Abstract: 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.

摘要： 提出了并联通道密度波型不稳定性的非线性数学模型,经计算发现,在所研究的范围内,系统的稳定性与初始扰动的幅度无关,仅取决于运行条件。计算结果与实验结果相吻合。