Based on the reliable code, parametric study will be performed to further reveal the working mechanism and the influencing factors for PTR, hence improvement methods can be put forward.

• 在此基础上，对影响脉管制冷机性能的因素进行系统的分析，进一步查明其工作机理，影响因素，为提高现有脉管制冷机的性能提出切实可行的措施。