基于析因分析的超临界水自然循环流动稳定性研究

Research of Supercritical Water Flow Instability under Natural Circulation Based on Factorial Analysis

超临界水自然循环流动稳定性的研究对反应堆安全有重要意义。通过析因分析方法,分析不同因素及其因素间交互作用对自然循环流动稳定边界的影响。研究发现:对于流动稳定性,效应C(入口阻力系数)影响所占的百分比贡献率最大,约70.89%;其次是效应AB(加热段长度和入口温度交互作用)的影响,其百分比贡献率占到13.26%;之后是效应A(加热段长度)的影响,其百分比贡献率为12.32%。在对脉动周期的影响中,效应A(加热段长度)的百分比贡献率最大,为68.47%;其次为效应C的影响,其百分比贡献率为24.04%。其他因素及其之间的交互作用效应对稳态流量和脉动周期的影响可以忽略不计。

The supercritical water flow instability under natural circulation is important to the safety of the reactor. By the method of factorial analysis, the effects of different factors and the factor interaction on the natural circulation stability boundary are computed. The results show that, for the steady state mass flow, the inlet resistance coefficient has the biggest percentage contribution rate about 70.89%. The next is the interaction of heating zone length and inlet temperature, and its percentage contribution rate is about 13.26%. The third is the heating zone length, and its percentage contribution rate is about 12.32%. For the oscillation period, the heating zone length has the biggest percentage contribution rate about 68.47%, the next is the inlet resistance coefficient, and its percentage contribution rate is about 24.04%. The effect of other factors and factor interaction on the steady state flow and oscillation period are negligible.