Abstract
Experimental investigation was made on blow-out phenomena of cooled and heated air from a thermoacoustic refrigeration tube. It is well known that the inside air near the cold side of the stack was cooled and the air near the hot side of the stack was heated in a thermoacoustic refrigeration tube. In addition, the cooled air was found to blow out naturally from a small hole near the antinode of the thermoacoustic tube and ambient air was found to be evacuated through a small hole near the pressure node. Mean pressure increased when a hole position approached to the antinode along the tube and with the increase of acoustic power. The phenomena were explained by the acoustic radiation pressure occurred by non-linear effect of acoustic propagation in a tube.
