scholarly journals Numerical Study on the Gas-Water Two-Phase Flow in the Self-Priming Process of Self-Priming Centrifugal Pump

Processes ◽  
2019 ◽  
Vol 7 (6) ◽  
pp. 330 ◽  
Author(s):  
Chuan Wang ◽  
Bo Hu ◽  
Yong Zhu ◽  
Xiuli Wang ◽  
Can Luo ◽  
...  
Keyword(s):  
Centrifugal Pump ◽  
Two Phase Flow ◽  
Numerical Study ◽  
The Self ◽  
Main Stage ◽  
Phase Flow ◽  
Urban Greening ◽  
Two Phase ◽  
Ansys Cfx ◽  
Priming Process

A self-priming centrifugal pump can be used in various areas such as agricultural irrigation, urban greening, and building water-supply. In order to simulate the gas-water two-phase flow in the self-priming process of a self-priming centrifugal pump, the unsteady numerical calculation of a typical self-priming centrifugal pump was performed using the ANSYS Computational Fluid X (ANSYS CFX) software. It was found that the whole self-priming process of a self-priming pump can be divided into three stages: the initial self-priming stage, the middle self-priming stage, and the final self-priming stage. Moreover, the self-priming time of the initial and final self-priming stages accounts for a small percentage of the whole self-priming process, while the middle self-priming stage is the main stage in the self-priming process and further determines the length of the self-priming time.

Investigation of the Self-Priming Process of Self-Priming Pump Under Gas-Liquid Two-Phase Condition

2014 ◽  
Author(s):  
Guidong Li ◽  
Yang Wang ◽  
Gang Yin ◽  
Yurui Cui ◽  
Qihong Liang
Keyword(s):  
Two Phase Flow ◽  
Volume Fraction ◽  
Guide Vane ◽  
The Self ◽  
Phase Flow ◽  
Two Phase ◽  
Pump Chamber ◽  
Priming Process ◽  
Gas Volume Fraction ◽  
Gas Volume

The self-priming process of self-priming pump is gas-liquid two-phase flow process with complex internal transient flow. The effect of gas-liquid mixing and separating performances will play a crucial role during self-priming process. In order to study the self-priming process and improve the self-priming performance, the model named JETST-100 was selected. Based on Eulerian-Eulerian multiphase flow model, transient numerical simulation of the gas-liquid mixing and separating phenomena on the pump chamber was carried out by using CFX software. The distributions of velocity vector, contours of gas volume fraction and liquid velocity of the pump or jet aerator, and the change of the gas volume fraction by monitoring points on the jet aerator were obtained. Test and simulation results show that the gas-liquid two-phase flow from the guide vane will form a larger velocity circulation, so that the gas-liquid separation is not sufficient. And the volume fraction of liquid inside pump chamber decrease with a large amount of water enters the outlet pipe. It is found that adding the baffle plate can prevent the generation of circulation on guide vane back, the gas-phase volume fraction of jet aerator inlet and nozzle outlet decreases, improve the self-priming performance of the pump.

Numerical Study of the Single-Phase and Two-Phase Flow in a Centrifugal Pump

2013 ◽  
Vol 307 ◽  
pp. 215-218
Author(s):  
Te Ba ◽  
Arthur Teck Bin Lim ◽  
Chang Wei Kang
Keyword(s):  
Centrifugal Pump ◽  
Single Phase ◽  
Transient Flow ◽  
Two Phase Flow ◽  
Numerical Study ◽  
Flow Simulation ◽  
Phase Flow ◽  
Two Phase ◽  
Normal Mass ◽  
Phase Water

The paper presents the numerical investigation of a radial flow centrifugal pump with 2D curvature blade geometry. The geometry is based on the experimental equipment by Anagostopulos. Single phase (water) flow is modeled with a normal mass flow rate and rotation speed. Pressure distribution and fluid streamlines are evaluated and visualized. An extension of the model to transient flow and two-phase flow simulation has been done to see the effect of impeller rotation and gas entrainment in the centrifugal operation procedure.

Experimental analysis of two-phase flow in a radial centrifugal pump

2017 ◽  
Author(s):  
Henrique Stel ◽  
Edgar Ofuchi ◽  
Dalton Bertoldi ◽  
Moisés Marcelino Neto ◽  
Rigoberto Morales ◽  
...  
Keyword(s):  
Centrifugal Pump ◽  
Experimental Analysis ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

NUMERICAL EVALUATION OF THE TWO-PHASE FLOW IN A RADIAL CENTRIFUGAL PUMP

2018 ◽  
Author(s):  
Carlos Eduardo Ribeiro Santa Cruz Mendoza ◽  
Rafael Dunaiski ◽  
Edgar Ofuchi ◽  
Henrique Stel ◽  
Rigoberto Morales
Keyword(s):  
Centrifugal Pump ◽  
Numerical Evaluation ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

A Method for Correlating the Characteristics of Centrifugal Pumps in Two-Phase Flow

1978 ◽  
Vol 100 (4) ◽  
pp. 395-409 ◽  
Author(s):  
Jaroslaw Mikielewicz ◽  
David Gordon Wilson ◽  
Tak-Chee Chan ◽  
Albert L. Goldfinch
Keyword(s):  
Centrifugal Pump ◽  
Two Phase Flow ◽  
Flow Direction ◽  
Semiempirical Method ◽  
Head Loss ◽  
Phase Flow ◽  
Loss Ratio ◽  
Centrifugal Pumps ◽  
Reversed Flow ◽  
Two Phase

The semiempirical method described combines the ideal performance of a centrifugal pump with experimental data for single and two-phase flow to produce a so-called “head-loss ratio,” which is the apparent loss of head in two-phase flow divided by the loss of head in single-phase flow. This head-loss ratio is shown to be primarily a function of void fraction. It is demonstrated that the measured characteristics of a centrifugal pump operating in two-phase flow in normal rotation and normal and reversed flow directions (first and second -quadrant operation) and in reversed rotation and reversed flow direction (third-quadrant operation) can be reproduced with acceptable accuracy.

Numerical study on two-phase flow through fractured porous media

2011 ◽  
Vol 54 (9) ◽  
pp. 2412-2420 ◽  
Author(s):  
ZhaoQin Huang ◽  
Jun Yao ◽  
YueYing Wang ◽  
Ke Tao
Keyword(s):  
Porous Media ◽  
Two Phase Flow ◽  
Numerical Study ◽  
Fractured Porous Media ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Through
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