Experimental Investigation of Critical Submergence Reduction using AntiVortex Device in a Pump Intake
Journal of energy and environmental sustainability
Specific hydraulic phenomena in a pump intake which can cause adverse effects on pump performance include free surface vortices, pre-swirl magnitude, and air entrainment. In this regard, critical submergence is a significant parameter which is defined as the depth at which the free surface vortex begins entraining air. Identification of air entrainment at pump intakes and the recommendation of possible solutions to them is usually done by conducting experiments on reduced scaled models. In the
... led models. In the present case study, the surface vortex formation is investigated in a 1:10 pump intake model. A novel Anti-vortex device (AVD) has been proposed in the present work and the efficacy of the same has been investigated through experimental study. The provision of AVD and other elements in the pump intake have resulted in the reduction of required submergence by 64% relative to submergence as per Hydraulic Institute Standards (S HIS ) at 1.5 F m (Model Froude number) in a 1:10 scale model.