Abstract: An experimental system of single wave tube was set up. The changes of injection gas and reflected wave intensity were studied systematically under different conditions with a special cold-saving packing placed in the end section of an accepting tube. The influence of weakened wave energy on refrigerating efficiency was investigated.By placing the cold-saving packing in the accepting tube,refrigerating efficiency could be increased by up to 5%. A mathematical model was established to describe the process of the flow in the tube and the heat transfer across tube wall.Numerical simulation was conducted on the process in the accepting tube.The measured values are in good agreement with the simulation results. The results of the study could be used for the restructuring, design and optimization of wave tubes.

Key words:

气波管, 制冷效率, 波系

摘要： 建立了一套气波单管机实验装置，系统地研究了不同实验条件下接受管端部加入一种特制的蓄冷填料后入射气体与反射激波强度的变化，考察了削弱激波能量对制冷效率的影响程度。利用这种方法对现有气波制冷机进行改造比较简单，制冷效率提高幅度可达5%左右。建立了管内非定常流动与管壁传热数学模型，对接受管内激波的流动进行了数值模拟，计算结果与实验测量值趋势相同，可为气波制冷机的改造、设计及优化提供理论上的指导。

关键词:

气波管, 制冷效率, 波系