抄録
Numerical simulation of viscous compressible flow in basic pulse tube refrigerator was performed to investigate the frequency characteristic. Transient axisymmetric two-dimensional equations of continuity, momentum and energy were solved utilizing the TVD scheme. A physical model combining the pulse tube with wall and regenerator is used for numerical simulation and the dimensions of this model are much the same as one of Gifford's model in which the lowest achieved temperature of 165K was obtained. In this paper, we analyzed the behavior of temporal average gas temperatures during the initial 10 cycles, and the change in gas temperature during a cycle in the first cycle for various frequencies.
