Numerical simulation of flow dynamics in the periodic regime inside an idealized thermoacoustic engine
Résumé
Flow dynamics in the stack and heat exchangers of a standing wave thermoacoustic engine are studied using 2D numerical simulations. The numerical approach is based on asymptotic coupling in the low Mach number limit, of a nonlinear dynamic model in the active cell with linear acoustics in the resonator. Computed results of the periodic regime are analyzed and exhibit two main features: instability and vortex dynamics.