| 摘要 |
Several layers of fine mesh screen (38, 40, 42) are diffusion bonded together to form a rigid disc or plate that is self supporting and is a flow smoother at the ends of a pulse tube expander (10). Layers range from fine screens on the surface facing the pulse tube (24, 26) to coarser screens that provide structural support without significantly adding to pressure drop across the screen assembly. The flow smoother (12, 12', 14, 14') is typically used in series with a heat exchanger at the warm end that rejects heat to ambient from the gas of the pulse tube and a heat exchanger at the cold end (20, 22) that receives heat from the load being cooled.
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