THE EFFECT OF IMPELLER BLADE GEOMETRY/INCLINATION ON MIXING/EMULSION

This study was conducted to investigate the effects of impeller blade geometry/inclination on mixing/emulsion. This study was conducted using a Gunt CE 320 Liquid mixing unit. The power consumption and mixing time were the two main focus in this research study using a relationship of Power Number to Reynolds Number and the Fox and Gex Equation respectively. Four different types of impellers were used: Impeller Type 1 (100mm, 3 Blade), Impeller Type 2 (100mm, 2 Blade), Impeller Type 3 (100mm, 10 Hole) and Impeller Type 4 (70mm, 3 Blade) The torque readings were taken at different impeller speeds for the power consumption part for all impeller types at four different positions experimented with (Centre, 5cm offset from the centre, at an inclined angle of 20 degrees and at the top). The conductivity method was used in obtaining the mixing time using a solution of potassium chloride (KCl) and water as the tracer in an open vessel system. This methodology was used for two mixtures, Mixture Type 1 (Tap Water Only) and Mixture Type 2 (Oil and Water).

本研究旨在探究叶轮叶片几何形状/倾角对混合/乳化过程的影响。本实验采用Gunt CE 320型液体混合单元开展相关研究。本研究以功率数（Power Number）与雷诺数（Reynolds Number）的关联式、以及福克斯与格克斯方程（Fox and Gex Equation）分别作为功耗与混合时间的分析依据，聚焦功耗与混合时长两大核心观测指标。本次实验共使用四种不同叶轮：1号叶轮（100mm直径，3叶片）、2号叶轮（100mm直径，2叶片）、3号叶轮（100mm直径，10孔）以及4号叶轮（70mm直径，3叶片）。针对功耗测试环节，我们在四种不同安装位置（中心位置、偏离中心5cm处、20°倾斜位置以及顶部位置）下，针对所有叶轮类型采集不同叶轮转速下的扭矩读数。混合时长的测量采用电导法：以氯化钾（KCl）水溶液作为示踪剂，在敞口容器体系中完成实验。该实验方法分别应用于两类混合体系：1号混合体系（仅自来水）与2号混合体系（油与水的两相混合体系）。