Abstract
Piezoelectric pressure transducers constructed of electrically polarized polyvinylidene fluoride (PVDF) were assessed as spatial filters for a spatially homogeneous turbulent boundary layer induced wall pressure field. Rectangular-shaped transducers were constructed of lengths ranging from 0.25 to 7.3 times the displacement thickness of the boundary layer in the streamwise direction and widths of 0.25 the displacement thickness. Measurements of the power spectral levels of the wall pressure fluctuations are compared for each transducer with the predicted levels determined by the integration over the spatial extent of each transducer of the Corcos model of the wall pressure cross spectrum. [Work supported by ONR.]
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