CFD simulation of the gas flow in a pulse tube cryocooler with two pulse tubes

[摘要] In this paper, in order to instruct the next optimization work, a two-dimension Computational Fluid Dynamics (CFD) model is developed to simulate temperature distribution and velocity distribution of oscillating fluid in the DPTC by individual phase-shifting. It is found that the axial temperature distribution of regenerator is generally uniform and the temperatures near the center at the same cross setion of two pulse tubes are obviously higher than their near wall temperatures. The wall temperature difference about 0-7 K exists between the two pulse tubes. The velocity distribution near the center of the regenerator is uniform and there is obvious injection stream coming at the center of the pulse tubes from the hot end. The formation reason of temperature distribution and velocity distribution is explained.

[发布机构] Institute of Cryogenics and Electronics, Hefei; 230043, China^1;Provincial Laboratory of Cryogenics and Refrigeration, Hefei; 230043, China^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] CFD simulations;Computational fluid dynamics modeling;Oscillating fluids;Phase-shifting;Pulse tube cryocoolers;Two pulse tubes;Two-dimension;Wall temperatures