主氦风机试验回路氦气流动特性的研究  

Study on the Helium Flow Characteristics of the Primary Helium Circulator

作　　者：赵钦 王志祥 邓晴 曲新鹤 叶萍 杨小勇 赵钢 ZHAO Qin;WANG Zhi-xiang;DENG Qing;QU Xin-he;YE Ping;YANG Xiao-yong;ZHAO Gang(Collaborative Innovation Center for Advanced Nuclear Energy Technology,MOE Key Laboratory of Advanced Reactor Engineering and Safety,Institute of Nuclear and New Energy Technology of Tsinghua University;Yueyang Zhusheng Valve Pipeline Co.,Ltd.)

机构地区：[1]清华大学核能与新能源技术研究院先进核能技术协同创新中心先进反应堆工程与安全教育部重点实验室 [2]岳阳筑盛阀门管道有限责任公司

出　　处：《化工机械》2022年第2期234-241,共8页Chemical Engineering & Machinery

基　　金：国家科技重大专项(2012ZX06901-022,2014ZX06901023)。

摘　　要：采用数值模拟方法对主氦风机的氦气管道中不同弯径比90°弯头进行分析。结果表明,弯头内流体在离心力作用下,形成外壁面压力高、内壁面压力低的压力梯度。流体在进入弯头段后外弧面压力明显升高,至弯角α≈45°处开始降低;内弧面压力在进入弯头段后明显降低,且先于外弧面在弯角α≈30°处达到最低点。弯径比越小,弯头内外弧面压差越大,弯头出口段的双螺旋流动现象越明显,弯头流动损失越大。Numerical simulation was adopted to analyze 90°bends with different bend-diameter ratios in the helium pipeline.The results indicate that,the fluid in the elbow stays under centrifugal force and when the fluid enters the bend section,the pressure on the outer arc surface increases significantly and then decreases at the bending angle ofα≈45°;the pressure on the inner arc surface decreases significantly after entering the elbow section and reaches the lowest point atα≈30°.The smaller the bend diameter ratio,the greater the pressure difference between the inner and outer arc surfaces of the bend;the more obvious the double spiral flow phenomenon at the outlet section of the bend,the greater the flow loss at the elbow.

关 键 词：氦气管道 90°弯头 主氦风机 高温气冷堆 大弯径比 流动特性 数值模拟 

分 类 号：TQ055.81[化学工程]