垂直加热通道内超临界水流动稳定性参数敏感性分析

摘要

给出了无量纲分析法与频域法相结合的稳定性分析方法的详细描述,并定义了影响稳定性的关键无量纲数.针对垂直加热通道内超临界水进行了密度波稳定性分析,并建立了稳定性边界.对系统人口阻力因数、出口阻力因数、摩擦闪数、进出口压降和流动方向等进行了参数敏感性分析,结果表明高的人口阻力因数有利于系统的稳定,但高的出口阻力因数和高的摩擦因数不利于系统的稳定,系统进出口压差对系统的稳定性影响较小,向上流动比向下流动更有利于系统的稳定.计算结果对超临界水堆的堆芯和系统设计具有指导性作用.%The description of a stability analysis method combing both the non-dimensional analysis method and frequency domain analysis method has been given in detail.The density-wave oscillation stability of vertical heated pipe has been analyzed, and the stability boundary has also been given out.The parametric studies of system inlet orifice coefficient, outlet orifice coefficient, friction of the wall, the pressure drop between inlet and outlet boundary, and the flow direction have been taken out, and the results showed that a higher inlet orifice coefficient is beneficial to the system stability, but a higher outlet coefficient and a higher friction coefficient can degrade the system stability.The system pressure drop has a limited effect on the stability.An upward flow system is more stable than a downward flow system.These calculation results can provide guidance to the SCWR reactor core and system design.