Accession Number : ADA329588

Title :   Thermo-Fluid Mechanic Study of Thermoacoustic Devices

Descriptive Note : Summary rept. 1 Jun 96-31 May 97

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Prosperetti, A. ; Herman, C. ; Knio, O.

PDF Url : ADA329588

Report Date : 15 JUN 1997

Pagination or Media Count : 17

Abstract : 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.

Descriptors :   *FLOW VISUALIZATION, *REFRIGERATION SYSTEMS, *THERMOACOUSTICS, HEAT TRANSFER, MATHEMATICAL MODELS, TIME DOMAIN.

Subject Categories : Thermodynamics
      Air Condition, Heating, Lighting & Ventilating

Distribution Statement : APPROVED FOR PUBLIC RELEASE