Journal
MEASUREMENT SCIENCE AND TECHNOLOGY
Volume 13, Issue 10, Pages 1608-1614Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-0233/13/10/314
Keywords
static pressure; pressure tapping
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Measurements are reported of the error in wall static pressure reading due to the finite size of the pressure tapping. The experiments were performed in incompressible turbulent pipe flow over a wide range of Reynolds numbers, and the results indicate that the correction term (as a fraction of the wall stress) continues to increase as the hole Reynolds number d(+) = u(tau)d/v increases, contrary to previous studies. For small holes relative to the pipe diameter the results follow a single curve, but for larger holes the data diverge from this universal behaviour at a point that depends on the ratio of the hole diameter to the pipe diameter.
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