管式微滤膜器旋转横流三维湍流场数值模拟

NUMERICAL SIMULATION ON THREE DIMENSIONAL TURBULENT FLOW FIELD IN THE TUBULAR MICRO-FILTRATION MEMBRANE SEPARATOR WITH A ROTARY CROSS-FLOW

为进一步研究膜微滤机理,采用RNG κ-ε模型对管式微滤膜器旋转横流三维湍流场进行了数值模拟,得出了膜器环隙内流速分布和压力分布规律。将模拟计算结果与激光粒子成像测速系统PIV实测结果和用自行研制的高精度的计算机控制的在线膜器环隙压力测试系统实测的旋转横向流膜器环隙内的压力分布规律进行了比较,模拟计算结果与实测数据两者吻合较好。

Further research on the mechanism in membrane micro-filtration, RNG k-ε turbulent model is adopted to a numerically simulating the three dimensional turbulent rotary cross-flow flow field of a tubular micro-filtration membrane separator. The simulated results for the distribution laws of the flow field and pressure in the tubular micro-filtration membrane separator annular gap are obtained. The results are compared with the experimental data measured by PIV system of laser particle image. And also they are compared with the experimental data measured by a self-developing on-line pressure measuring system for the annular gap of a tubular membrane separator with the aid of computer. This system has high precision by using advanced software developing tools, such as Delphi and Access 2000. The pressure distribution laws in the annular gap of the tubular membrane separator with rotary cross-flow are measured by it. The model prediction pressure distributions agree with experimental measurements.