Selected Article

Title

A STUDY ON THE UNSTEADY PRESSURE CHARACTERISTICS IN A DOUBLE SUCTION CENTRIFUGAL PUMP WITH STAGGERED BLADE ARRANGEMENT

A STUDY ON THE UNSTEADY PRESSURE CHARACTERISTICS IN A DOUBLE SUCTION CENTRIFUGAL PUMP WITH STAGGERED BLADE ARRANGEMENT

Description

Theoperating life of a centrifugal pump is effected by the magnitude of the radialforces. Fundamentally, these forces are due to pressure variations around theimpeller periphery which is a result of the complex interaction of two maincomponents; impeller and volute. There are several approaches in the literaturefor load reduction. Double volute pumps have been successfully used for years.However, this method involves serious manufacturing problems and efficiencylosses. This paper aims at using the effectiveness of a new approach calledstaggered blade arrangement for the reduction of radial forces in a doublesuction pump. A comparative analysis is performed by judging several keyparameters such as pressure, velocity and reaction forces. The accuracy of thedeveloped Computational Fluid Dynamics model was also verified with the pumpperformance tests. The outcomes of the study revealed that staggered bladearrangement can be used as an effective tool for reducing the radial forces ina centrifugal pump without needing to double volute design.

The operating lifeof a centrifugal pump is effected by the magnitude of the radial forces. Fundamentally,these forces are due to pressure variations around the impeller periphery whichis a result of the complex interaction of two main components; impeller and volute.There are several approaches in the literature for load reduction. Doublevolute pumps have been successfully used for years. However, this methodinvolves serious manufacturing problems and efficiency losses. This paper aimsat using the effectiveness of a new approach called staggered blade arrangementfor the reduction of radial forces in a double suction pump. A comparativeanalysis is performed by judging several key parameters such as pressure,velocity and reaction forces. The accuracy of the developed Computational FluidDynamics model was also verified with the pump performance tests. The outcomesof the study revealed that staggered blade arrangement can be used as aneffective tool for reducing the radial forces in a centrifugal pump without needingto double volute design.