Numerical simulation of flow dynamics in the periodic regime inside an idealized thermoacoustic engine

Lin Ma (1) , Catherine Weisman (1) , Diana Baltean (1) , Ivan Delbende (1) , Luc Bauwens (1)

1 LIMSI - Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur

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.

Mots clés: Thermoacoustique; Simulation numérique

Domaines: Physique [physics]; Mécanique des fluides [physics.class-ph]

Lin Ma, Catherine Weisman, Diana Baltean, Ivan Delbende, Luc Bauwens. Numerical simulation of flow dynamics in the periodic regime inside an idealized thermoacoustic engine. PAMIR International Conference on Fundamental and Applied MHD, Jan 2014, Riga, Latvia. ⟨hal-01839740⟩