本文详细分析了棒束子通道间湍流交混的微观机理,借助一种湍流模型,从理论上推导出了对任何形式排列棒束子通道皆适用的单相流体湍流交混无因次通用方程:其中, 对几何因子K从理论上进行了定性预测,并根据有关文献[2,3,4,5,9]实验结果得到了几何因子K的经验关系式。以此关系式代入通用方程后能很好地关联文献[9]的全部实验数据,并能将其他研究者[1—7]在各种不同几何参数下得到的实验结果很好地统一于其中。 In this paper, the microscopic mechanism of turbulent cross-mixing between rod bunch channels is analyzed in detail. With a turbulence model, a universal equation for turbulent mixing of single-phase fluids applicable to any arrangement of rod bundle sub-channels is theoretically derived: , The geometrical factor K is theoretically predicted qualitatively and the empirical relation of the geometrical factor K is obtained according to the experimental results of the related literatures [2,3,4,5,9]. Substituting this equation into the general equation can well correlate all the experimental data in [9], and can well unify the experimental results obtained by other researchers [1-7] under various geometric parameters .