気液相変化を利用した多段型熱音響エンジンの発振特性

抄録

Thermoacoustic engine utilizing evaporation and condensation of liquid is one of promising device for utilization of unused thermal energy at low temperature level. In this paper, cascade thermoacoustic engine composed of a wet-type prime mover using phase change and a dry-type prime mover has been proposed. Experiments were performed in a vertical cylinder system with evaporator, by varying temperature at hot side T_H2 and cold side T_C2 in dry stack. As the results, it was found that the acoustic power was amplified with increasing temperature ratio T_H2/T_C2. The characteristics of gas oscillation was also discussed in relation to input heat in evaporator and length of resonance tube.