The measurements of thermoacoustic phenomena using thermoacoustic couples

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Author
Ao, Chia-ning
Date
1989-06Advisor
Atchley, Anthony A.
Second Reader
Hofler, Thomas J.
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Show full item recordAbstract
Thermoacoustic heat transport and its applications, such as thermoacoustic
engines and refrigerators, have been discussed in a number of articles over the
past several years. However, lacking from these articles is a thorough,
quantitative experimental investigation of the basic theory underlying
thermoacoustic heat transport. Such an investigation is the purpose of this thesis.
A logical starting point for such a study is to investigate the simplest class of
thermoacoustic engine - a stack of short plates referred to as a ThermoAcoustic
Couple, or TAC. The utility of this choice is that the theory can be reduced to its
simplest form for analysis of the results. The results of measurements of
thermoacoustically generated temperature gradients in TACs subjected to
acoustic standing waves are reported. The value of the temperature gradient,
which results from an acoustically generated entropy flow in the gas in thermal
contact with the plate, is a function of the acoustic pressure amplitude, the mean
gas pressure, the Prandtl number of the gas, the configuration of the TAC, and its
position in the standing wave.
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