Abstract
We measured simultaneously the pressure and the velocity of the oscillating gas to determine the work flow and the phase difference between the pressure and velocity in a thermoacoustic traveling wave engine. We revealed that heat flow was converted into work flow through the Stirling cycle in the present engine. Moreover, we could determine a position where only the traveling wave is formed. An installation of a second regenerator at this particular position led us to construct a thermoacoustic Stirling cooler with low viscous losses.
