Development of a New Gas-Inducing Turbine Family: The Partially Shrouded Turbine

To increase the gas-inducing capacity of a shrouded turbine and avoid using an additional impeller in the stirred tank, geometrical modifications of the lower disk of this turbine have been considered. The performance of several new, partially shrouded gas-inducing turbines has been investigated by computational fluid dynamics for single-phase flow with the Fluent software. The new turbine designs are shown to have pressure coefficients close to the totally-shrouded-turbine coefficient, corresponding to low critical agitation velocities for gas inducement but with significantly higher pumping capacities and increased gas-inducing capacities.