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.