Study of a thermoacoustic prime mover below onset of self-oscillation

Anthony A. Atchley, Henry E. Bass, Thomas J. Hofler, Hsiao Tseng Lin

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

The frequency response of a thermoacoustic prime mover has been measured as a function of the mean gas pressure and temperature gradient across the prime mover stack. The quality factor Q and resonance frequency can be determined from the response. As the temperature gradient is increased, the Q increases, indicating a decrease in attenuation across the stack. At sufficiently large temperature differences (~ 300 K), the resonator goes into self-oscillation, indicating negative attenuation. Measurements are reported for helium and argon at pressures ranging from 170-500 kPa and temperature gradients ranging from zero to that required for onset of self-oscillation. The results are explained in terms of a counterpropagating, plane-wave analysis, based on techniques commonly used in porous media investigations. In general, the predictions of the analysis are in good agreement with experiment. The predictions of Q and the change in resonance frequency with mean gas pressure are within approximately 5% and 0.4% of measured values for the no temperature gradient cases. In the cases where temperature gradients are present, the agreement is quite good for the two highest mean pressures reported (370 and 500 kPa). There are some noticeable discrepancies at the lowest pressure (170 kPa). The reasons for these discrepancies are unknown.

Original languageEnglish (US)
Pages (from-to)734-743
Number of pages10
JournalJournal of the Acoustical Society of America
Volume91
Issue number2
DOIs
StatePublished - Jan 1 1992

Fingerprint

self oscillation
temperature gradients
gas pressure
attenuation
gas temperature
predictions
pressure gradients
frequency response
Onset
Oscillation
Temperature
Q factors
plane waves
low pressure
resonators
helium
argon
gradients

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

Cite this

Atchley, Anthony A. ; Bass, Henry E. ; Hofler, Thomas J. ; Lin, Hsiao Tseng. / Study of a thermoacoustic prime mover below onset of self-oscillation. In: Journal of the Acoustical Society of America. 1992 ; Vol. 91, No. 2. pp. 734-743.
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Study of a thermoacoustic prime mover below onset of self-oscillation. / Atchley, Anthony A.; Bass, Henry E.; Hofler, Thomas J.; Lin, Hsiao Tseng.

In: Journal of the Acoustical Society of America, Vol. 91, No. 2, 01.01.1992, p. 734-743.

Research output: Contribution to journalArticle

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