Forced Synchronization of Periodic Oscillations in a Gas Column: Where is the Power Source?

被引：9

作者：

Yoshida, Takamasa ^{[1
]}

Yazaki, Taichi ^{[1
]}

Ueda, Yuki ^{[2
]}

Biwa, Tetsushi ^{[3
]}

机构：

[1] Aichi Univ Educ, Dept Phys, Kariya, Aichi 4488542, Japan

[2] Tokyo Univ Agr & Technol, Grad Sch Bioapplicat, Fuchu, Tokyo 1838538, Japan

[3] Tohoku Univ, Dept Mech Syst & Design, Sendai, Miyagi 9808579, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2013年 / 82卷 / 10期

关键词：

acoustic synchronization; power flux density; sound source; thermoacoustics;

D O I：

10.7566/JPSJ.82.103001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Self-sustained oscillations in a gas column induced by a temperature gradient are periodically perturbed by external forcing. In this study, a synchronization bifurcation diagram is mapped out and the power source required to sustain synchronized oscillations is identified using sound intensity measurements. We demonstrate that, even if small forcing entrains the natural frequency or if strong forcing completely suppresses the natural dynamics, the external forcing device is never the source of power; this source resides in the temperature gradient, which creates natural-frequency oscillations.

引用

页数：4

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