| Title |
Enthalpy Flow Loss by Steady Mass Streaming in Pulse Tube Refrigerators |
| Keywords |
Pulse tube refrigerator ; 맥동관냉동기 ; Pulse tube ; 맥동관 ; Steady mass streaming ; 정상상태 질량흐름 ; Enthalpy flow loss ; 엔탈피손실 |
| Abstract |
Effects of the taper angle and the angular velocity of a pulse tube on the enthalpy flow loss associated with the steady mass streaming were analyzed by two-dimensional analysis of a pulse tube with variable cross-section. It was shown that the steady mass flux can lead to a large steady second-order temperature. The enthalpy flow loss associated with the steady mass streaming increases as the angular velocity increases. For a pulse tube where the viscous penetration depth is far thinner than the inner radius, the enthalpy flow loss can be significantly reduced by tapering the pulse tube since both the steady mass flux and the steady second-order temperature decrease as the taper angle increases. |