摘要
在低流量强迫循环工况下,一部分U型管可能会发生流动反转的现象。通过实验研究了低流量强迫循环条件下一次侧入口温度、一回路总流速、电动调节阀阻力系数以及二次冷却水流量对U型管倒流临界点的影响。结果表明:随一次侧入口温度的增加,倒流临界流速增大;随一回路总流速的增大,倒流时U型管入口温度逐渐增大;从实验结果来看,电动调节阀阻力系数对倒流临界点的影响并不显著;随二次侧冷却水流量的增大,倒流临界流速缓慢下降。
Under low flow forced circulation conditions,reverse flow may occur in some U-tubes.The effects of primary side inlet temperature,primary side total flow velocity,electric regulating valve resistance coefficient and secondary side mass flow rate on the critical point of the U-tube reverse flow under conditions of low flow forced circulation were studied by experiments.The results show that with the increase of the primary side inlet temperature,the critical flow velocity of the reverse flow increases.With the increase of primary side total flow velocity,the U-tube inlet temperature gradually increases during occurring reverse flow.From the experimental results,the electric regulating valve resistance coefficient has no significant effect on the critical point of reverse flow.With the increase of secondary side mass flow rate,the critical flow velocity of reverse flow slowly decreases.
作者
刘浩
马在勇
姜张锐
唐瑜
张卢腾
徐建军
孙皖
袁德文
潘良明
LIU Hao;MA Zaiyong;JIANG Zhangrui;TANG Yu;ZHANG Luteng;XU Jianjun;SUN Wan;YUAN Dewen;PAN Liangming(Key Laboratory of Low-grade Energy Utilization Technologies and Systems,Ministry of Education,Chongqing University,Chongqing 400044,China;CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology,Nuclear Power Institute of China,Chengdu 610041,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2021年第7期1309-1315,共7页
Atomic Energy Science and Technology
基金
国家自然科学基金(11905021,11805026)。
关键词
蒸汽发生器
倒流
强迫循环
参数影响
steam generator
reverse flow
forced circulation
effect of parameter
