中文摘要：

基于三维不可压缩流体的雷诺平均Navier-Stokes方程和RNGk-ε湍流模型,应用有限体积法计算了双隔墩钟形进水流道7种不同工况的流道内流场,分析了钟形进水流道的流动特性,归纳了不同工况喇叭管进出口断面的速度分布规律,预测了流道的水力损失并揭示了水力损失规律。通过分析钟形进水流道各个断面的轴向速度分布均匀度与速度加权平均角度,给出了钟形进水流道的叶轮名义高度的取值范围（1.25~1.4）D,验证了钟形进水流道高度低的特点,计算结果表明采用RNGk-ε湍流模型能较好地分析进水流道的水力特性。

英文摘要：

Based on 3-D incompressible fluid Reynolds averaged N-S equations and RNG k-ε turbulent model,the flow distribution of the bell-like inlet passage with two partition piers,under 7 different working conditions,is calculated by the finite volume method;its flow characteristics is analyzed;the velocity distributions,in different working modes,at the bell mouth inlet and outlet cross section,are concluded;and the hydraulic loss is predicted with the loss rule exposed.Through an analysis of distribution uniformity degree about the axial velocity at every cross section,and that of the velocity weighted average angle,the nominal height range of the impeller in the bell-like inlet passage can be marked from（1.25~1.4） D,and the low height characteristics of the passage can be proved.The results show that RNG k-ε turbulence model is effective for hydraulic performance analysis.