Transient analysis of single stage GM type double inlet pulse tube cryocooler

Cryogenic Engineering Conference 2015

材料科学;物理学

Gujarati, P.B.^1 ; Desai, K.P.^1 ; Naik, H.B.^1 ; Atrey, M.D.^2

S v National Institute of Technology, Surat

395007, India^1

Indian Institute of Technology Bombay, Mumbai

400076, India^2

关键词: Governing equations;    Initial and boundary conditions;    Operating frequency;    Operating parameters;    Physical process;    Pressure waveforms;    Pulse tube cryocoolers;    Regenerator matrices;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/101/1/012033/pdf
DOI  :  10.1088/1757-899X/101/1/012033

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Transient analysis of single stage GM type double inlet pulse tube cryocooler is carried out using a one dimensional numerical model based on real gas properties of helium. The model solves continuity, momentum and energy equation for gas and solid to analyse the physical process occurring inside of the pulse tube cryocooler. Finite volume method is applied to discretize the governing equations with realistic initial and boundary conditions. Input data required for solving the model are the design data and operating parameters viz. pressure waveform from the compressor, regenerator matrix data, and system geometry including pulse tube, regenerator size and operating frequency for pulse tube cryocooler. The model investigates the effect of orifice opening, double inlet opening, pressure ratio, system geometry on no load temperature and refrigeration power at various temperatures for different charging pressure. The results are compared with experimental data and reasonable agreement is observed. The model can further be extended for designing two stage pulse tube cryocooler.