含气溶胶液相表面单气泡排液特性  

An experimental study on the single bubble film drainage characteristics on the free surface with aerosol

作　　者：虞想 谷海峰 马钎朝[3] 于建群 周艳民 梁辉 YU Xiang;GU Haifeng;MA Qianchao;YU Jianqun;ZHOU Yanmin;LIANG Hui(Heilongjiang Provincial Key Laboratory of Nuclear Power System&Equipment,Harbin Engineering University,Harbin 150001,China;College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China;Nuclear Power Insti-tute of China,Chengdu 610000,China)

机构地区：[1]哈尔滨工程大学黑龙江省核动力装置性能与设备重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工程大学核科学与技术学院,黑龙江哈尔滨150001 [3]中国核动力研究设计院,四川成都610000

出　　处：《哈尔滨工程大学学报》2023年第12期2143-2150,共8页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2020YFB1901401)。

摘　　要：为研究核反应堆严重事故下液池中气泡破裂产生的液滴夹带现象,本文利用高速摄影对含气溶胶液相表面单气泡破裂现象进行可视化研究。通过图像处理技术获取气泡寿命、气泡破裂位置和液膜打开速率,计算不同工况下的液膜厚度。探索气泡寿命分布,气泡液膜厚度随时间的变化规律,并分析液相温度及气溶胶浓度的影响。结果表明:气泡寿命服从形状参数为4/3的威布尔分布,平均气泡寿命会随气溶胶浓度的增加而增加;液膜厚度与气泡寿命呈指数为-2/3的幂律衰减,液膜厚度随液相温度及气溶胶浓度的增加而增加;在去离子水的工况下,随着液相温度的升高,气泡在底部破裂的概率增加。加入气溶胶后,气泡在底部破裂的概率也增加。相关结果能够为事故工况下液滴及气溶胶的释放量的预测提供依据。To investigate the droplet entrainment phenomenon caused by the bubble burst on the free surface in se-vere nuclear reactor accidents,this study employs high-speed photography to visualize the single bubble burst phe-nomenon.The diameter,lifetime,burst position,and film opening rate of the bubble are obtained using the image processing technique.The film thickness under different working conditions is calculated.The changes in the bub-ble lifetime distribution and bubble film thickness with time are investigated,and the effects of liquid temperature and aerosol concentration are analyzed.The results show that the bubble lifetime obeys the Weibull distribution with a shape parameter of 4/3.The average bubble lifetime increases with aerosol concentration,and the film thickness decays with bubble lifetime in a power-law with an exponent of-2/3.Additionally,the film thickness increases with the liquid temperature and aerosol concentration.Under the condition of deionized water,the probability of the bubble bursting at the bottom increases with the liquid temperature,and the probability increases after adding aero-sol.The results can provide a reference for predicting the release amount of droplets and aerosols under accident conditions.

关 键 词：核反应堆严重事故 气泡 气溶胶 高速摄影 排液特性 气泡寿命 威布尔分布 液膜厚度 

分 类 号：TL364[核科学技术—核技术及应用]