摘要
本文研究了碱金属高温热管的启动及运行瞬态,在传统热管冷态启动模型基础上,建立了以蒸气流态转变为划分依据的冷态启动三阶段模型,并依据该模型开发了热管启动瞬态分析程序HPSTAC,程序模拟结果与实验值相对偏差不超过15.7%。使用该程序模拟单根钠钾热管的启动瞬态并进行了敏感性分析,结果表明:启动开始后450、660、1550 s,热管分别进入启动第2、3阶段与准稳态,蒸气区域趋于一致性温度837 K;启动环境温度主要影响冷凝段升温速度,输入热流密度对热管启动各阶段的影响存在阈值效应。
The startup and operation transients of alkali metal high temperature heat pipes were studied in this paper.Based on the traditional heat pipe frozen startup model,a three-stage model depending on vapor flow transition was established,and a heat pipe startup transient analysis code,HPSTAC,was developed.The relative deviation between the code simulation result and experimental value is less than 15.7%.The HPSTAC code was used to perform the startup transient of single sodium-potassium heat pipe and sensitivity analysis.The results show that 450,660 and 1550 s after the starting,the heat pipe enters the second,third,and quasi-steady states respectively,and the vapor region tends to a consistent temperature of 837 K.The startup surrounding temperature mainly affects the heating rate of the condensation section,and there is a threshold on the heat flux influence of stage process during heat pipe startup.
作者
张泽秦
王成龙
孙浩
张大林
秋穗正
苏光辉
田文喜
ZHANG Zeqin;WANG Chenglong;SUN Hao;ZHANG Dalin;QIU Suizheng;SU Guanghui;TIAN Wenxi(School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2021年第6期1015-1023,共9页
Atomic Energy Science and Technology
基金
科技部重点研发计划资助项目(2019YFB1901100)。
关键词
碱金属
高温热管
冷态启动
数值模拟
alkali metal
high temperature heat pipe
frozen startup
numerical simulation
