Periodic acoustic pulse generation by mode locked thermoacoustic oscillator

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This study documents periodic acoustic pulse generation by heat in a thermoacoustic oscillator system constructed from a gas-filled acoustic resonance tube having a porous medium called a stack. When the system's dissonancy was enhanced by a local cross-sectional area change in the resonance tube, the periodic pulsed state was turned to a quasiperiodic state. This observation suggests that the acoustic pulse was created through the mode-locking of internal oscillation modes. Propagation of pulsed acoustic intensity in the resonance tube was evidenced by simultaneous measurements of acoustic pressure and axial acoustic particle velocity of the gas.

Original languageEnglish
Pages (from-to)2310-2315
Number of pages6
JournalJournal of the Acoustical Society of America
Issue number4
Publication statusPublished - 2021 Oct 1


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