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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/21864
Title: Influence of the runner cone design on the pressure fluctuations in the draft tube of a low head Francis turbine
Authors: Khullar S.
Kumar, Sandeep
Singh, Krishna Mohan
Cervantes M.J.
Gandhi, Bhupendra K.
Published in: IOP Conference Series: Earth and Environmental Science
30th IAHR Symposium on Hydraulic Machinery and Systems, IAHR 2020
Abstract: This paper presents a preliminary numerical investigation on the design of the runner cone for a small turbine test rig under development at IIT Roorkee, India. The test rig is designed to study the formation and mitigation of rotating vortex rope (RVR) in the draft tube of a low head Francis turbine. The original runner cone design needs to be modified to include the provision for axial jet injection. Three different configurations, namely, a truncated cone and two original length cones with different nozzle positions, have been compared with the original cone to choose a suitable one for further investigations. The entire three-dimensional flow passage of the turbine unit has been simulated using the shear stress transport turbulence model after carrying out a mesh independence test on the original design. The proposed designs are compared at three different operating points. The amplitude and frequency of the pressure pulsations in the draft tube have been analyzed using the fast Fourier transform (FFT) method. © Published under licence by IOP Publishing Ltd.
Citation: IOP Conference Series: Earth and Environmental Science (2021), 774(1)
URI: https://doi.org/10.1088/1755-1315/774/1/012110
http://repository.iitr.ac.in/handle/123456789/21864
Issue Date: 2021
Publisher: IOP Publishing Ltd
Keywords: Fast Fourier transforms
Francis turbines
Hydraulic machinery
Shear flow
Shear stress
Turbulence models
Mesh independence
Numerical investigations
Operating points
Pressure fluctuation
Pressure pulsation
Rotating vortex
Shear-stress transport
Three-dimensional flow
Hydraulic motors
ISSN: 17551307
Author Scopus IDs: 57216653256
57201873447
24308174000
55328928400
7006087147
Author Affiliations: Khullar, S., Department of Mechanical and Industrial Engineering, IIT Roorkee, India
Kumar, S., Department of Mechanical and Industrial Engineering, IIT Roorkee, India
Singh, K.M., Department of Mechanical and Industrial Engineering, IIT Roorkee, India
Cervantes, M.J., Division of Fluid and Experimental Mechanics, Department of Engineering Sciences and Mathematics, LTU, Sweden
Gandhi, B.K., Department of Mechanical and Industrial Engineering, IIT Roorkee, India
Funding Details: We would like to show our gratitude to the Central Power Research Institute (CPRI), India, for providing financial assistance to this project under grant no. CPR-1133-MID. The authors are also thankful to Bharat Heavy Electrical Limited (BHEL), India, for sharing the details of turbine design. Central Power Research Institute, CPRI: CPR-1133-MID
Appears in Collections:Conference Publications [CS]
Conference Publications [ME]

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