Accession Number : ADA186889

Title :   Investigation of Thermoacoustic Heat Transport Using a Thermoacoustic Couple.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Muzzerall, Michael L

PDF Url : ADA186889

Report Date : Sep 1987

Pagination or Media Count : 75

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.

Descriptors :   *ACOUSTIC ARRAYS, *ACOUSTIC FIELDS, *THERMODYNAMICS, *THERMOCOUPLES, *TRANSDUCERS, ACOUSTICS, AMPLITUDE, ARGON, GRADIENTS, HEAT TRANSFER, HELIUM, MEASUREMENT, PLATES, PRESSURE, RESONANCE, TEMPERATURE GRADIENTS, THINNESS, TUBES, THESES, SIZES(DIMENSIONS)

Subject Categories : Acoustics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE