Share

Computational fluid dynamics simulations of an orifice type pulse tube refrigerator: Effects of operating frequency.

Author(s) : ANTAO D.S., FAROUK B.

Type of article: Article

Summary

A numerical study is reported here for the investigation of the fundamental flow and heat transfer processes found in an orifice type pulse tube refrigerator (OPTR). The OPTR is driven by a cyclically moving piston at one end of the system with helium as the working fluid. The regenerator and the various heat exchangers are modeled as porous media and a thermal non-equilibrium model is applied in these regions. The system is studied for different operating frequencies of the driver piston. The simulations reveal interesting steady-periodic flow patterns that develop in the pulse tube due to the fluctuations caused by the piston and the presence of the inertance tube. The predicted secondary-flow recirculation patterns in the pulse tube are found to affect the OPTR performance. When the secondary-flow patterns are well-developed, they help isolate the cold and hot ends of the pulse tube and create a thermal buffer zone at the center of the pulse tube, enhancing the performance of the OPTR.

Details

  • Original title: Computational fluid dynamics simulations of an orifice type pulse tube refrigerator: Effects of operating frequency.
  • Record ID : 30001167
  • Languages: English
  • Source: Cryogenics - vol. 51 - n. 4
  • Publication date: 2011/04
  • DOI: http://dx.doi.org/10.1016/j.cryogenics.2011.02.001

Links


See other articles in this issue (5)
See the source

Indexing