CAJ | 학술논문

针对超临界水冷堆热工水力系统简化模型，采用微扰动线性化及L aplace变换的方法，对热工水力系统的非线性守恒方程进行线性化处理，推导出闭环系统传递函数。用M atlab软件对闭环系统进行了分析和仿真，得到模型闭环系统的稳定边界图，并分析了堆芯入口流速、加热段长度、重力加速度、入口节流系数对系统稳定边界的影响。结果表明，增大堆芯入口流速、加热段长度、重力加速度有利于系统的稳定，而入口节流系数对稳定性边界影响不大。
침대초림계수랭퇴열공수력계통간화모형，채용미우동선성화급L aplace변환적방법，대열공수력계통적비선성수항방정진행선성화처리，추도출폐배계통전체함수。용M atlab연건대폐배계통진행료분석화방진，득도모형폐배계통적은정변계도，병분석료퇴심입구류속、가열단장도、중력가속도、입구절류계수대계통은정변계적영향。결과표명，증대퇴심입구류속、가열단장도、중력가속도유리우계통적은정，이입구절류계수대은정성변계영향불대。
Aiming at the simplified model of supercritical water cooled reactor thermal-hydraulic system ,small perturbation linearization and Laplace transform method were adopted to linearize the nonlinear thermal-hydraulic system conservation equations . Then the closed-loop system transfer function was deduced .Matlab code was used to analyze and simulate the closed-loop system and obtain the stability boundary map of the closed-loop system ,and the effects of reactor core inlet flow velocity ,heating length , gravity acceleration and inlet throttling coefficient on the system stability boundary were analyzed finally .The results show that if the reactor core inlet flow rate ,the heating section length ,and the gravity acceleration increase ,the stability of the system will be better ,and however the inlet throttling coefficient rarely affects the stability boundary .