ABSTRACT: The simplified quasi-one-dimensional model of thermoacoustic devices formulated
in Part I ( Watanabe, Prosperetti, and Yuan, J. Acoust. Soc. Am., submitted) is studied in
the nonlinear regime. A suitable numerical method is developed which is shown to be able
to deal with the quasi-shock waves that develop in the system without inducing spurious
oscillations, damping, or numerical diffusion. The results are compared with some
experimental ones available in the literature. Several of the observed phenomena are
accurately reproduced by the model. Quantitative agreement is also good when a reasonable
allowance is made for likely temperature non-uniformities across the heat exchangers. ***
The sensitivity of the model to the input parameters and the effect of variations in the
cross section are also briefly considered.
J. Acoust. Soc. Am. 102, 3497-3506, 1997
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