Results 11 to 20 of about 291,495 (261)
Improvement of hydro-turbine draft tube efficiency using vortex generator
Advances in Mechanical Engineering, 2015 Computational fluid dynamics simulation was employed in a hydraulic turbine (from inlet tube to draft tube). The calculated turbine efficiencies were compared with measured results, and the relative error is 1.12%.
Xiaoqing Tian +3 more
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Mathematics, 2022 The installation of new and revitalization of existing hydropower requires the optimal design of hydraulic turbine parts, which were previously mostly based on simplified analytical methods and engineering practices.
Ivana Lučin +3 more
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Renmin Zhujiang, 2023 In order to explore the influence of the opening of the movable guide vane on the flow and pressure pulsation in the draft tube of the Francis turbine,the steady and unsteady numerical simulations were carried out by establishing a three-dimensional full-
REN Haibo, YU Bo, WANG Kui, WANG Luobin
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Effect of draft tube diameter on nitrogen removal from domestic sewage in a draft tube type reactor
Water Science and Technology, 1998 The effect of the ratio of draft tube diameter to reactor diameter (Di/Do) on the efficiency of nitrogen removal from domestic sewage is discussed based on liquid-circulating flow rate and continuous treatment data. More than 2.5 minutes of circulation time in the annulus part, which is required to create an anoxic zone, could be maintained under ...
Yoshio Okuno +3 more
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Computational fluid dynamics simulation and geometric design of hydraulic turbine draft tube
Advances in Mechanical Engineering, 2015 Any hydraulic reaction turbine is installed with a draft tube that impacts widely the entire turbine performance, on which its functions are as follows: drive the flux in appropriate manner after it releases its energy to the runner; recover the suction ...
JB Sosa +3 more
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Energies, 2022 The vortex rope in the draft tube is considered as the major contributor to pressure pulsation at partial load (PL) conditions, which causes the hydro unit to operate unstably.
Zhumei Luo +4 more
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MATEC Web of Conferences, 2017 The free discharge through the turbine is applied in the course of construction of hydro power plant or in case of excessive water inflow during floods or emergency situations.
Platonov Dmitry +2 more
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CFD Modeling of Hydrocarbon-Air System Hydrodynamics in Three Types of Column Reactors [PDF]
Iranian Journal of Chemical Engineering, 2020 In this study, hydrodynamic characteristics such as gas holdup (ε), liquid phase velocity, and mass transfer coefficient (kLa) for air-diesel system were modeled for bubble column (BCR), airlift (ALR), and airlift with the net draft tube (ALR-NDT ...
H. Faraji, A.R. Habibi, E. Jalilnejad
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Numerical and Experimental Study on a Model Draft Tube with Vortex Generators
Advances in Mechanical Engineering, 2013 A model water turbine draft tube containing vortex generators (VG) was studied. Numerical simulations were performed to investigate 55 design variations of the vortex generators in a draft tube.
Tian Xiaoqing +3 more
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Revista Facultad de Ingeniería Universidad de Antioquia, 2013 Severe vibrations are present on the draft tube of a 95 MW hydraulic turbine operating at partial load. Frequent failures on structural elements of the power plant are produced, due to the hydraulic instability inside the draft tube; mainly when the ...
Fernando Casanova García +1 more
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