Results 21 to 30 of about 1,539,229 (306)
Suppressing the Vortex Rope Oscillation and Pressure Fluctuations by the Air Admission in Propeller Hydro-Turbine Draft Tube [PDF]
Journal of Applied Fluid Mechanics, 2023 For the purpose of automatic generation control (AGC), a portion of the propeller hydro-turbine units in China is adjusted to operate within a restricted range of 75%-85% load using computer-controlled AGC strategies.
H. Wu +9 more
doaj +1 more source
Optimal Design of Double Stage Internal Loop Air-Lift Bioreactor
Energies, 2023 Biorefinery systems play a critical role in the transition towards a sustainable bioeconomy, and bioreactors are a key component in these systems.
Fernando Ramonet +2 more
doaj +1 more source
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
doaj +1 more source
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
doaj
, 2021 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.
S. Khullar +4 more
semanticscholar +1 more source
Processes, 2021 Under low flow-rate conditions, a Francis turbine exhibits precession of a vortex rope with pressure fluctuations in the draft tube. These undesirable flow phenomena can lead to deterioration of the turbine performance as manifested by torque and power ...
Seung-Jun Kim, Yong Cho, Jin-Hyuk Kim
semanticscholar +1 more source
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
openaire +2 more sources
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
doaj +1 more source
Journal of Advanced Marine Engineering and Technology, 2021 In recent times, gravitational water vortex power (GWVP) technology has shown rapid development because of its simple design and adaptability to a wide range of flow conditions, even for low-head hydropower applications. In this study, the performance of
Min-Sung Kim +4 more
semanticscholar +1 more source
Application of multi-objective Bayesian shape optimisation to a sharp-heeled Kaplan draft tube
Optimization and Engineering, 2021 The draft tube of a hydraulic turbine plays an important role for the efficiency and power characteristics of the overall system. The shape of the draft tube affects its performance, resulting in an increasing need for data-driven optimisation for its ...
S. Daniels +4 more
semanticscholar +1 more source