Abstract
This paper introduces a two-stage traveling wave thermoacoustic engine which could convert thermal energy to acoustic power. The acoustic field characteristics and operational performances of the two-stage traveling wave thermoacoustic engine are studied based on DeltaEC. The focus of this work is on the distribution of acoustic field along a thermoacoustic engine unit. According to the simulation results: the thermal efficiency 40.2% was obtained, the relative Carnot efficiency is 60.2%, and the maximum pressure ratio is 1.37 with the condition that pressurized helium at 2.5MPa is used as working gas and the temperature difference between two ends of regenerator is 550K.
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