Dynamic pressure comparator

Details Dynamic pressure comparator Dynamic pressure comparator

1983-01-14

1985-03-26

Goldberg, Gerald

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

73756, G01L 2700

Patent

active

045065390

ABSTRACT:
A dynamic pressure comparator for calibrating high frequency pressure transducers used for the measurement of rocket motor combustion instability and other transient phenomena includes an acoustic cylindrical cavity through which a jet stream of nitrogen is passed and at each of the opposite ends of which a transducer carrier is provided. Vortex systems and turbulence created as the jet enters and exits the cavity stimulate pressure transducers that are mounted in the carriers. The outputs of the transducers are monitored and compared as by the use of a spectrum analyzer. The comparator includes adjustments to vary the high frequency stimulus and the cavity pressure, and facilitates simulation of transducer installation in a given pressure measurement application, for example, on a rocket motor.

REFERENCES:
Sinusoidal Pressure Generator for Testing Pressure Probes, Ted Nyland, NASA, Proceedings of the 25th Annual ISA Conference, (Oct. 26-29, 1970) S2743, pp. 621-627.

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