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Journal

Journal of Applied Fluid Mechanics

ISSN: 1735-3572    EISSN: 1735-3645

www.jafmonline.net

Editor-in-chief

Prof. Ebrahim Shirani

Email: director@jafmonline.net

Co-Editor

Dr. Ahmad Reza Pishevar

Editorial Manager

Dr. Mohammad Reza Tavakoli

Secretary of JAFM

Mrs. Shakiba Rostami

 

JAFM is an open access, peer-reviewed online journal with a scope that covers all aspects of theoretical, numerical and experimental fluid mechanics. The emphasis is on the applied rather than purely mathematical aspects of fluid mechanics.

 

JAFM offers a rapid and high quality peer-review process overseen by its distinguished international Editorial Board. The journal benefits from an efficient online submission process and online publication upon acceptance.

 

JAFM papers are freely available and the accepted papers are published free of cost.

 


For further assistance for submitting manuscripts, the JAFM secretary may be contacted by the following email address: secretary@jafmonline.net.

 

 

Most Viewed Papers
Vol9 , No 1
Back to list
Title : Numerical Study of Cavitation in Francis Turbine of a Small Hydro Power Plant
Pages : 357-365
Authors : Pankaj Gohil,  Rajeshwer Saini, 
Anstract : Cavitation is undesirable phenomena and more prone in reaction turbines. It is one of the challenges in any hydro power plant which cause vibration, degradation of performance and the damage to the hydraulic turbine components. Under the present study, an attempt has been made to carry out a numerical analysis to investigate the cavitation effect in a Francis turbine. Three dimensional numerical study approach of unsteady and SST turbulence model are considered for the numerical analysis under multiphase flow such as cavitating flow. The performance parameters and cavitating flow under different operating conditions have been predicted using commercial CFX code. Three different operating conditions under cavitation and without cavitation with part load and overload conditions of the turbine for a plant sigma factor are investigated. The results are presented in the form of efficiency, pressure fluctuation, vortex rope and vapor volume fraction. It has been observed that variation in efficiency and vapor volume fraction is found to be nominal between cavitation and without cavitation conditionsat rated discharge and rated head. Turbine efficiency loss and vapor bubbles formation towards suction side of the runner blade are found to be maximum under overload condition. However, the pressure pulsation has been found maximum under part load condition in the draft tube. The simulation results are found to be in good agreement with model test results for efficiency. The locations of cavitating zone observed wellwith the result of previous studies.
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