Two - phase flow instability in parallel boiling channels are often encountered in a wide range of engineering systems

such as nuclear reactor

steam power plant

special heat exchanger

steam generator

process equipment and so on.Most authors have done experimental studies and theoretical analysis for two - phase flow instability. The research work almost focuses on single tube. There are much less for parallel channels. Based on the experimental results for high pressure steam - water two - phase flow instability

the non - linear mathematical model of two - phase flow instability in parallel channels are proposed in this paper. The calculation results show that system stability is independent of magnitude and nature of initial disturbance but is dependent on the operating condition. The calculated results agree well with the experimental data.