Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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MODELING ON FLOW CHARACTERISTICS OF INERTANCE PULSE TUBE CRYOCOOLER

관성관 맥동관 극저온 냉동기의 유동 특성 모델링

  • Han, S.H. (Dept. of Aerospace Engineering, Sunchon Univ.) ;
  • Lee, K.H. (Dept. of Mechanical and Aerospace Engineering, Sunchon Univ.) ;
  • Choi, J.W. (Dept. of Mechanical and Aerospace Engineering, Sunchon Univ.) ;
  • Kim, J.S. (Dept. of Aerospace Engineering, Chosun Univ.)
  • 한성현 (순천대학교 우주항공공학과) ;
  • 이경환 (순천대학교 기계우주항공공학부) ;
  • 최종욱 (순천대학교 기계우주항공공학부) ;
  • 김재수 (조선대학교 항공우주공학과)
  • Received : 2014.06.03
  • Accepted : 2014.07.01
  • Published : 2014.09.30
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Abstract

The flow characteristics of inertance pulse tube cryocooler(IPTC) was investigated with a computational thermal fluid dynamics for the reciprocating flow in IPTC including the piston movement of linear compressor. Two dimensional axisymmetric modeling was applied for the flow in an IPTC with a clearance between the piston and cylinder wall of linear compressor. The pressure, velocity, and temperature distribution were examined for the steady state. These were compared with previous results to confirm the validity in the modeling and computational results. The leakage between piston and cylinder wall affect the cooling capacity seriously. The dependence on mesh numbers were also examined to obtain a proper mesh numbers to improve the accuracy of calculation, which showed significant effect on the results. The user-defined function was used for the process of compression and expansion of piston.

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References

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