A computational approach for coupled 1D and 2D/3D CFD modelling of pulse Tube cryocoolers

[摘要] The physics behind Stirling-type cryocoolers are complicated. One dimensional (1D) simulation tools offer limited details and accuracy, in particular for cryocoolers that have non-linear configurations. Multi-dimensional Computational Fluid Dynamic (CFD) methods are useful but are computationally expensive in simulating cyrocooler systems in their entirety. In view of the fact that some components of a cryocooler, e.g., inertance tubes and compliance tanks, can be modelled as 1D components with little loss of critical information, a 1D-2D/3D coupled model was developed. Accordingly, one-dimensional - like components are represented by specifically developed routines. These routines can be coupled to CFD codes and provide boundary conditions for 2D/3D CFD simulations. The developed coupled model, while preserving sufficient flow field details, is two orders of magnitude faster than equivalent 2D/3D CFD models. The predictions show good agreement with experimental data and 2D/3D CFD model.

[发布机构] Georgia Tech Cryo Lab, G.W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta; GA; 30332, United States^1;Chart, Biomedical Division, Chart Inc., Troy; NY; 12188, United States^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] CFD modelling;CFD simulations;Computational approach;Coupled modeling;Inertance tube;Multi dimensional;Orders of magnitude;Pulse tube cryocoolers