摘要
管束外含大量空气的蒸汽冷凝传热是非能动安全壳热量导出系统运行过程中的一个重要现象,它直接影响该系统向外界导出热量的效率。本文采用数值模拟的方法对大管径管束(d=38 mm)外含大量空气的蒸汽冷凝传热特性进行了分析。结果表明:此工况下,顺排管束的平均传热系数优于叉排管束,且提高幅度随管间距的增大而减小;管束的平均换热系数随管间距的增大而增大,在管间距为3 d时,除管束中心的3根传热管外,其余传热管上的冷凝换热系数均大于单管。
The condensation heat transfer process of steam in the presence of a large quantity of air outside the tube bundle is a crucial phenomenon to be taken into consideration during the operation of a passive containment heat removal system,which directly affects the efficiency of the system in exporting heat to the outside.The heat transfer characteristics of steam condensation with a large quantity of air outside a large diameter tube bundle(d=38 mm)are investigated in this paper via numerical simulation.Results show that the average condensation heat transfer coefficient(CHTC)of tube bundles arranged inline is superior to that of tube bundles in a staggered arrangement,and the increasing range decreases with the increase in tube spacing.Moreover,the average CHTC of the tube bundle increases with tube spacing.With the exception of the three heat transfer tubes in the center of the tube bundle,the CHTC of all the other heat transfer tubes is larger than that of a single tube when the tube spacing is 3 d.
作者
彭翔
边浩志
吴桐雨
周书航
曹夏昕
PENG Xiang;BIAN Haozhi;WU Tongyu;ZHOU Shuhang;CAO Xiaxin(College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China;Heilongjiang Provincial Key Laboratory of Nuclear Power System&Equipment,Harbin Engineering University,Harbin 150001,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2023年第7期1234-1241,共8页
Journal of Harbin Engineering University
基金
安全壳热工水力联合实验室基金项目(KY21019).
关键词
蒸汽冷凝
不凝性气体
大管径
排列方式
管间距
管束列数
换热系数
数值模拟
steam condensation
noncondensable gas
large pipe diameter
arrangement of bundles
pipe spacing
number of tube bundles
heat transfer coefficient
numerical simulation
