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Hydrodynamic parameters of pulse tube or Stirling cryocooler regenerators for periodic flow.

Author(s) : CHA J. S., GHIAASIAAN S. M., HARVEY J. P., et al.

Summary

The preliminary results of a research program on the measurement and correlation of hydrodynamic parameters of some widely-used cryocooler regenerator fillers under periodic oscillatory flow conditions are presented. An experimental apparatus consisting of test sections for the measurement of lateral (radial) permeability and Forchheimer coefficients is used. The test section for the radial hydrodynamic parameter measurements is annular. It is connected to a compressor through its inner boundary and to a constant-volume chamber through its outer boundary. The instrumentation includes a function generator, data acquisition system, and pressure transducers. Time histories of local static pressures at points near the entrance and exit of the porous structure are measured under steady-periodic conditions. A CFD-assisted methodology is then applied for the analysis and interpretation of the measured data. The permeability and Forchheimer parameter values obtained in this way are then correlated in terms of relevant dimensionless parameters.

Details

  • Original title: Hydrodynamic parameters of pulse tube or Stirling cryocooler regenerators for periodic flow.
  • Record ID : 2008-1068
  • Languages: English
  • Publication date: 2006/06/14
  • Source: Source: Proc. 14th int. Cryocooler Conf., Annapolis, MD
    397-403; fig.; tabl.; 10 ref.

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