低温制冷机和热声机中直流问题的研究

脉管制冷机中的直流流动和热声机械中的直流流动都是当前研究领域的热点问题 ,消除或积极利用直流流动是提高脉管制冷性能和热声机械效率的有效途径之一。文中介绍了几种主要的直流类型 ,并从实验和理论两方面揭示了直流现象产生的原因及其抑制、消除或积极利用的方法。

Investigation of Streaming In Pulse Tube Refrigerator And Thermoacoustic Engine

Investigation of the streaming in pulse tube refrigerator is a key point in the current research of PTR. Elimination and utilization of streaming in PTR contribute to the high and reliable performance of PTR. Based on the different forming mechanisms, two primary streaming are concerned in this paper. From the views of theory and experiment, the reasons of generating of the streaming are illuminated, and the methods of elimination?restraint and utilization of streaming are also presented.