Results 21 to 30 of about 3,051 (232)
1D simulation of pump-turbine transition [PDF]
Journal of Physics: Conference Series, 2017 Variable speed motor-generators based on full size converter offer new options for operation of reversible pump-turbines. To explore the challenges related with this new technology a specific test rig configuration is developed to perform such transition with a PT reduced scale model.
N Ruchonnet, O Braun
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Research on configuration and performance of water ramjet pressurized water intake system
Xibei Gongye Daxue Xuebao, 2023 Water ramjet is the most ideal power propulsion device for high-speed underwater weapons. However, failure to start it at low-speed makes it hard for the engine to be widely used.
YANG Hao +5 more
doaj +1 more source
Optimal parameters of elliptical groove gas film face seal with bidirectional rotational characteristics [PDF]
International Journal of Fluid EngineeringThe performance of gas film face seals is substantially affected by the geometric features of the texture on the seal face. To enhance the design of elliptical groove face seals for efficient bidirectional rotation, a comprehensive theoretical analysis ...
Yuansen Song +3 more
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Energies, 2022 It is not uncommon for pump-turbine units in pumped storage power plants to experience load rejections due to the sudden disconnection of the generator from the power grid.
Xingxing Huang +7 more
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Compressible Simulation of Rotor-Stator Interaction in Pump-Turbines [PDF]
International Journal of Fluid Machinery and Systems, 2010 This work investigates the influence of water compressibility on pressure pulsations induced by rotor-stator interaction (RSI) in hydraulic machinery, using the commercial CFD solver ANSYS-CFX. A pipe flow example with harmonic velocity excitation at the inlet plane is simulated using different grid densities and time step sizes.
J Yan, J Koutnik, U Seidel, B Hübner
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Complexity, 2020 Energy contributes significantly in almost all aspects of human life as well as economic activities and plays a crucial role in the infrastructural development of a county to alleviate poverty.
Du Jianguo +4 more
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Measuring the Dynamic Characteristics of a Low Specific Speed Pump—Turbine Model
Energies, 2016 This paper presents results from an experiment performed to obtain the dynamic characteristics of a reversible pump-turbine model. The characteristics were measured in an open loop system where the turbine initially was run on low rotational speed before
Eve Cathrin Walseth +2 more
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Selective hydrometallurgical recovery of gold by using low-cost biomass waste: Kiwi peel
Adsorption Science & TechnologyUtilization of kiwi peel (KP) is proposed for gold recovery from electronic wastes (e-wastes). KP was simply modified by dehydration pretreatment with concentrated sulfuric acid.
Dan Yu, Xiaomei Guo, Yang Liu
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Cavitation measurements on a pump-turbine model
Journal of Physics: Conference Series, 2015 When a hydraulic turbine is operated at off-design conditions, cavitation on the runner and other machine parts can occur. Vibration, noise and erosion caused by cavitation can damage the turbine and lead to a limitation of the operational range. To avoid damage of the turbine, it is fundamental to get knowledge of the presence of cavitation.
H Schmidt, O Kirschner, S Riedelbauch
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Biodegradable and Biocompatible Functional Polymers for Biomedical Applications
Advanced Functional Materials, EarlyView.Biodegradable and biocompatible functional polymers integrate electrical, mechanical, and stimuli‐responsive functionalities while enabling programmed degradation under physiological conditions. This review introduces recent advances in conductive, shape‐memory, self‐healing, photocurable, and adhesive polymer systems, emphasizing material design ...
Won Bae Han +5 more
wiley +1 more source