Simultaneous measurement of fluctuating velocity and pressure in the near wake of a circular cylinder

Simultaneous measurement of fluctuating velocity and pressure in the near wake of a circular... Simultaneous measurement of fluctuating velocity and pressure by a static-pressure probe and a hot-wire probe was performed in the near wake of a circular cylinder, in order to strengthen reliability of the measurement technique. Effect of geometry of the static-pressure probe was systematically investigated, and validity of the measurement results was addressed by quantitative comparison with reference data by a large-eddy simulation. Interference between the probes was found to mainly depend on the diameter of the pressure probe and only weakly on the length. A certain time lag between the velocity and pressure signals was detected in the experiment, and the measurement results of velocity–pressure correlation $$\overline{up}$$ u p ¯ and $$\overline{vp}$$ v p ¯ obtained with the correction of the time lag were in good agreement with the computational results. It was also found that the measurement of $$\overline{vp}$$ v p ¯ is extremely sensitive to a small time lag between the velocity and pressure signals, while that of $$\overline{up}$$ u p ¯ is not. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Simultaneous measurement of fluctuating velocity and pressure in the near wake of a circular cylinder

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2014 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-014-1731-7
Publisher site
See Article on Publisher Site

Abstract

Simultaneous measurement of fluctuating velocity and pressure by a static-pressure probe and a hot-wire probe was performed in the near wake of a circular cylinder, in order to strengthen reliability of the measurement technique. Effect of geometry of the static-pressure probe was systematically investigated, and validity of the measurement results was addressed by quantitative comparison with reference data by a large-eddy simulation. Interference between the probes was found to mainly depend on the diameter of the pressure probe and only weakly on the length. A certain time lag between the velocity and pressure signals was detected in the experiment, and the measurement results of velocity–pressure correlation $$\overline{up}$$ u p ¯ and $$\overline{vp}$$ v p ¯ obtained with the correction of the time lag were in good agreement with the computational results. It was also found that the measurement of $$\overline{vp}$$ v p ¯ is extremely sensitive to a small time lag between the velocity and pressure signals, while that of $$\overline{up}$$ u p ¯ is not.

Journal

Experiments in FluidsSpringer Journals

Published: May 1, 2014

References

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