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Numerical simulations of transport processes in a pulse tube cryocooler: Effects of taper angle

机译:脉冲管低温冷却器中输送过程的数值模拟:锥角的影响

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摘要

A numerical model is developed for the prediction of the performance and transport characteristics in an orifice pulse tube refrigerator (OPTR). The OPTR is studied for a two specific geometries. In the first geometry (A), only the taper angle of the pulse tube is changed. In the second geometry (B), the taper angle of the pulse tube is varied along with the diameter of the hot heat-exchanger. The taper angle of the pulse tube is shown to have significant effects on the secondary streaming patterns observed in the pulse tube. Tapering the pulse tube improved the performance of the OPTR only for Geometry-B. In this case, suppression of velocity streaming is achieved in the warm end of the pulse tube.
机译:建立了用于预测孔口脉冲管制冷机(OPTR)的性能和传输特性的数值模型。研究了OPTR的两种特定几何形状。在第一几何形状(A)中,仅改变脉冲管的锥角。在第二几何形状(B)中,脉冲管的锥角随着热交换器的直径而变化。示出了脉冲管的锥角对在脉冲管中观察到的二次流模式具有显着影响。逐渐变细的脉冲管仅针对Geometry-B改善了OPTR的性能。在这种情况下,在脉冲管的热端实现了对速度流的抑制。

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