低压系统中非能动虹吸破坏的机理研究  

Mechanism Study on Passive Siphon Break of a Low-Pressure System

作　　者：郑伊芸 黄善仿[1] 郭啸宇[1] 王宁波[1] 庞天枫 江斌[1] 秦晓斌[1] 夏少鹏 李敏[2] 

机构地区：[1]清华大学工程物理系,北京100084 [2]国立清华大学核子工程与科学研究所,台湾新竹030013

出　　处：《核动力工程》2016年第2期156-159,共4页Nuclear Power Engineering

基　　金：国家自然科学基金项目(51006068)

摘　　要：虹吸破坏现象对核安全中的冷却剂丧失事故有重要影响。对非能动空气-水两相流系统中的虹吸破坏过程进行了实验研究,观测了流动过程,对压差、液相流量及液位随时间的变化进行了测量。实验观察到下降管段中的两相流流型随时间变化依次为泡状流、弹状流和降膜流。实验结果表明,非能动虹吸破坏系统能够显著增加压降,降低液相流量。因此,非能动虹吸破坏现象能够减少冷却剂丧失事故中堆芯裸露的风险。Siphon break has great influence on the Loss of Coolant-Accident （LOCA） for the nuclear safety. Experimental researches were carried out to study the siphon breaking process in a passive air-water two-phase flow loop. Flow processes were observed and important parameters were measured including pressure drops, water flowrate, and water level. Flow pattern in downward flow pipe is found to be bubbly flow, slug flow and falling film flow in turn. Experimental results show that the passive siphon breaking system could significantly increase pressure drop and reduce water flowrate. Therefore, under the LOCA condition, the goal to reduce the exposing risk of the reactor core can be realized by the siphon breaking effect.

关 键 词：核安全 冷却剂丧失事故 虹吸破坏 非能动系统 下降两相流 

分 类 号：TL33[核科学技术—核技术及应用]