Numerical analysis of flow in a Francis turbine on an equal critical cavitation coefficient line

In this paper, numerical method for predicting critical cavitation performance in a hydraulic turbine is presented. The prediction method is based on unsteady cavitation flow analysis to use bubble two-phase flow model. The prediction of the critical cavitation performance was carried out for the aixal hydraulic turbine and the francis turbine as a typical examples. Results compared to the experiment showed a good agreement for the volume of cavity and the performance drop off and it was recognized that this method could be used as an engineering tool of a hydraulic turbine development.

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Numerical analysis of unsteady flow under high‐head operating conditions in Francis turbine

Engineering Computations ◽

10.1108/02644401011029934 ◽

2010 ◽

Vol 27 (3) ◽

pp. 365-386 ◽

Cited By ~ 23

Author(s):

Xiao Yexiang ◽

Wang Zhengwei ◽

Yan Zongguo ◽

Li Mingan ◽

Xiao Ming ◽

...

Keyword(s):

Numerical Analysis ◽

Unsteady Flow ◽

Operating Conditions ◽

Francis Turbine ◽

High Head

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3D numerical analysis of flow in Francis turbine in sandy river

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/15/3/032053 ◽

2012 ◽

Vol 15 (3) ◽

pp. 032053 ◽

Cited By ~ 3

Author(s):

H K Zhang ◽

X B Liu ◽

Z Liang ◽

D M Liu ◽

H Y Wang

Keyword(s):

Numerical Analysis ◽

Francis Turbine

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CFD: Numerical analysis and performance prediction in Francis turbine

2014 1st International Conference on Non Conventional Energy (ICONCE 2014) ◽

10.1109/iconce.2014.6808697 ◽

2014 ◽

Cited By ~ 2

Author(s):

Pankaj P. Gohil ◽

R.P. Saini

Keyword(s):

Numerical Analysis ◽

Performance Prediction ◽

Francis Turbine ◽

And Performance ◽

Cfd Numerical Analysis

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Numerical Analysis of Erosive Wear on the Guide Vanes of a Francis Turbine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.741.531 ◽

2015 ◽

Vol 741 ◽

pp. 531-535

Author(s):

Hong Ming Zhang ◽

Li Xiang Zhang

Keyword(s):

Numerical Analysis ◽

Volume Fraction ◽

Three Dimensional ◽

Erosive Wear ◽

Francis Turbine ◽

Two Phase ◽

Guide Vanes ◽

Flow Equations ◽

Sand Erosion ◽

Volume Method

The paper presents the numerical analysis of erosive wear on the guide vanes of a Francis turbine using CFD code. The 3-D turbulent particulate-liquid two-phase flow equations are employed in this study. The computing domain is discretized with a full three-dimensional mesh system of unstructured tetrahedral shapes. The finite volume method is used to solve the governing equations and the pressure-velocity coupling is handled via a Pressure Implicit with Splitting of Operators (PISO) procedure. Simulation results have shown that the volume fraction of sand at the top of the guide vanes is higher than others and the maximum of volume fraction of sand is at same location with the maximum of sand erosion rate density. The erosive wear is more serious at the top of the guide vanes.

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