Abstract
The thermoacoustic engine can convert heat energy into acoustic energy. Heat energy cannot superpose while acoustic energy can superpose. Superposing acoustic energy that several thermoacoustic engines generated leads to the effective utilization of energy. This study tried superposing acoustic energy that double thermoacoustic engines generated. Those engines consist of engine part that form a parallel line cylinder and resonator part. As a result, superposing acoustic energy could not happen because those engines were in the opposite phase. Therefore the jointed part division plate was inserted. In consequence, superposing acoustic energy could happen because those engines were in the coordinate phase.
