Thermo-Fluid Mechanic Study of Thermoacoustic Devices
Summary rept. 1 Jun 96-31 May 97
JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF MECHANICAL ENGINEERING
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The work is articulated in three separate projects a development and study of a simplified model of thermoacoustic devices b visualization of oscillating temperature and flow fields c numerical modeling. During the past year, in area a, work has focused on an approximate time-domain formulation of the thermoacoustic instability and on the heat and momentum exchange modeling in area b, heat transfer data have been obtained by holographic interferometry and a new thermoacoustic refrigerator suitable for further experimentation has been designed in area c thermal stratification effects have been fully incorporated in a new algorithm with results that are significantly different from the linear theory and compare very well with data.
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