Journal of the Visualization Society of Japan
Online ISSN : 1884-037X
Print ISSN : 0916-4731
ISSN-L : 0916-4731
Effect of Pipe-Diameter Ratio on Heat Transfer and Flow Characteristics of Impinging Jet from Coaxial Circular Pipe
Junichiro KAIMinoru FUKUHARAHiroshi KATANODANaoko IINOAkio KAMEDA
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2007 Volume 27 Issue Supplement1 Pages 95-96

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Abstract
The impinging jet is widely used in the industrial field, as high heat transfer characteristics are obtained in the vicinity of a stagnation point on the object surface. In this paper, the heat transfer characteristics on the impinging wall after being blown off through a coaxial circular pipe were examined by changing the pipe-diameter ratio and the velocity ratio. As a result, the optimum values of the pipe-diameter ratio and the velocity ratio were found in the given conditions. The influence of the pipe-diameter ratio and the velocity ratio on the flow structure was clarified by the flow visualization.
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