低温蓄冷器流动特性的理论分析和实验研究 第一部分:理论模型分析及实验修正

Theoretical And Experimental Study Of The Flow Characteristics For A Regenerator Under Low Temperature Part Ⅰ: Theoretical Analysis And Experimental Revision

蓄冷器是脉冲管制冷机等回热式制冷机的关键部件 ,其性能的好坏将直接影响制冷机的性能和效率。交变流动蓄冷器内部热量和动量的传输及转换过程是传热学、流体力学和热力学耦合在一起的复杂问题。文中从声电类比出发 ,提出了交变流动蓄冷器声阻抗分析方法 ,进行了初步的理论发析 ,并通过实验作了进一步的修正。该模型是建立在波动分析基础上的 。

As a key component, the regenerator plays an important role in the refrigeration performance of the pulse tube refrigerator and other regenerative cryocoolers. The transmission and conversion process of the heat and momentum in the regenerator is very complex. It is a problem which relates to heat transfer, hydrodynamics and thermodynamics. In this paper, we begin with the analogy of acoustics and electrics, and then bring forward an impedance model for the regenerator under oscillating flow. After using this model for the fundamental theoretical analysis, we revise this model by experimental data. This model is based on the wave analysis and can explain relative experimental phenomena and results.