| Summary: | Approved for public release; distribution is unlimited === The computerized measurement of thermoacoustically generated
temperature gradients in short, thin plates is reported. The
computerized data acquisition system is delineated. The
temperature difference developed across a stack of short plates
was measured as a function of the longitudinal position of the
plates in a resonant tube for acoustic pressure amplitudes of 0.5
to 6.6 kPa, and static (or mean) pressures from 100 to 440 kPa,
in argon and helium for the first through the third harmonic
frequencies of the tube. Measured data were compared with
predictions based on work done by Wheat ley and others [J.
Wheatley, et al., Journal of the Acoustical Society of America,
v. 74, pp. 153-170, 1983] and results reported by Muzzerall
(Master's Thesis in Engineering Acoustics, Naval Postgraduate
School, Monterey, CA, September 1987). For low acoustic and
static pressures, there is good agreement between measured data
and theory. As the acoustic pressure amplitudes increase there
is a general degradation of agreement up to the point at which it
appears saturation of the thermoacoustic effect occurs. === http://archive.org/details/computerizedmeas00kite === Lieutenant Commander, United States Navy
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