Results 21 to 30 of about 5,160 (221)

CFD Investigation for Surface Roughness Effects on the Hydrodynamics of Cavitating Turbulent Flow through a Low Head Prototype Francis Turbine [PDF]

Journal of Applied Fluid Mechanics, 2022
Surface characteristics have an important role in defining hydrodynamics of the flow through hydraulic machines. Surface roughness is a critical parameter that contributes to altering near-wall flow features and promotes frictional losses in various ...
G. Tiwari, J. Kumar, V. Prasad, V. K. Patel   +3 more
doaj   +1 more source

Numerical study of the influence of blade inlet design parameters on the internal flow characteristics and energy performance of a Francis turbine

AIP Advances, 2023
One of the challenges of hydraulic turbine design is the creation of a conveyor with high hydraulic performance in accordance with the parameters of the hydraulic energy.
Xiaoming Chen, Kaige Wu, Peng Shu, Qiuyu Chen, Qiuqin Gou   +4 more
doaj   +1 more source

Stability Analysis of Vaneless Space in High-Head Pump-Turbine under Turbine Mode: Computational Fluid Dynamics Simulation and Particle Imaging Velocimetry Measurement

Machines, 2022
When the Francis-type reversible pump-turbine runs under partial load, the pressure pulsation amplitude and frequency in vaneless space are high, posing a serious threat to the stability of unit operation.
Wanquan Deng, Lianchen Xu, Zhen Li, Wen Tang, Xiaolong Wang, Linmin Shang, Demin Liu, Xiaobing Liu   +7 more
doaj   +1 more source

Performance Analysis of a Francis Turbine under Various Operating Conditions using CFD [PDF]

E3S Web of Conferences
Hydropower is one of the most efficient renewable energy technologies. The reaction turbines have application in very wide range of hydro power projects. The turbines are main important components of any hydro power plant.
Kumar Prashant, Singal Sunil Kumar, Gohil Pankaj   +2 more
doaj   +1 more source

Optimisation of Combustor Wall Heat Transfer and Pollutant Emissions for Preliminary Design Using Evolutionary Techniques [PDF]

, 2003
This paper presents the concept and application of a design optimisation toolbox, based upon evolutionary techniques, for the preliminary design of a gas turbine combustor.
Rubini, Philip A., P. A. Rubini, J. M. Rogero, Rogero, J. M.   +3 more
core   +1 more source

Analysis on Hydraulic Design of Runner Blades of Francis Turbine

, 2023
Francis turbine is the most widely used model in hydropower station, and the hydraulic design of runner blades affects the efficiency of the unit. This paper discusses how to complete the hydraulic design of Francis turbine runner blades according to the
Yang, Jing
core   +2 more sources

Numerical research of cavitation on Francis turbine runners

International Journal of Hydrogen Energy, 2017
Francis turbines, as other hydraulic turbines, are custom-designed for nominal operating conditions specific to each power plant. However, they may need to be operated at off design flow conditions because of variable reservoir levels and flowrates. Operating the turbine at off-design points can cause cavitation.
Kutay Celebioglu, Burak Altintas, Selin Aradag, Yigit Tascioglu   +3 more
openaire   +4 more sources

Rehabilitation of Francis Turbines of Power Plants with Computational Methods

Hittite Journal of Science and Engineering, 2018
Rehabilitation of existing hydroelectric power plants HEPP by redesigning the hydraulic turbines is usually more elaborate than designing a tailor-made turbine for a new plant.
Selin Aradag, Burak Altintas, Kutay Celebioglu, Ece Ayli   +3 more
doaj   +1 more source

Multidisciplinary optimization of a Francis turbine runner [PDF]

, 2022
A fully automated multi-disciplinary design optimization procedure for a Francis turbine runner has been developed in a previous task of the Horizon2020-HydroFlex project.
Jordal, Maria, Iliev, Igor, Tengs, Erik Os, Charrassier, Flora   +3 more
core   +1 more source

Influence of Axial Installation Deviation on the Hydraulic Axial Force of the 1000 MW Francis Runner in the Rated Operating Condition

Energies, 2023
To study the influence of the axial installation deviation of the runner on the hydraulic axial force of the 1000 MW Francis turbine unit, geometric models of the full flow passage of the Francis turbine with the runner sinking in the axial direction by ...
Yongsheng Liu, Chengming Liu, Yongsheng Zhang, Xingxing Huang, Tao Guo, Lingjiu Zhou, Zhengwei Wang   +6 more
doaj   +1 more source