SUCRA(さくら: Saitama University Cyber Repository of Academic Resources)は、埼玉大学に在籍する研究者の学術雑誌論文、紀要論文、科学研究費補助金成果報告書、学位論文、研究発表プレゼン資料などを登録し、広く世界に発信しています。 埼玉大学に在籍する皆様は、著作物をSUCRAを通じて発信することができます。詳しくは「成果物の登録方法」をご覧ください。
Graduate School of Science and Engineering, Saitama University
雑誌名
日本機械学會論文集. B編
巻
68
号
669
ページ
1352 - 1359
発行年
2002
年月次
2002-05
出版者名
社団法人日本機械学会
ISSN
03875016
抄録
When an air-column in an axi-symmetric closed tube with constant cross-section is driven by a piston vibrating at resonant frequency at one end, finite amplitude standing wave is induced in the tube. The increase of oscillation amplitude in the tube brings about the nonlinear phenomena of wave motion, such as mean pressure distribution along the tube axis, acoustic streaming, and thermoacoustic effect. The large amplitude pressure fluctuation and the thermoacoustic effect generated by finite amplitude standing wave induced in the closed tube are principal physical phenomena in the engineering applications of the finite amplitude wave motion to acoustic compressor and thermoacoustic refrigerator. In order to develop these practical systems, it is essential to realize large amplitude oscillation in the tube. However, the increase of oscillation amplitude is limited by the acoustic saturation caused by nonlinear wave distortion which steepens wave front to shock wave. In order to avoid the acoustic saturation, axi-symmetric tubes with cross-sectional area contraction toward the closed end are used. Basic characteristics of wave motion in the tubes with area change have been discussed with linear acoustic theory. Finite amplitude wave motions generated in different shape tubes have been analyzed numerically and compared with experimental results. Fundamental knowledge and estimation for the development of the acoustic compressor have been given from the results obtained.
断面積が変化する軸対称閉管内の有限振幅定在波(流体工学, 流体機械)
A3000053.pdf
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SUCRAの概要
