Abstract
The traveling wave thermoacoustic engine amplifies the acoustic power when a traveling wave passes the bundle of narrow channels with an axial temperature gradient. It has been experimentally determined that the maximum gain reaches ratio of absolute temperatures when using an ideal gas. In this study, we set up the traveling wave thermoacoustic engine combined with oscillatory water flow, and for this device with liquidvapor phase change, the acoustic power is measured by both Laser Doppler Velocimeter(LDV) and pressure trasducers. The result indicates that liquid-vapor phase change achieves the acoustic power amplification beyond the theoretical limit of ideal gas.
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