Abstract
A gas-filled looped pipe having a regenerator can operate as an efficient thermoacoustic cooler, when it is driven by an acoustic driver via a branch resonator. This is because the loop provides a feed-back pass of the acoustic work flow supplied from the driver. In this work, we test capability of a coaxial tube as a different configuration from the loop. The acoustic field in the coaxial tube having the regenerator between the inner and the output pipes is measured using a laser Doppler vecocimeter and a small pressure transducers. The work flow is observed to circulate through regenerator, meaning the feed back of the work flow.
