Investigation of Thermoacoustic Heat Transport Using a Thermoacoustic Couple.
Abstract
The results of measurements of thermoacoustically generated temperature gradients in short, thin plates located in a resonant tube are reported. The temperature gradient results from a heat flow generated by the acoustic field. Measurements, at both axial and transverse positions in the tube, are made for pressure amplitudes ranging from approximately 145 dB to 162 dB re 20 uPa (rms), in argon and helium, for single plates and stacks of up to five plates having separations from approximately 4 to 40 thermal penetration depths. The results are compared to predictions based upon a theory by Wheatley and others (J. Wheatley, et al., Journal of the Acoustical Society of America, Vol. 74, pp. 153-170, 1983). For pressure amplitudes below 150 dB, the measurements agree with theory. At higher pressure amplitudes, the agreement diminishes. It is concluded that non-thermal effects are responsible for the discrepancies. Keywords: Acoustics, Thermoacoustics, Thermoacoustic heat transport.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1987
- Accession Number
- ADA186889
Entities
People
- Michael L. Muzzerall
Organizations
- Naval Postgraduate School