Transactions of the Japan Society of Mechanical Engineers
Online ISSN : 2185-9485
Print ISSN : 0029-0270
ISSN-L : 0029-0270
Experiment on the Heat-Transfer of Oil-Cooling Pipe
Harumi ASAWO
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1958 Volume 24 Issue 148 Pages 1039-1043

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Abstract
Our object is to perform an exact experiment, in accordance with my own similarity, on oil-cooling of laminar flow in the circular pipe with constant temperature. Here, the similarity is that the mean temperature θm of passed flow oil depends not only on Gz=Wc/kL but also on s'=(ti-tw)/(ti-t) and K=ω/R (ti-t), and these are dimensionless quantities. We have carried out a series of experement on θm to Gz under the condition that s' and K have been kept at constant values. And we have varied the values of s' and K at each series of experiment by changing oil or temperature ranges. As the result of our experiments we have made sure that curves of θm to Gz are distinguished from the Nusselt's curve and separates with one another by the values of s' or K, and so it can be recognized that my similarity is right.
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