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在对脉冲管制冷机的内部过程进行分析之后指出:热力学非对称效应和热声效应是这种制冷机中同时存在的两种重要的物理机制,其中热端调相造成的脉冲管冷端热力学非对称效应是产生制冷效应的主要原因,而气体和固体相互作用产生的热声效应实现了热量的输运,两种效应综合起来决定了脉冲管制冷机的性能。定性地分析了这两种效应及它们的相互关系,为改进脉冲管制冷机的模拟方法打下了基础。还指出,不仅脉冲管冷端存在热力学非对称效应,在脉冲管的热端和回热器的热端也存在着热力学非对称效应。
After analyzing the internal process of the pulse tube refrigerator, it is pointed out that thermodynamic asymmetry and thermoacoustic effects are two important physical mechanisms that coexist in this kind of refrigerator. The thermodynamic The asymmetric effect is the main reason for the refrigeration effect, and the thermoacoustic effect caused by the interaction between the gas and the solid body realizes the heat transport. The two effects combine to determine the performance of the pulse tube refrigerator. The qualitative analysis of these two effects and their correlations has laid the foundation for improving the simulation method of pulse tube refrigerator. It is also pointed out that not only the thermodynamic asymmetry effect exists at the cold end of the pulse tube, but also the thermodynamic asymmetry at the hot end of the pulse tube and the hot end of the regenerator.