The present investigation, sponsored by the U. S. Naval Postgraduate School and performed in Illinois Institute of Technology, is an extension of the work of Jakob and Dow dealing with the heat transfer between a cylinder and air flowing parallel to the longitudinal axis. Spherically tipped nosepieces of various lengths were attached to an electrically heated cylinder. The results show that the heat transfer is a function of the ratio of heated length to total length. Comparison of the results with those of Jakob and Dow indicates a decrease of the heat transfer with increasing cylinder radius. Extrapolation to infinite radius (flat plate), however, is uncertain. Therefore, it is recommended that an average value of the heat-transfer coefficient be used independent of the curvature pending further studies of the influence of configuration and turbulence level.

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