Dynamics and Particle Image Velocimetry Measurements of Miniaturized Thermoacoustic Refrigerators

Dynamics and Particle Image Velocimetry Measurements of Miniaturized Thermoacoustic Refrigerators
By:
Published on 2007 by ProQuest

This research deals with the design and characterization of the dynamics of miniaturized thermoacoustic refrigerators (in the audible frequency range ∼ 4000 Hz) using a random array of cotton wool as the stack and a commercial piezoelectric loudspeaker as the acoustic driver. Also of primary interest is the optimization of the refrigerator by investigating the factors affecting its performance such as the stack configuration, the acoustic drive ratio, the acoustic pressure and the mean pressure in the refrigerator. Experimental measurements of cooling power, and stray heat leaks were conducted. Digital particle image velocimetry (DPIV) was used to study the acoustic flow field in the refrigerator and to correlate measurements using PIV to the characteristic acoustic measurements.

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