高温气冷堆螺旋管式直流蒸汽发生器传热管壁面热点数值分析  

Numerical Analysis of the Hot Spot of the Heat Transfer Tube Wall in an HTGR Helical Tube Once Through Steam Generator

作　　者：马越[1] 李晓伟[1] 吴莘馨[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《工程热物理学报》2013年第7期1331-1334,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目资助(No.51006061);国家科技重大专项资助项目(No.2008ZX06901)

摘　　要：高温气冷堆采用螺旋管式直流蒸汽发生器。在氦气横掠管束及螺旋管内二次流的双重作用下,传热管壁面温度沿周向分布很不均匀。采用数值模拟方法研究螺旋管壁面温度分布,对蒸汽发生器的设计具有重要意义。根据实际工况计算得到螺旋管内局部对流换热系数,并将其作为边界条件,计算得到氦气横掠过热段螺旋管的管壁温度分布。结果表明,过热段传热管壁面最高温度位于顶部及螺旋内侧之间。由于氦气横掠管束及螺旋管内蒸汽对流换热不均匀引起的壁面热点偏差约为15℃。High Temperature Gas-cooled Reactor（HTGR） demonstration power plant uses a helical tube once through steam generator.Due to the effects caused by helium cross flow over tube bundles and secondary flow in helical tubes,the wall temperature in the circumferential direction is uneven. Investigate the helical tube wall temperature distribution by numerical method has important meanings for the design of the steam generator.The local heat transfer coefficients in the helical tube are numerically simulated with its working conditions.Then the local heat transfer coefficients are set as the convective boundary condition to calculate the wall temperature distribution with helium cross flow over the tube.The results show that the highest temperature of the tube wall is located between the top and the side of the helical axis.The hot spot caused by the heat transfer non-uniformity is about 15°C.

关 键 词：高温气冷堆 螺旋管 直流蒸汽发生器 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]