A Nonlinear Model of Thermoacoustic Devices



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The Journal of the Acoustical Society of America


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.



Thermoacoustic device, Refrigerators, Thermodynamic states and processes


Copyright 2002 The Journal of the Acoustical Society of America. Recommended citation: Karpov, Sergey, and Andrea Prosperetti. "A nonlinear model of thermoacoustic devices." The Journal of the Acoustical Society of America 112, no. 4 (2002): 1431-1444. DOI: 10.1121/1.1501277 URL: https://asa.scitation.org/doi/abs/10.1121/1.1501277 Reproduced in accordance with the original publisher’s licensing terms and with permission from the author(s).