U型管内蒸汽冷凝回流压降特性的研究  

Investigation on Pressure Drop Characteristics of Reflux Condensation in Single Inverted U-tubes

作　　者：陈海燕[1] 陈玉宙[1] 张忠岳[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《核动力工程》2001年第2期122-126,共5页Nuclear Power Engineering

摘　　要：进行了单根 U型管内蒸汽冷凝回流实验。 U型管的内径为 20mm，总高度为 4.1m和 7.0m两种。在系统压力 0.1～ 6.0MPa、蒸汽质量流速 4～ 45kg/m2· s、二次侧进口冷却水温度 20～ 196℃的范围内，研究了 U型管内蒸汽冷凝回流的流动及其压降特性。Reflux condensation is studied in single inverted U-tubes. The experiments are conducted with two different tube lengths: 4.1 m and 7.0 m. The inner diameter of the U-tubes is 20 mm. Under the pressure range of 0.1-6.0 MPa, steam flow rate of 4-45 kg/m2 × s and inlet cooling water temperature of 20-196°C, the flow patterns and pressure drop characteristics of reflux condensation are investigated. It is revealed that the fluctuation amplitude of the pressure drop in the raising section of the U-tubes is increased with the increase of heat power and the system pressure.

关 键 词：压水堆 失水事故 压降 U型管 蒸汽冷凝回流 

分 类 号：TL364.4[核科学技术—核技术及应用]