抄録
We have made a simple loop-type thermoacoustic engine that will be used for a refrigerator and examined pressure amplitude of oscillation along the loop tube changing a mixed ratio of He-Ar mixture in the loop tube. We have tried to find the efficiency of energy conversion in the stack by assuming that the acoustic wave could be expressed as the superimposition of the standing wave component and the progressing wave component that attenuates linearly along the loop. It is found that the efficiency changes remarkably depending on the mixed ratio of the mixture.
