Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : December 04, 2021
Measurements and analysis of the critical temperature difference (ΔTcrit) and the oscillation temperature of the hot heat exchanger (TH) of a wet standing wave thermoacoustic engine under various mean pressure (Pm) are presented. A standing wave thermoacoustic engine with the total length of 675 mm was constructed and operated under the vacuum pressure condition. A wet honeycomb ceramic with size 2/1200 and length 40 mm was used as the stack in this research. Experimental results showed that ΔTcrit and TH has the tendency to decrease as the mean pressure decreases. The value of TH did not exceed its boiling point for Pm ≥ 50 kPa. However, when Pm ≤ 40 kPa, the value of TH exceeded its boiling point. In this research, no oscillation was observed when the mean pressure was equal or below 20 kPa.
