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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

CROSS FLOW INFLUENCE UPON IMPINGEMENT CONVECTIVE HEAT TRANSFER IN CIRCULAR ARRAYS OF JETS : A GENERAL CORRELATION

Get access (open in a dialog) DOI: 10.1615/IHTC7.1950
pages 343-347

Аннотация

A mathematical formalism is presented to take account of the cross flow influence upon impingement heat transfer rates for arrays of circular jets. A one dimensional flow description yields a novel dimensionless parameter based upon the length of the array in the exit cross flow direction. The overall average Nusselt Number can then be evaluated as:
Nux = (Nox + Nux) Ψ
where Nox is the Nusselt number in the absence of cross flow, Nux and Ψ being analytical functions of Z/D (impingement distance to jet diameter ratio), m (cross flow to jet momentum ratio), Rex (cross flow Reynolds number based on jet spacing). Accuracy is ± 10% within the range of parameters examined.