Abstract The force exerted on the piston of a linear motor driving an orifice pulse tube is analyzed using linearized theory. First, the case of a pulse tube without reservoir is considered. It is found that there are two possible resonances, corresponding to a very small and a very large orifice conductance, respectively. Such resonances can be used to reduce the amplitude of the current provided to the linear motor, and hence to reduce associated ohmic losses. Use of the resonances thus helps to maximize the power delivered to the pulse tube. An expression is derived for the dissipation in the various chambers associated with heat losses to the walls. Experimental results obtained for the amplitude of the piston force indicate that there is a large influence of turbulent effects on thermal diffusivity. The analysis is extended to the case with regenerator. It is found that large temperature ratiosacross the regenerator as well as heat losses to the walls tend to decrease the piston resonance effect.


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    Title :

    Piston Resonance in the Orifice Pulse Tube


    Contributors:
    Boer, P.C.T. (author) / Duval, J.-M. (author) / Charles, I. (author) / Duband, L. (author)

    Published in:

    Publication date :

    2003-01-01


    Size :

    10 pages




    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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