Thursday August 29, 2019 from 13:30 to 15:10
Numerical investigation of pulse tube refrigerator with inertance tube-gas reservoir phase modulation
Wenbin Wang1, Liang Chen1, Menglin Liang2, Yanjie Liu2, Shuangtao Chen1, Yu Hou1.
1Xi'an Jiaotong University, Xi'an, People's Republic of China; 2Technical Institute of Physics and Chemistry, Beijing, People's Republic of China
In this paper, a three-dimensional numerical model is developed for the major parts of PTR, and the oscillating flow through the inertance tube is described using a one-dimensional model. The sinusoidal pressure wave is employed as boundary condition at the warm end of the regenerator. The combination of the 3D and 1D models can help to improve the model accuracy and reduce the computation time. The k-ω turbulent model with SIMPLEC scheme is employed to deal with the oscillating compressible flow. The non-equilibrium heat transfer process with porous medium model is used for the regenerator. The model is validated against the experimental data of PTR with a frequency of 34 Hz and a cold end temperature of 24 K. Based on the simulation results, the influence of operation variables and geometrical parameters on the coefficient of performance and cooling capacity is analyzed, which can provide practical guidelines for the PTR design.