Two-Fluid Model Based Relationships for Gas-Liquid Centrifugal Pumping Analysis

Abstract

Centrifugal pumps are known to show a surging behavior; at certain conditions of free gas and liquid flow rate at the intake. In the surging region on a pump characteristic curve, the head generated is significantly lower than if the pump was handling gas-liquid bubbly mixture. The surging happens due to the existence of an elongated bubble; at the inlet region of the pump impeller. The existence of this elongated bubble at the rotor entrance has dramatic effects on the energy transfer process to the gas-liquid mixture and shall not be overshadowed. Therefore, to map and correlate the pump performance curve in terms of the two-phase flow parameters one has to disclose and set a model that encompasses the mechanisms that form this elongated bubble. The one-dimensional Two-Fluid Model was used to accomplish this.

Author: Estevam, V., Franca, F. A., & Alhanati, F. J. S.

Publisher: 12th International Conference on Multiphase Production Technology, 25-27 May, Barcelona, Spain

Year: 2005

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