Abstract
Simultaneous measurement of fluctuating velocity and pressure is conducted in a wake of circular cylinder with the Reynolds number of 3900. and the measured velocity-pressure correlation is compared with the computational reference data obtained by a large-eddy simulation in order to validate the measurement results. It is shown that the experimental and computational resuits of correlation between the streamwise velocity component and pressure, up, are in good agreement, while there was certain disagreement between the profiles of up, the correlation between the transverse velocity component and pressure. It is found in the further investigation that up is extremely sensitive to a small time lag between the velocity and pressure signals whist up is insensitive, and the experimental results with correction of the time lag is in acceptable agreement with the computational result.
