Computational Fluid Dynamic Investigation of Loss Mechanisms in a Pulse-Tube Refrigerator

Cryogenic Engineering Conference 2015

材料科学;物理学

Martin, K.^1 ; Esguerra, J.^2 ; Dodson, C.^3 ; Razani, A.^4

Applied Technology Associ., 1300 Britt St. SE, Albuquerque

NM

87123-3353, United States^1

Glacier Technical Solutions, LLC, El Paso

TX

79925, United States^2

Spacecraft Component Thermal Research Group, Air Force Research Labs Kirtland AFB, NM

87117-5776, United States^3

University of New Mexico, Albuquerque

NM

87131, United States^4

关键词: Correlation function;    Design and analysis;    Irreversible process;    Performance degradation;    Performance prediction;    Pulse tube cryocoolers;    Pulse tube refrigerators;    Refrigeration performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/101/1/012101/pdf
DOI  :  10.1088/1757-899X/101/1/012101

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In predicting Pulse-Tube Cryocooler (PTC) performance, One-Dimensional (1-D) PTR design and analysis tools such as Gedeon Associates SAGE® typically include models for performance degradation due to thermodynamically irreversible processes. SAGE®, in particular, accounts for convective loss, turbulent conductive loss and numerical diffusion "loss" via correlation functions based on analysis and empirical testing. In this study, we compare CFD and SAGE® estimates of PTR refrigeration performance for four distinct pulse-tube lengths. Performance predictions from PTR CFD models are compared to SAGE® predictions for all four cases. Then, to further demonstrate the benefits of higher-fidelity and multidimensional CFD simulation, the PTR loss mechanisms are characterized in terms of their spatial and temporal locations.