Observation of thermoacoustic shock waves in a resonance tube

Tetsushi Biwa, Kazuya Sobata, Shota Otake, Taichi Yazaki

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

This paper reports thermally induced shock waves observed in an acoustic resonance tube. Self-sustained oscillations of a gas column were created by imposing an axial temperature gradient on the short stack of plates installed in the resonance tube filled with air at atmospheric pressure. The tube length and axial position of the stack were examined so as to make the acoustic amplitude of the gas oscillations maximum. The periodic shock wave was observed when the acoustic pressure amplitude reached 8.3kPa at the fundamental frequency. Measurements of the acoustic intensity show that the energy absorption in the stack region with the temperature gradient tends to prevent the nonlinear excitation of harmonic oscillations, which explains why the shock waves had been unfavorable in the resonance tube thermoacoustic systems.

Original languageEnglish
Pages (from-to)965-968
Number of pages4
JournalJournal of the Acoustical Society of America
Volume136
Issue number3
DOIs
Publication statusPublished - 2014 Sep 1

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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