An Adiabatic Model for a Two-Stage Double-Orifice Pulse Tube Refrigerator to Reach Liquid Helium Temperatures
An adiabatic model for 4K two-stage double-orifice pulse tube refrigerator is proposed to study the detailed fluid dynamics within the pulse tube. Numerical predictions also reveal the energy transportation in the pulse tube. The calculated results show that the double-orifice configuration developed by the authors has an obvious effect by increasing the time-averaged enthalpy flow at the cold end of the low temperature stage pulse tube while also decreasing irreversible losses compared with the double-inlet version.
KeywordsMass Flow Rate Open Ratio Temperature Oscillation Liquid Helium Temperature Temperature Wave
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