Abstract
The PIV-based evaluation of pressure field and the direct single-point measurement by a miniature static-pressure probe (SP-probe) are combined for further improvement in the velocity-pressure correlation measurement.In order to improve the signal-to-noise ratio of the PIV-based pressure evaluation, the proper orthogonal decomposition (POD) was applied to the pressure gradient evaluated from the PIV results, and the pressure signals directly measured by the SP-probe was used as a reference to determine the number of POD modes to be used in the pressure evaluation. Fluctuating pressure obtained by the present method was in good agreement with that directly measured by the pressure probe, and the improvement was also observed in the velocity-pressure correlation measurement.
