A Nonlinear Model of Thermoacoustic Devices

Sergey Karpov, Andrea Prosperetti

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This paper presents a nonlinear, time-domain model of thermoacoustic devices based on cross-sectional averaged equations. Heat transfer perpendicular to the device axis - which lies at the core of thermoacoustic effects - is modeled in a novel and more realistic way. Heat conduction in the solid surfaces surrounding the fluid medium is included. Contrary to the previous versions of this model [Watanabe et al., J. Acoust. Soc. Am. 102, 3484¿3496 (1997)], the present version does not require artificial damping and is numerically robust. The model performance is illustrated on several examples: a prime mover, an externally driven thermoacoustic refrigerator, and a combined prime mover/refrigerator system.
Original languageUndefined
Pages (from-to)1431-1444
Number of pages14
JournalThe Journal of the Acoustical Society of America
Issue number4
Publication statusPublished - 2002


  • METIS-207422
  • IR-43790

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