流体物性对冷中子源冷包截面含气率的影响模化研究  

Simulation Study for the Influences of Fluid Physical Properties on Void Fraction of Moderator Cell of Cold Neutron Source

作　　者：李小明[1] 毕勤成[2] 冯全科[1] 陈听宽[2] 杜社教[2] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《核动力工程》2004年第5期421-425,共5页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(10375046)

摘　　要：采用差压法测出了冷中子源模拟冷包中环形通道内不同层面的平均含气率,发现液相的表面张力与密度的比值是决定截面含气率的主要物性因素;此比值越大,含气率越低。氟利昂113的表面张力与密度的比值比液氢的相应值低,故可以选用氟利昂113作为模拟工质对中国先进研究堆冷中子源中气液两相氢循环的含气率进行模拟研究,且试验结果将偏于保守。The void fraction at different heights in the annular channel of moderator cell mockup was measured with a differential pressure transducer. The tests proved that the ratio of surface tension to density of liquid phase is the main factor that determines the physical properties on void fraction. The larger the ratio, the smaller the void fraction. The ratio of surface tension to density of Freon 113 is lower than that of liquid hydrogen. Therefore, Freon 113 can be used as working fluid to study the void fraction in the hydrogen two-phase thermo-siphon loop in the cold neutron source (CNS) of China Advanced Research Reactor (CARR)), and the results are conservative.

关 键 词：冷中子源 冷包 截面含气率 表面张力 密度 

分 类 号：O359.1[理学—流体力学]