The stack is thermoacoustic source of thermoacoustic engine. It absorbs heat energy from outside heat source to compensate for heat loss of the thermoacoustic engine and keep the engine oscillate.

回热器是热机系统的热声源，从外热源吸收热能补偿热机系统的能量耗散，维持系统的热声振荡。

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The stack is thermoacoustic source of thermoacoustic engine. It absorbs heat energy from outside heat source to compensate for heat loss of the thermoacoustic engine and keep the engine oscillate.

回热器是热机系统的热声源，从外热源吸收热能补偿热机系统的能量耗散，维持系统的热声振荡。

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