G245 音響圧縮機の基本性能における実験的解析(G-24 波動・音・衝撃波(4),一般講演)

概要

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Finite amplitude standing wave in closed duct is extensively studied in recent years for its application in various practical fields. It is possible to obtain large amplitude shockless pressure waveform by properly designing the shape of the duct or by introducing waveform dispersion. The large amplitude pressure waveform obtained at closed end of the duct can be used to design acoustic compressor. Furthermore, Acoustic streaming and thermoacoustic effect induced by the oscillation of gas column in closed duct can be used to increase the velocity of the convection current and to design thermoacoustic engine and refrigerator. In this report, application of large amplitude pressure waveform to acoustic compressor is described. The half cosine shaped area change duct is used which is suitable to obtain large compression ratio. A prototype acoustic gas compressor is developed and the flow rate is estimated by varying the initial pressure from one to up to three atmospheric pressures. HFC134a is used as a gas which has high acoustic impedance compared to air.
日本流体力学会の論文
2004-08-09