抄録
When a gas-filled closed column is driven at the resonant frequency of the column, finite amplitude standing wave is induced. Acoustic compressor is a device which is based on this standing wave under the region of the finite amplitude wave. In this paper, axial symmetric convergent tubes are used. It was confirmed that a shock wave appeared in a cylindrical resonator and thereby the amplitude of the standing wave has a cut off value. This phenomena is called acoustic saturation, and the cylindrical resonator could not use for an acoustic compressor. In this paper, the large amplitude pressure fluctuation is measured by use of the exponential converging resonator and the resonant type driver which have a mechanical resonant frequency near that of the gas-column. The experimental research was conducted and its compression ratio was compared with numerical simulation.
