作　　者： (唐红）;

机构地区： 中国核动力研究设计院

出　　处： 《核动力工程》 2017年第S1期45-48,共4页

摘　　要： 为了研究竖直及倾斜条件对堆芯热工水力特性,采用RANS模拟对棒束通道进行了数值模拟,分析了静止及倾斜条件下棒束通道内流场特征及温度分布。模拟结果表明:在入口流速相同的情况下,倾斜会使棒束通道间隙处主流速度略微减小,且倾角越大,间隙处主流流速越大。倾斜条件使得棒束通道内温度场分布发生改变,随着倾斜角度的不断增大,主流最大温度不断增加,导致棒的壁面温度增大,不利于反应堆安全。 The purpose of the present paper is to investigate the thermal-hydraulics of rod bundle in vertical condition and inclined condition, and the fuel assembly with 3 ? 3 rod bundle is simulated with Reynolds-Averaged Navier-Stokes equations. The flow field is analyzed. The results show that the inclination will decrease the value of bulk velocity in gaps and the bulk velocity decreases with the increased angle of inclination in conditions of same inlet velocity. Inclination changes the distribution of temperature and the maximum temperature of the wall increases with increased angle of inclination which is not benefit for the safety of nuclear reactors.

关 键 词： 计算流体力学 棒束通道 竖直条件 倾斜条件