. Behbahani, R. J. Goldstein

Mechanical Engineering Department, University of Minnesota, Minneapolis, Minn. 55455

J. Eng. Power 105(2), 354-360 (Apr 01, 1983) (7 pages) doi:10.1115/1.3227423 History: Received December 15, 1981; Online September 28, 2009


Measurements are made of the local heat transfer from a flat plate to arrays of impinging circular air jets. Fluid from the spent jets is constrained to flow out of the system in one direction. Two different jet-to-jet spacings, 4 and 8 jet diameters, are employed. The parameters that are varied include jet-orifice-plate to impingement-surface spacing and jet Reynolds number. Local heat transfer coefficients vary periodically both in the flow direction and across the span with high values occurring in stagnation regions. Stagnation regions of individual jets as determined by local heat transfer coefficients move further in the downstream direction as the amount of crossflow due to upstream jet air increases. Local heat transfer coefficients are averaged numerically to obtain spanwise and streamwise-spanwise averaged heat transfer coefficients.

Copyright © 1983 by ASME
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