应用非线性ｋε湍流模式，采用非正交曲线坐标系下求解三维ＮＳ方程的非交错网格有限体积方法，数值模拟了充分发展条件下，三角形排列无限棒束间通道内，不同的几何参数（Ｐ／Ｄ），雷诺数（Ｒｅ）下的流动和传热问题。给出了不同参数下的速度和温度分布以及湍流二次流动，分析了几何参数、雷诺数及二次流对棒束内流动和传热特性的影响，得到了不同参数下通道的摩擦系数和Ｎｕｓｅｌｔ数，并与经验关系式作了比较 By using the nonlinear kε turbulence model, the non-staggered grid finite volume method for solving the three-dimensional NS equation in nonorthogonal curvilinear coordinates was used to numerically simulate the threedimensional NS equations under the fully developed conditions. The geometric parameters (P / D), Reynolds number (Re) flow and heat transfer problems. The velocity and temperature distribution and the secondary flow of turbulent flow under different parameters are given. The influence of geometric parameters, Reynolds number and secondary flow on the flow and heat transfer characteristics in the rod bundle is analyzed. The friction coefficient and Nuselt number, and compared with the empirical relationship