Distribution of dynamic pressure along a radial baffle in an agitated system with standard Rushton turbine impeller

The paper presents experimental results or axial distribution of tangential components of dynamic pressure along the height of the radial baffle in pilot plant cylindrical equipment with a standard six-blade Rushton disk turbine impeller and four baffles. Measurements were obtained under a turbulent regime of flow using the trailing target with balancing springs at eleven axial distances above the flat bottom. Experiments were carried for one impeller tank ratio D/T=1/3 at five levels or impeller speed and three levels of agitated liquid viscosity. The dimensionless mean dynamic pressure affecting the baffle exhibits maximum value at the levels of both investigated impeller off-bottom clearances C/T = 0.33 and 0.48 and then decreases both towards the bottom and towards the liquid surface. Transfer of the impeller torque by radial baffles in an agitated system with a standard Rushton turbine impeller exceeds 3/4 of the impeller torque for both investigated impeller off-bottom clearances when more than 2/3 of the transferred torsional moment of the baffles is located in the area of interference between the impeller discharge flow and baffles.