类四边形堆芯子通道内超临界水传热特性研究  

Heat Transfer Characteristic of Supercritical Pressure Water Flowing in Square Sub-channel of Reactor

作　　者：王为术[1] 崔强[1] 赵鹏飞[1,2] 陈刚[1] 毕勤成[3] 

机构地区：[1]华北水利水电大学热能工程研究中心,河南郑州450011 [2]洛阳中重发电设备有限责任公司,河南洛阳471003 [3]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《原子能科学技术》2016年第12期2175-2180,共6页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(51406026);河南省高校科技创新团队支持计划资助项目(16IRTSTHN017);河南省科技创新人才计划资助项目(154100510011)

摘　　要：基于类四边形堆芯子通道超临界水的传热试验，建立棒径为8 mm、栅距比为1.2的超临界水冷反应堆（SCWR）类四边形堆芯子通道物理模型，采用SSG湍流模型，在 p＝23～28 M Pa超临界压力范围，研究了子通道内超临界水的传热特性，分析了压力、质量流速和热流密度等热工参数对类四边形子通道内超临界水传热特性的影响。研究结果表明：采用SSG湍流模型数值研究计算得到的内壁温度与试验结果变化趋势一致。在拟临界区，随压力的增大，相应的换热系数峰值逐渐降低。质量流速的增加，在整个焓区均能明显加强子通道内传热现象。随热流密度的增加，内壁温度逐渐升高，对应的换热系数峰值降低，同时逐渐向低焓区方向移动。A physical model was built in this study to numerically investigate the heat transfer characteristics of supercritical pressure water within a square sub‐channel by using the SSG Reynolds stress model .The corresponding fuel rod diameter was 8 mm and the pitch‐to‐diameter ratio was 1.2 respectively . The effects of pressure ,mass velocity and heat flux on the heat transfer characteristics were analyzed in detail .It is found that the numerical results of the wall temperature trend are consistent with the experiment results .The peak of heat transfer coefficient decreases with the increase of＆amp;nbsp;pressure in the pseudo‐critical region . The increase of mass velocity can significantly enhance the heat transfer in sub‐channel in a wide enthalpy region .With the increase of heat flux ,the wall temperature increases and the peak value of heat transfer coefficient decreases ,gradually moving towards low enthalpy region at the same time .

关 键 词：超临界水冷反应堆 类四边形子通道 超临界水 传热 数值研究 

分 类 号：TK124[动力工程及工程热物理—工程热物理]