超临界水自然循环试验回路流动和传热特性数值研究  

Numerical Investigation on Flow and Heat Transfer Characteristics in the Natural Circulation Test Loop of Supercritical Water

作　　者：刘林顶[1] 李伟卿[1] 赵民富[1] LIU Lin-ding;LI Wei-qing;ZHAO Min-fu(China Institute of Atomic Energy)

机构地区：[1]中国原子能科学研究院

出　　处：《化工机械》2024年第5期734-738,746,共6页Chemical Engineering & Machinery

摘　　要：针对超临界自然循环试验回路开展了试验工况下超临界水的自然循环流动与传热特性数值模拟。研究得到,循环流量计算值与试验值符合较好,最大相对偏差仅5.7%;内壁温度计算值与试验值也符合较好,随着加热功率的增大开始升高偏缓,当功率大于约8 kW时,温升较陡,对应的传热系数下降剧烈,说明这一位置处于拟临界温度附近。The numerical simulation on both flow and heat transfer characteristics in natural circulation test loop of supercritical water under test conditions was carried out to show that,the calculated values are in good agreement with the experimental values and the maximum relative deviation of circulation flow is only 5.7%;the inner wall temperature rises slowly with the increase of heating power at the beginning and when the power is greater than about 8 kW,the inner wall temperature rises sharply and the corresponding heat transfer coefficient drops obviously.This indicates that this position stays near the pseudo critical temperature.

关 键 词：超临界水 自然循环 传热特性 

分 类 号：TL33[核科学技术—核技术及应用]