Numerical research on nitrogen spontaneous condensation in converging-diverging nozzle

被引：0

作者：

Sun, Wan ^{[1
]}

Niu, Lu ^{[1
]}

Lai, Tianwei ^{[1
]}

Liu, Liqiang ^{[2
]}

Hou, Yu ^{[1
]}

机构：

[1] State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an,710049, China

[2] Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing,100190, China

来源：

Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2015年 / 49卷 / 04期

关键词：

2-D numerical simulation - Converging-diverging nozzles - Equilibrium condensation - Mass fraction distribution - Non equilibrium - Non-equilibrium condensation - Redlich Kwong state equation - Spontaneous condensation;

D O I：

10.7652/xjtuxb201504021

中图分类号：

学科分类号：

摘要：

Assuming a homogeneous flow without velocity slip between gas and liquid phases, 2-D numerical simulation for predicting nitrogen expansion flow with spontaneous condensation in a converging-diverging nozzle is accomplished via the non-equilibrium model of CFX. The mass transfer between two phases is calculated with the classical nucleation model and the standard Redlich Kwong state equation. The magnitude of nucleation rate, pressure and condensate mass fraction distributions, and condensation onset are comparatively analyzed to verify the validation of the model. Compared with the adiabatic expansion without condensation, the flow is heated by the latent heat and thermal conductivity between gas and liquid phases to heighten pressure and lower Mach number. A comparison between equilibrium condensation model and non-equilibrium condensation model shows better prediction of the latter for nitrogen expansion with spontaneous condensation. ©, 2015, Xi'an Jiaotong University. All right reserved.

引用

页码：130 / 133