Abstract
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 language | English |
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| Pages (from-to) | 2310-2315 |
| Number of pages | 6 |
| Journal | Journal of the Acoustical Society of America |
| Volume | 150 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2021 Oct 1 |