複合メッシュ型スタックを用いた枝管付きループ管型熱音響エンジンの発振性能

Abstract

Thermoacoustic engines are one of promising devices for utilization of unused thermal energy. The object of this paper is to study effects of structure of regenerator in a thermoacoustic engine. Experiments were performed in a loop-tube-type traveling-wave thermoacoustic engine with branch resonator. The multi-mesh regenerator was constructed by combining of the stacked mesh having small flow channel to achieve lower onset temperature to require to induce self-excited gas oscillation and the stacked mesh having wide flow channel to induce larger pressure amplitude. The performance of the multi-mesh regenerator was clarified in relation to the length ratio of two types of the stacks.