压水堆稳压器波动管热分层的分析研究

Analysis of Thermal Stratification for Pressurizer Surge Line

热分层是管道水平管段中相对滞止或缓慢流动的冷、热流体因缺少混合而产生的不均匀温度分布现象。通过稳压器波动管热分层现象产生的原因和机理分析,并对稳压器波动管热分层现象进行数值模拟,建立了不同稳压器内部不同截面的热分层瞬态。

Thermal stratification is an asymmetrical temperature distributing phenomena which is due to the hot liquid and the cold liquid which have low velocity are not mixed. There are thermal stratification phenomena in the pressurizer surge line. It’s of great importance for the safety operation of nuclear power plants to research the thermal stratification in the pressurizer surge line. This paper theoretically analyzed the origin for thermal stratification, and numerically simulated the thermal stratification phenomena. The stratification transients are completed in different cross-sections of the surge line.