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Abstract
An improved numerical model has been developed for simulating the oscillating flow and detailed dynamic performance of a pulse tube cryocooler. The governing equations that include the pressure gradient, inertia, viscous, and convection terms are based on the conservation of mass, energy, and momentum for compressible oscillating flow. Good agreement has been found between the predicted results and the experimental data. Detailed time-dependent axial wall temperature distribution, transient gas temperature, mass flow rate, and dynamic pressure variations in the oscillation pulse tube cryocooler have been obtained. The effects of the orifice and double-inlet tubes on the dynamic parameters and refrigeration performance of the pulse tube cryocooler are also presented.
Notes
Address correspondence to Prof. Yonglin Ju, Cryogenic Laboratory, Chinese Academy of Sciences, P.O. Box 2711, Beijing, 100080, China.
