Study On Fluid Flow And Visualization In A Rotor-Stator Reactor

Many reactors have been developed to achieve better micromixing and mass transfer effects, and rotor-stator reactor (RSR) is one of them. With the principle of higee technology, the RSR creates a strong centrifugal force by the relative movement of the rotor-rings and stator-rings to intensify reaction by splitting liquid into tiny droplets, threads and films. The RSR has been applied to the preparation of nanomaterials successfully.This thesis focuses on the fundamental research of the RSR, includes the following contents:the observation and study of the liquid flow and the pressure drop on the RSR under different experimental conditions. The results are as follows:1.Visualization study on the flow behavior of water in the RSR was carried out. Liquid droplets diameter and velocity under different operating conditions were obtained by recording the flow of the liquid droplets with a high-speed camera. The results show that the average diameters and velocity of the droplets in the cavity area were in the range of 286-1310 ?m and 1.56-10.06 m/s respectively.2.The experimental results of pressure drop in the dry RSR and wet RSR shows that both the dry RSR and wet RSR pressure drop increased with the increase of rotational speed and gas flow rate. With the increase of liquid flow rate, the wet RSR pressure drop decreased first and then increased. The dry RSR pressure drop larger than that of the wet RSR under the same experimental conditions.3. The numerical simulation with FLUENT on the dry RSR reached similar results with the experiments At the same time, the simulation results show that the dry RSR pressure drop also increased with the increase of the number of stator-rings/roror-ring layers.4. The VOF model was adopted to simulate the flowing of gas-liquid two phase in the RSR. The results obtained from the simulation were in good agreement with the visualization study and have a good reference value.