Forced synchronization of periodic oscillations in a gas column: Where is the power source?

Takamasa Yoshida, Taichi Yazaki, Yuki Ueda, Tetsushi Biwa

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number103001
Journaljournal of the physical society of japan
Volume82
Issue number10
DOIs
Publication statusPublished - 2013 Oct 1

Keywords

  • Acoustic synchronization
  • Power flux density
  • Sound source
  • Thermoacoustics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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