Pulse Tube Coolers with an Inertance Tube: Theory, Modeling, and Practice
We have studied the advantages to be gained by replacing the orifice of a pulse tube cooler with an inertance tube—a long thin tube that introduces the possibility for additional phase shift between pressure and mass flow in the pulse tube section. A case for using an inertance tube is made by employing an electrical analogy, where the ‘inductance’ added by the inertance tube allows for an improved power transfer efficiency at the cold end of the pulse tube. Detailed computer modeling of pulse tube systems with inertance tubes confirms these advantages. Comparison between a laboratory cooler with an orifice and with two inertance tubes is presented; the inertance tubes yield dramatic improvements over the use of the orifice.
KeywordsPressure Ratio Pulse Tube Cooling Efficiency Electrical Analogy Orifice Version
Unable to display preview. Download preview PDF.
- 1.S. W. Zhu, S. L. Zhou, N. Yoshimura and Y. Matsubara, Phase shift effect of the long neck tube for the pulse tube refrigerator, Proceedings of the 9th International Cryocoolers Conference, Waterville Valley, New Hampshire, June 1996, p. 269.Google Scholar
- 2.D. L. Gardner and G. W. Swift, Use of inertance in orifice pulse tube refrigerators, Cryogenics (to be published).Google Scholar
- 4.Pat R. Roach and Ali Kashani, A Simple modeling program for orifice pulse tube coolers, Proceedings of the 9th International Cryocoolers Conference, Waterville Valley, New Hampshire, June 1996, p. 327.Google Scholar
- 5.David M. Eckmann and James B. Grotberg, Experiments on transition to turbulence in oscillatory pipe flow, J. Huid Mech. 222:329 (1991).Google Scholar