Design and analysis of new concept fast-response pressure probes

Two cylindrical fast-response pressure probes for unsteady flow in turbomachinery have been designed and tested. available miniaturized pressure sensors have been used to high reliability and low manufacturing costs. Analytical and models have been applied to the design of the line–cavity system the pressure tap and the (encapsulated) sensor, to improve the behaviour of the probes. Dynamic calibrations in a low-pressure tube have also been carried out to determine the probe transfer and to extend the probe operating range beyond the resonance of the line–cavity system. One of the new probes exhibits a response of about 80 kHz in the range 0–35 kPa, a suitable value most turbomachinery applications.