Three-dimensional calculation of air-water two-phase flow in centrifugal pump impeller based on a bubbly flow model. (1st report. Distributions of pressure and void fraction).

To predict the behavior of gas-liquid two-phase flows in a centrifugal pump impeller, a three-dimensional numerical method is proposed on the basis of a bubbly flow model. Under the assumption of homogeneous bubbly flow entraining fine bubbles, the equation of motion of the mixture is represented by that of liquid-phase and the liquid velocity is expressed as a potential for a quasi-harmonic equation. This equation is solved with a finite element method to obtain the velocities, and the equation of motion of an air bubble is integrated numerically in the flow field to obtain the void fraction. These calculations are iterated to obtain a converged solution. The method has been applied to a radial-flow pump, and the results obtained have been confirmed by experiments within the range of bubbly flow regime.

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Three-Dimensional Calculation of Air-Water Two-Phase Flow in a Centrifugal Pump Based on a Bubbly Flow Model with Fixed Cavity.

JSME International Journal Series B ◽

10.1299/jsmeb.37.726 ◽

1994 ◽

Vol 37 (4) ◽

pp. 726-735 ◽

Cited By ~ 5

Author(s):

Kiyoshi Minemura ◽

Tomomi Uchiyama

Keyword(s):

Centrifugal Pump ◽

Flow Model ◽

Two Phase Flow ◽

Bubbly Flow ◽

Three Dimensional ◽

Phase Flow ◽

Two Phase

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Characterization of a centrifugal pump impeller under two-phase flow conditions

Journal of Petroleum Science and Engineering ◽

10.1016/j.petrol.2008.06.005 ◽

2008 ◽

Vol 63 (1-4) ◽

pp. 18-22 ◽

Cited By ~ 63

Author(s):

Jose Caridad ◽

Miguel Asuaje ◽

Frank Kenyery ◽

Andrés Tremante ◽

Orlando Aguillón

Keyword(s):

Centrifugal Pump ◽

Two Phase Flow ◽

Phase Flow ◽

Flow Conditions ◽

Two Phase ◽

Pump Impeller ◽

Centrifugal Pump Impeller

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Investigation on the Handling Ability of Centrifugal Pumps under Air–Water Two-Phase Inflow: Model and Experimental Validation

Energies ◽

10.3390/en11113048 ◽

2018 ◽

Vol 11 (11) ◽

pp. 3048 ◽

Cited By ~ 9

Author(s):

Qiaorui Si ◽

Gérard Bois ◽

Qifeng Jiang ◽

Wenting He ◽

Asad Ali ◽

...

Keyword(s):

Centrifugal Pump ◽

Two Phase Flow ◽

Bubbly Flow ◽

Three Dimensional ◽

Navier Stokes ◽

Phase Flow ◽

Centrifugal Pumps ◽

Flow Conditions ◽

Two Phase ◽

Local Flow

The paper presents experimental and numerical investigations performed on a single stage, single-suction, horizontal-orientated centrifugal pump in air–water two-phase non-condensable flow conditions. Experimental measurements are performed in a centrifugal pump using pressure sensor devices in order to measure the wall static pressures at the inlet and outlet pump sections for different flow rates and rotational speeds combined with several air void fraction (a) values. Two different approaches are used in order to predict the pump performance degradations and perform comparisons with experiments for two-phase flow conditions: a one-dimensional two-phase bubbly flow model, and a full “Three-Dimensional Unsteady Reynolds Average Navier–Stokes” (3D-URANS) simulation using a modified k-epsilon turbulence model combined with the Euler–Euler inhomogeneous two-phase flow description. The overall and local flow features are presented and analyzed. Limitations concerning both approaches are pointed out according to some flow physical assumptions and measurement accuracies. Some additional suggestions are proposed in order to improve two-phase flow pump suction capabilities.

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