D-234 熱音響効果を用いた音波の増幅、減衰の実証

概要

論文の詳細を見る
In 1979 Ceperley proposed a "pistonless Stirling Engine" using thermoacoustic energy conversion due to traveling waves However, he didn't show any amplification of acoustic intensity overwhelming the losses in a regenerator. He attributed this result to a low acoustic impedance in a regenerator. In this experiment, we demonstrate the thermoacoustic energy conversion by using a resonance tube. When the second mode is induced in resonance tube, a high acoustic impedance is made at the middle of resonance tube. Also, pressure and velocity oscillations oscillated in phase at the nodes and antinodes, as in traveling waves. By installing the regenerator at the velocity node formed in the middle of the resonator, we show an amplification and attenuation of acoustic intensity in the regenerator.
日本流体力学会の論文
2003-07-28