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A STUDY ON PERFORMANCE AND INTERNAL FLOW PATTERN OF A VORTEX PUMP

Hideki OHBA, Yukitoshi Nakashima, Kazuaki SHIRAMOTO, Kazumasa Shiramoto, Toshikatsu KOZIMA

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Abstract

A vortex pump having a large chamber in front of the recessed impeller is suited for pumping the liquids with suspended solids. The flow behaviours in the chamber and impeller have been observed by the surface flow pattern technique of the impeller and casing for the purpose of establishment of the fundamental flow model in vortex pump. On the basis of these observations, a simplified flow model has been proposed. On the other hand, a theoretical analysis using the equations of continuity, motion and the performances. Predicted values by the theory were compared with the experimental results, and fairly good agreement was obtained. In Addition, the effects of the casing and impeller geometries on the performance of pump were investigated experimentally.

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What this paper is about

A vortex pump having a large chamber in front of the recessed impeller is suited for pumping the liquids with suspended solids. The flow behaviours in the chamber and impeller have been observed by the surface flow pattern technique of the impeller and casing for the purpose of establishment of the fundamental flow model in vortex pump. On the basis of these observations, a simplified flow model has been proposed. On the other hand, a theoretical analysis using the equations of continuity, motion and the performances. Predicted values by the theory were compared with the experimental results, and fairly good agreement was obtained. In Addition, the effects of the casing and impeller geometries on the performance of pump were investigated experimentally.

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Available abstract

A vortex pump having a large chamber in front of the recessed impeller is suited for pumping the liquids with suspended solids. The flow behaviours in the chamber and impeller have been observed by the surface flow pattern technique of the impeller and casing for the purpose of establishment of the fundamental flow model in vortex pump. On the basis of these observations, a simplified flow model has been proposed. On the other hand, a theoretical analysis using the equations of continuity, motion and the performances. Predicted values by the theory were compared with the experimental results, and fairly good agreement was obtained. In Addition, the effects of the casing and impeller geometries on the performance of pump were investigated experimentally.

Key concepts: Impeller, Vortex, Mechanics, Casing, Flow (mathematics), Rotodynamic pump, Centrifugal pump, Materials science

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