Aeroacoustic gas composition monitor

Details Aeroacoustic gas composition monitor Aeroacoustic gas composition monitor

1990-10-11

1993-05-18

Williams, Hezron E.

Measuring and testing

Gas analysis

With compensation detail

73 3105, G01N 3700

Patent

active

052110524

ABSTRACT:
The composition monitor uses a flow driven acoustic resonator whose frequency is simply related to the speed of sound of the gaseous mixture present in the cavity resonator. Because the speed of sound is a function of temperature and composition of mixtures, the oscillator frequency signal may be used to measure the composition and control the process. The aeroacoustic sources have the advantage that they are immune to high pressure and high temperature and are energized by flows leading into or out of reactors. In addition, sound is led to a measurement microphone from the source by a solid rod which isolates it from high pressure and temperature obtaining thereby a robust sensor.

REFERENCES:
patent: 4896540 (1990-01-01), Shakkottai
Shakkottai et al., "High Intensity Tone Generation by Aeroacoustic Sources", J. Acoust. Soc. Am, 82, (6), Dec. 1987, pp. 2075-2085.
Shakkottai, et al., "Tone Generation By Aeroacoustic Sources in Pipes with Flow" J. Acoust. Soc. AM, 87(4), Apr. 1990, pp. 1489-1496.

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