环形通道内定位格架对超临界水传热的影响  

Effect of Spacer Grid on Heat Transfer to Supercritical Water in Annular Pipe

作　　者：许多挺 李虹波[2] 杨珏[2] 赵萌[1] 顾汉洋[1] 

机构地区：[1]上海交通大学核科学与工程学院,上海200240 [2]中科华核电技术研究院有限公司,广东深圳518026

出　　处：《原子能科学技术》2015年第5期832-835,共4页Atomic Energy Science and Technology

摘　　要：定位格架对棒束内流动传热具有极重要的影响,目前定位格架对超临界水传热的影响仍无相应的试验数据。本文基于上海交通大学完成的超临界水在环形通道内的对流传热试验,评价了传统定位格架对下游传热系数衰减关联式的适用性。试验结果表明,定位格架的面积阻塞比对格架下游传热系数衰减规律有很大影响;在超临界压力与次临界压力条件下,定位格架下游传热系数衰减规律也有较大的差异。The spacer grid has a great impact on convective heat transfer in rod bundles . So far ,there is still no experiment data corresponding to the effect of spacer grid on heat transfer to supercritical water .Based on the convective heat transfer experiment with supercritical water in annular pipe in SJTU ,the traditional correlations’ applicability was evaluated in this paper .The experiment results show that the attenuation law of heat transfer coefficient in the dow nstream locations is influenced by the block ratio of spacer grid greatly . Compared with subcritical pressure , the attenuation law of the dow nstream heat transfer coefficient has different forms at supercritical pressure .

关 键 词：定位格架 超临界水 流动传热 衰减 

分 类 号：TK124[动力工程及工程热物理—工程热物理]