惯性管型脉管内气体振荡制冷机理的分子动力学模拟  

Molecular Dynamics Simulation of Gas Oscillation Refrigeration Mechanism in Inertia Tube Pulse Tube

作　　者：牛世哲 祁影霞[1] 车闫瑾 潘帅 刘雅丽 张凡 

机构地区：[1]上海理工大学能源与动力工程学院,上海

出　　处：《建模与仿真》2020年第1期87-94,共8页Modeling and Simulation

基　　金：上海市动力工程多相流与传热重点实验室项目(13DZ2260900)。

摘　　要：运用分子动力学模拟的方法,研究了惯性管型脉管内振荡的热力学机理。结果表明,与基本型脉管相比,惯性管型脉管温度,压力和质量流的相位均延迟,质量流和压力波之间的相位差减小,提高了脉管的制冷效率。同时,热端附近的质量流振幅有所减小,而冷端附近质量流振幅有所增大。此外,惯性管内气体温度有所降低。仿真结果有助于了解惯性管型脉管内部振荡的热力学机理。In this paper, the molecular dynamics simulation method is used to study the thermodynamic mechanism of the oscillation in the inertial tube (IT). The results show that the temperature, pressure and massflow phase of the inertia tube are delayed, the phase difference between the massflow and pressure wave is reduced, and the cooling efficiency of the pulse tube is improved. At the same time, the amplitude of massflow near the hot end decreases, while that near the cold end increases. In addition, the gas temperature in the IT is reduced. The simulation results are helpful to understand the thermodynamic mechanism of the internal oscillation of the IT.

关 键 词：分子动力学模拟 惯性管 脉管 

分 类 号：R73[医药卫生—肿瘤]