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

Cryogenic Engineering Conference 2017

材料科学;物理学

Fang, T.^1 ; Spoor, P.S.^2 ; Ghiaasiaan, S.M.^1

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

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

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012172/pdf
DOI  :  10.1088/1757-899X/278/1/012172

学科分类：材料科学（综合）

来源: IOP

【 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.