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이호진,채왕병,정은수,Lee, H.J.,Chae, W.B.,Jeong, E.S. 대한설비공학회 1997 설비공학 논문집 Vol.9 No.2
Steady components and unsteady components of second-order velocity and temperature within pulse tube refrigerators were obtained. Second-order solutions were obtained from the first-order solutions of continuity, momentum and energy equations, assuming that the amplitude of the piston motion is small. The axial temperature gradient was considered in the analysis. The flow direction of the streaming was consistent with previous experimental observations. Effects of axial temperature gradient on secondary flow and second-order temperature were shown.