Journal
JOURNAL OF TURBULENCE
Volume 13, Issue 50, Pages 1-19Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14685248.2012.734625
Keywords
turbulent boundary layer; static-pressure fluctuation; outer and inner scaling; wall pressure; background noise; flow boundary conditions; direct numerical simulation
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Funding
- Japan Society for the Promotion of Science [20360083]
- Collaborative Research Program of Research Institute for Applied Mechanics, Kyushu University
- Grants-in-Aid for Scientific Research [20360083, 23360082] Funding Source: KAKEN
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We have developed a small pressure probe and measured both static pressure and wall pressure simultaneously in turbulent boundary layers up to Reynolds numbers based on the momentum thickness R-theta similar or equal to 44,620. The measurements were performed at large experimental facilities in Sweden, Australia, and Japan. We find that the measured pressure data are contaminated by the artificial background noise induced by test section and are also affected by the flow boundary conditions. By analyzing data from different wind tunnels acquired at the same Reynolds number, we evaluate the effect of background noises and boundary conditions on the pressure statistics. We also compare the experimental results with results of direct numerical simulations and discuss differences in boundary conditions between real and simulated wind tunnels.
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