【作者】 杨勇勇； 曹夏昕； 雷文静； 田旺盛；

【Author】 Yang Yongyong;Cao Xiaxin;Lei Wenjing;Tian Wangsheng;Fundamental Science on Nuclear Safety and Simulation Technology Laboratory,Harbin Engineering University;

【机构】 哈尔滨工程大学核安全与仿真技术国防重点学科实验室；

【摘要】 C型管束管外池沸腾换热是非能动余热排出换热器基本工作原理之一。通过对常压下C型管束管外池沸腾换热的实验研究,分析了管束中局部管段沸腾现象和外壁面过热度沿管程变化规律,对比了管束与单管以及管束中各管的换热能力。结果表明:管束中局部换热不均匀,C型管束顶部换热能力大于底部换热能力;管束中间管换热系数是单管的1.34~1.44倍;管束外侧管换热系数大于内侧管,可达到内侧管的1.19倍。管束沸腾换热系数实验值与常用大容积沸腾经验关系式计算值比较表明,Rohsenow关系式沸腾换热系数计算值与实验值符合较好,相对偏差小于6%。更多还原

【Abstract】 Pool boiling heat transfer of C-type bundle has been applied to passive residual heat removal heat exchanger. In this paper, an experimental study of pool boiling heat transfer was carried out on a C-type tube bundle in water under atmospheric pressure. The boiling phenomenon of various parts of the bundle and wall superheat distribution along the tube were analyzed. The heat transfer capacity between the tube bundle with the single tube, and between tubes in the bundle were compared. The experimental results indicate that the heat transfer conditions of different C-type tube bundle parts are heterogeneous. The upper part of bundle is more efficient in transfer heat than the lower part. The heat transfer coefficient of the tube bundle is 1.34-1.44 times that of single tube. The outside tube has higher heat transfer ability and can reach 1.19 times that of the inside tube. The experimental pool boiling heat transfer coefficient was compared with the calculated values of well-known correlations. The Rohsenow correlation shows a good agreement with experimental data and the relative deviation is less 6%.更多还原