脉冲管制冷机热端小孔调相机构的实验研究

Experimental Research on Phase Adjusting Orifice at the Hot End of Pulse Tube Refrigerator

】针对小孔型脉冲管制冷机热端调相机构进行研究，采用针形阀或对称喷嘴及长颈管作为小孔在Ｇ－Ｍ型脉冲管制冷机上进行实验。从目前的实验结果看，采用针形阀和长颈管能得到最好的结果，采用对称喷嘴的效果不如针形阀。

Pulse tube refrigerator has undergone great development in recent years. To find better and more reliable and simple phase shift mechanism at the hot end of pulse tube refrigerator, several devices have been proposed, two of which are symmetric nozzle and long neck tube. In this article, experiments have been done to compare performance of these two devices with pin valve.