对絮凝过程中产生的复杂流体流动和湍流进行了研究。在一个方形间歇式反应器的多个位置测量了平均速度和湍流速度、单位质量的湍流动能和单位质量的能量耗散率。评估了改变容器尺寸和叶轮类型对流体力学性能的影响。这项研究是用一台拉什顿涡轮机和一台A310流体箔式叶轮在三个尺寸分别为5L、28L和560L的方形水箱中进行的。流体速度的测量是使用双探头进行的- 通道激光多普勒测速仪，带有增强型脉冲频谱分析仪。为了分离和比较絮凝池尺寸和叶轮类型对絮凝流体力学的影响，絮凝池在40 s-1的恒定平均特征速度梯度G下运行。结果表明，当G=常数时，A310箔式叶轮产生的湍流与Rushton涡轮机产生的湍流大不相同。Rushton涡轮的无量纲均方根脉动速度、湍流动能和局部湍流能量耗散率高于A310箔式叶轮。 发现无量纲均方根脉动速度和湍动能随水槽尺寸的增加而增加，与叶轮类型无关。研究发现，对于Rushton涡轮机，局部湍流能量耗散率随水槽尺寸的增大而减小，而对于A310箔式叶轮，能量耗散率随水槽尺寸的增大而保持不变。根据这项研究的结果，有明确的证据表明，保持G=恒定的水箱尺寸或叶轮类型并不意味着水箱中产生的局部湍流的恒定空间分布。

A study was performed to characterize the complex fluid flow and turbulence produced in the flocculation process. Mean and turbulent velocities, turbulent kinetic energy per unit mass, and energy dissipation rate per unit mass were measured at several locations in a square batch reactor. The effects of changing the vessel size and impeller type on the fluid mechanics properties were evaluated. The study was performed with a Rushton turbine and an A310 fluid foil impeller in three square tank sizes of 5L, 28L, 560L. Measurement of the fluid velocities was done using a dual-channel laser Doppler velocimeter with an enhanced burst spectrum analyzer. In order to isolate and compare the effects of tank size and impeller type on the flocculation fluid mechanics, the flocculation tanks were operated at a constant average characteristic velocity gradient, G, of 40 s-1. Results indicate that the turbulence generated by an A310 foil impeller is much different than that produced by the Rushton turbine when G=constant. The dimensionless rms fluctuating velocity, turbulent kinetic energy, and local turbulent energy dissipation rate were higher for the Rushton turbine than for the A310 foil impeller. The dimensionless rms fluctuating velocity and turbulent kinetic energy were found to increase with increasing tank size regardless of impeller type. The local turbulent energy dissipation rate was found to decrease with increasing tank size for the Rushton turbine and the energy dissipation rate was found to remain constant with increasing tank size for the A310 foil impeller. Based on the results of this study, there is clear evidence that maintaining G=constant with tank size or impeller type does not translate to constant spatial distribution of the local turbulence generated in the tank.