Low Mach number simulation of a loaded standing-wave thermoacoustic engine
Résumé
Numerical simulations of a loaded standing-wave thermoacoustic engine are performed using a low Mach number model. This work uses a simplified model based on coupling the nonlinear flow and heat exchange in the heat exchangers and the stack with a linear acoustic model of the resonator and load. The two-dimensional unsteady numerical solution in the heat exchangers and stack region shows the amplification process until saturation is obtained. The influence of the load model on the wave saturation is studied, yielding a specific load range for saturation at levels comparable with experiments. In order to investigate the energy conversion within the standing-wave thermoacoustic engine, the acoustic power developed is calculated and the efficiency is estimated. Finally, the effect of the distance between stack and heat exchangers (with particular consideration of the case where the heat exchangers and stack are directly in contact) is also discussed.
Domaines
Acoustique [physics.class-ph]
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...