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2009•China Rural Water and HydropowerRequires access

Research on Cavitation in an Axial-Flow Pump

Bin Bai

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Abstract

Numerical simulation of cavitation in axial-flow pumps under large-flow conditions has been conducted by using Eulerian-Eulerian homogeneous model and Navier-Stokes equation with RNG turbulence model in this paper.An analysis of simulation results explains the main sources of bubble in flow of axial-flow pumps and predicts the assembly and region where cavitation and cavitation erosion has happened and brings out the relationship between pressure and cavitation areas of the back of the impeller.Comparative calculation of the head and efficiency confirms the stage of cavitation and it is good for the operation of axial-flow pump running.

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What this paper is about

Numerical simulation of cavitation in axial-flow pumps under large-flow conditions has been conducted by using Eulerian-Eulerian homogeneous model and Navier-Stokes equation with RNG turbulence model in this paper.An analysis of simulation results explains the main sources of bubble in flow of axial-flow pumps and predicts the assembly and region where cavitation and cavitation erosion has happened and brings out the relationship between pressure and cavitation areas of the back of the impeller.Comparative calculation of the head and efficiency confirms the stage of cavitation and it is good for the operation of axial-flow pump running.

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Available abstract

Numerical simulation of cavitation in axial-flow pumps under large-flow conditions has been conducted by using Eulerian-Eulerian homogeneous model and Navier-Stokes equation with RNG turbulence model in this paper.An analysis of simulation results explains the main sources of bubble in flow of axial-flow pumps and predicts the assembly and region where cavitation and cavitation erosion has happened and brings out the relationship between pressure and cavitation areas of the back of the impeller.Comparative calculation of the head and efficiency confirms the stage of cavitation and it is good for the operation of axial-flow pump running.

Key concepts: Cavitation, Impeller, Mechanics, Turbulence, Flow (mathematics), Axial-flow pump, Specific speed, Materials science

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