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  • Komparatistik. Außereuropäische Sprachen/Literaturen  (4)
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Fachgebiete(RVK)
  • Komparatistik. Außereuropäische Sprachen/Literaturen  (4)
RVK
  • 1
    Online-Ressource
    Online-Ressource
    The heat transfer coefficient between stack and heat exchanger as a function of thermal penetration depth.
    Acoustical Society of America (ASA) ; 1996
    In:  The Journal of the Acoustical Society of America Vol. 99, No. 4_Supplement ( 1996-04-01), p. 2559-2574
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 99, No. 4_Supplement ( 1996-04-01), p. 2559-2574
    Kurzfassung: The heat transfer coefficient between two elements of a thermoacoustic device is defined as being the ratio between the rate of heat flow between them and the temperature difference occurring at the interface. Previous experiments have demonstrated that this quantity is proportional to the amplitude of acoustic oscillation. For stack and heat exchanger duct widths that are comparable to the thermal penetration depth, the heat transfer coefficient was found to be equal to that predicted by a theory based on the elements of the engine being perfect heat exchangers. Results of experimental measurements of the variation of heat transfer coefficient as a function of frequency will be presented. Increasing the frequency reduces the thermal penetration depth allowing the effects of partial thermal contact within the elements to be evaluated. These results will be compared to attempts to build theoretical models of the heat exchange process.
    Materialart: Online-Ressource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.415011
    RVK:
    EQ 1000
    Sprache: Englisch
    Verlag: Acoustical Society of America (ASA)
    Publikationsdatum: 1996
    ZDB Id: 1461063-2
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 2
    Online-Ressource
    Online-Ressource
    Temperature discontinuities between elements of thermoacoustic devices
    Acoustical Society of America (ASA) ; 1997
    In:  The Journal of the Acoustical Society of America Vol. 102, No. 6 ( 1997-12-01), p. 3355-3360
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 102, No. 6 ( 1997-12-01), p. 3355-3360
    Kurzfassung: Significant differences in temperatures have been observed between adjoining elements of thermoacoustic prime movers [G. W. Swift, J. Acoust. Soc. Am. 92, 1551–1563 (1992)]. A simple description of the interelement heat transfer process based on the existence of this temperature difference is given. The central assumption of this approach is that the heat transfer process is sufficiently rapid that it is completed in less than the dwell time that the fluid spends in either element. Experimental measurements of the heat transfer coefficient between elements is shown to yield results close to the prediction of this complete heat exchange theory. Predictions are also compared to those based on the heat transfer description put forward by Swift [J. Acoust. Soc. Am. 92, 1551–1563 (1992)] .
    Materialart: Online-Ressource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.419578
    RVK:
    EQ 1000
    Sprache: Englisch
    Verlag: Acoustical Society of America (ASA)
    Publikationsdatum: 1997
    ZDB Id: 1461063-2
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 3
    Online-Ressource
    Online-Ressource
    A new approximation method for thermoacoustic calculations
    Acoustical Society of America (ASA) ; 1998
    In:  The Journal of the Acoustical Society of America Vol. 103, No. 5 ( 1998-05-01), p. 2395-2402
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 103, No. 5 ( 1998-05-01), p. 2395-2402
    Kurzfassung: In many cases, it is convenient to have approximate relations to evaluate thermoacoustic gain and efficiency. G. W. Swift [J. Acoust. Soc. Am. 84, 1145–1180 (1988)] has provided such relations for short stacks in a standing wave. This paper describes an approximation method based on a finite difference form of the thermoacoustic equations and provides results for thermoacoustic engines or refrigerators for both standing and traveling waves. The short stack assumption is retained. The method is limited at present to linear temperature gradients across the stack. The calculations are compared to measurements and in the appropriate limits to Rott’s boundary conditions for a temperature discontinuity [N. Rott, Adv. Appl. Mech. 20, 135–175 (1980)] . The approximation is applied to both thermoacoustic prime movers and thermoacoustic refrigerators.
    Materialart: Online-Ressource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.422758
    RVK:
    EQ 1000
    Sprache: Englisch
    Verlag: Acoustical Society of America (ASA)
    Publikationsdatum: 1998
    ZDB Id: 1461063-2
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 4
    Online-Ressource
    Online-Ressource
    Investigation of parametric drive of a longitudinal gas-filled resonance tube
    Acoustical Society of America (ASA) ; 1996
    In:  The Journal of the Acoustical Society of America Vol. 99, No. 2 ( 1996-02-01), p. 725-729
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 99, No. 2 ( 1996-02-01), p. 725-729
    Kurzfassung: High power drives for thermoacoustic refrigerators are being investigated by several groups. Theoretical calculations have been performed of the feasibility of parametrically driving a longitudinal resonance tube by uniformly modulating the temperature of the gas with a high-power laser. Parametric drives are promising since the drive mechanism is distributed over the entire volume of gas and because the response may become large before saturation occurs. Although it is demonstrated that laser drive is not a practical means of high-power drive for longitudinal resonators, much interesting physics has been considered in the analysis of the proposed system and is discussed.
    Materialart: Online-Ressource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.414672
    RVK:
    EQ 1000
    Sprache: Englisch
    Verlag: Acoustical Society of America (ASA)
    Publikationsdatum: 1996
    ZDB Id: 1461063-2
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Online-Ressource
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