folding blade turbines;  numerical simulation;  Stirring characteristics

The multiple reference frame method (MRF) and standard k-ε model were used to simulate the stirring characteristics in the 45° folding blade turbine stirring tank widely used in industry, and the response of different monitoring points to the mixing effect was investigated, and obvious differences were found in the response of different monitoring points. The simulation study of the stirring flow pattern in the tank and the distribution and power consumption of the velocity vector when the distance from the bottom of the mixing paddle is changed, and the results show that when the C/T is 0.278, the flow pattern in the tank changes. When the flow pattern is changed, the power consumption of the impeller reaches a minimum.