Numerical simulation of a thermoacoustic refrigerator. 2: Stratified flow around the stack

Journal Article · Mon Aug 10 04:00:00 EDT 1998 · Journal of Computational Physics

DOI:https://doi.org/10.1006/jcph.1997.5816· OSTI ID:653495

Worlikar, A S; Knio, O M ^[1]; Klein, R ^[2]

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1. Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Mechanical Engineering
2. Bergische Univ. Wuppertal (Germany). Fachbereich Sicherheitstechnik

The unsteady, two-dimensional, thermally stratified flow in the neighborhood of an idealized thermoacoustic stack is analyzed using a low-Mach-number model that extends the adiabatic flow scheme developed in part 1 (Journal of Computational Physics 127, 424 (1996)). The extension consists of incorporation of numerical solvers for the energy equations in the fluid and the stack plates, and construction and implementation of fast Poisson solver for the velocity potential based on a domain decomposition/boundary Green`s function technique. The unsteady computations are used to predict the steady-state, acoustically generated temperature gradient across a two-dimensional couple and to analyze its dependence on the amplitude of the prevailing resonant wave. Computed results are compared to theoretical predictions and experimental data.

• OSTI ID: 653495
• Journal Information: Journal of Computational Physics, Journal Name: Journal of Computational Physics Journal Issue: 2 Vol. 144; ISSN JCTPAH; ISSN 0021-9991
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ACOUSTICS
COMPARATIVE EVALUATIONS
FINITE DIFFERENCE METHOD
NUMERICAL ANALYSIS
REFRIGERATORS
TEMPERATURE GRADIENTS
TWO-DIMENSIONAL CALCULATIONS