Displacer Diameter Effect in Displacer Pulse Tube Refrigerator

[摘要] Gas driving displacer pulse tube refrigerators are one of the work recovery type of pulse tube refrigerators whose theoretical efficiency is the same as Stirling refrigerators'. Its cooling power is from the displacement of the displacer. Displace diameter, rod diameter and pressure drop of the regenerator influence the displacement, which are investigated by numerical simulation. It is shown that the displacement ratio of the displacer over the piston is almost not affected by the displacer diameter at the same rod diameter ratio, or displacer with different diameters almost has the same performance.

[发布机构] Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University, Cao'an Road 4800, Shanghai; 201804, China^1;Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Tongji University, Cao'an Road 4800, Shanghai; 201804, China^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Cooling power;Diameter effect;Diameter ratio;Displacement ratios;Pulse tube refrigerators;Stirling refrigerators;Theoretical efficiencies;Work recoveries