Abstract
We introduce a forced oscillation method for analyzing a thermoacoustic engine unit. In this method, the internal gas is forced to oscillate by an acoustic driver at the arbitral operating condition regarding the oscillating frequency and the temperature difference. In the experiment, we found the thermal efficiency of the multistage thermoacoustic engine unit reached 6.1 % of Carnot efficiency when the operating frequency was 40 Hz and the temperature difference was 130 K.
