Journal of the Japanese Society for Experimental Mechanics
Print ISSN : 1346-4930
ISSN-L : 1346-4930
Original Papers
Development of a Hot-Wire Anemometer Probe Specializing in Measuring the Boundary Layer of a Circular Cylinder
Toshiaki KENCHIShinji HONMURAMakoto YAMADAMasahito KAWAI
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2021 Volume 20 Issue 4 Pages 265-271

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Abstract

   The boundary layer and velocity shear layer that develop around a circular cylinder placed in a flow have a significant effect on lift and drag depending on whether it is laminar or turbulent. These shear layers are so thin that special measures are required for the experiment. In this study, a specially shaped probe was developed to measure the boundary layer using a hot-wire anemometer. An experiment was performed using with that probe at Re = 1.6×104. As a result, the velocity distribution and the velocity fluctuation distribution of the extremely thin boundary layer of 0.5 mm were measured. The frequency analysis showed that the separated laminar shear layer transitioned to turbulent flow near the boundary with the separated region.

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© 2021 The Japanese Society for Experimental Mechanics
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