JSME International Journal Series B Fluids and Thermal Engineering
Online ISSN : 1347-5371
Print ISSN : 1340-8054
ISSN-L : 1340-8054
Measurements of Surface Pressure Distributions on a Freely Falling Sphere with Built-In Processors
Yasuo IkushimaWei Wang GuoMichio Ohji
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1993 Volume 36 Issue 2 Pages 266-271


A test sphere 100mm in diameter with programmable built-in processors was constructed to make surface pressure measurements during its free fall. The pressure data were stored in the body and transmitted to an external host computer after landing for further processing. The tests were performed under the smooth-surface condition and were compared with existing experimental data taken in wind tunnels, up to the Reynolds numbers of about 105. The results showed that the gravitational acceleration was of little importance here, and that the apparatus worked with sufficient accuracy.

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© The Japan Society of Mechanical Engineers
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