Low temperature differential thermoacoustic Stirling engine

Tetsushi Biwa, Daichi Hasegawa, Taichi Yazaki

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)


To what extent can we lower the critical temperature ratio (CTR) necessary to start a thermoacoustic engine? We present an experimental method for predicting the CTR before the temperature ratio arrives at it using quality factor measurements. Based on the experimental quality factors, we tried to decrease the CTR of a thermoacoustic Stirling engine consisting of a looped tube and a branch resonator. Installation of the multiple regenerators at suitable positions can markedly enhance acoustic power production while overcoming energy dissipation. Results show that the CTR is decreased from 1.76 to 1.19 using five differentially heated regenerators.

Original languageEnglish
Article number034102
JournalApplied Physics Letters
Issue number3
Publication statusPublished - 2010 Jul 19

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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