Calculated effects of pressure-driven temperature oscillations on heat exchangers in thermoacoustic devices with and without a stack

Abstract

A Lagrangian computational method is used to explore the performance of heat exchangers in conditions of oscillating flow and oscillating pressure relevant to thermoacoustic devices. Pressure oscillations cause temperature oscillations within the working gas. Depending on phase, these “pressure-driven temperature oscillations” can enhance or degrade heat transfer within the exchangers of a thermoacoustic device.