Results 21 to 30 of about 6,231 (266)
Hydrodynamic and experimental characterization of pumps as turbines
Dyna, 2023 To estimate the performance, efficacy, modes of operation, hydrodynamic instabilities, and methodologies for harnessing energy from the pump as turbine (PAT), it is necessary to characterize these hydraulic turbomachines in all their modes of operation ...
Daniel Felipe Tobón-Espinosa +3 more
doaj +1 more source
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
Dynamic safety assessment of a nonlinear pumped-storage generating system in a transient process [PDF]
, 2019 This paper focuses on a pumped-storage generating system with a reversible Francis turbine and presents an innovative framework for safety assessment in an attempt to overcome their limitations.
Abbassi, Rouzbeh +8 more
core +4 more sources
Nonlinear Modeling of Dynamic Characteristics of Pump-Turbine [PDF]
Energies, 2022 Hydropower is a kind of clean energy, which can effectively reduce the consumption of fossil energy and is one of the main fields of new energy development. Pumped storage power station not only provides a solution for storing electric energy and generating excess, but also is a clean, efficient, economical and safe power system regulation method with ...
Liying Wang, Kaidi Zhang, Weiguo Zhao
openaire +2 more sources
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
doaj +1 more source
Influence of the boundary conditions on the natural frequencies of a Francis turbine [PDF]
, 2016 Natural frequencies estimation of Francis turbines is of paramount importance in the stage of design in order to avoid vibration and resonance problems especially during transient events.
Bossio, Matias +5 more
core +1 more source
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
doaj +1 more source
Hydraulic Analysis of a Reversible Fluid Coupling [PDF]
, 2000 This paper presents a hydraulic analysis of a fluid coupling which is designed to operate either in a forward or reverse mode when a set of turning vanes are respectively withdrawn or inserted into the flow between the driving and driven rotors.
Brennen, Christopher E. +2 more
core +1 more source
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
doaj +1 more source
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
doaj +1 more source