Abstract
The measurement of pressure fluctuations in air flows poses several serious problems to the experimentalist. Generally a very limited frequency response is available, as the cavity above ordinary pressure transducers plays a crucial role for the sensor response. This type of transducer requires extensive work for incorporation into a surface. Recently, piezoelectric foil has become available for various applications. It offers ease of application and distributed measurements without strict frequency response limits. However, although the data acquisition is straightforward, it appears that particular caution is required for interpretation of the data as pressure fluctuations. In the present paper, emphasis is put on frequency response, true root‐mean‐square determination, as well as interpretation into skin friction data. Through analysis of flight data and laboratory calibrations, it is shown that the piezoelectric foil in general will respond to pressure fluctuations, and it is also shown that the piezofoil constitutes a repeatable and rugged source of information.
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