Abstract: Hydrodynamic characteristics of a modified Ross static mixer with different number of elements was investigated by using particle image velocimeter (PIV) and pressure drop measurement. The fluid flow and pressure drop in the modified Ross static mixer with 5 elements and without element were numerically simulated by using computational fluid dynamics (CFD) package FLUENT6.0. The velocity and pressure drops predicted by CFD were in good agreement with the experimental data. The empirical correlation of the pressure drop was given by Dp=14.7231Re-0.156(L/D)0.446ru2/2. The maximum pressure drop across the static mixer was found to occur at Reynolds number of 20000.

Key words: static mixer, numerical simulation, pressure drop, velocity field, PIV

摘要： 在改进型Ross静态混合器中对牛顿流体的流动进行了实验研究，并对空管和5单元的改进型Ross静态混合器的流动进行了数值模拟，将实验与数值模拟结果进行了比较，证实二者的结果一致. 结果表明，在改进型Ross静态混合器中，牛顿流体流动的压力降与雷诺数和静态混合器长径比的关系为Dp=14.7231Re-0.156(L/D)0.446ru2/2；在Re=20000时，z因子有最大值；整个静态混合器的压力降(流动阻力)主要集中在混合单元区域.

关键词: 静态混合器, 数值模拟, 压力降, 速度场, PIV