Abstract
Turbulent boundary layer pressure fluctuation measurements for longitudinal flow over a cylinder were made with piezoelectric and piezoresistive pressure transducers. The smaller piezoresistive transducer yielded results which did not require correction for transducer size. This data compared favorably with classic results, to which Corcos' corrections were applied. The data from the piezoelectric transducers, when corrected as proposed by Corcos, showed excellent agreement with classic results. In addition, corrected piezoelectric transducer data collapsed to a single nondimensional spectral density curve for a length of Reynolds number range of 9.6 × 106 to 1.27 × 107. The spatial frequency response of the piezoresistive transducer was far superior to the piezoelectric ones (fδ */U∞ = 0.93 vs 0.3). In addition, much less attenuation of the low‐frequency portion of the spectrum was realized with the piezoresistive transducer. Nondimensional rms pressure fluctuation levels, and convection velocities determined from the data, also show good agreement with previous results.
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