TY - JOUR
T1 - Forced synchronization of periodic oscillations in a gas column
T2 - Where is the power source?
AU - Yoshida, Takamasa
AU - Yazaki, Taichi
AU - Ueda, Yuki
AU - Biwa, Tetsushi
PY - 2013/10
Y1 - 2013/10
N2 - 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.
AB - 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.
KW - Acoustic synchronization
KW - Power flux density
KW - Sound source
KW - Thermoacoustics
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U2 - 10.7566/JPSJ.82.103001
DO - 10.7566/JPSJ.82.103001
M3 - Article
AN - SCOPUS:84884992029
VL - 82
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 10
M1 - 103001
ER -