Results 11 to 20 of about 2,888 (220)
Hydrodynamic optimization of pump-turbine runner [PDF]
E3S Web of Conferences, 2023 The paper suggests the approach to automatic CFD-based optimization of the pump-turbine runner. An in-house 3D flow solver CADRUN is used for the solution of steady-state RANS equations and evaluation of objective functions in representative operating ...
Chirkov Denis +4 more
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The acceleration effect of pump as turbine system during starting period
Scientific Reports, 2023 In order to reveal the influence of starting acceleration on starting process of a pump as turbine system, this paper carries out a numerical calculation of the three-dimensional viscous unsteady flow of pump as turbine circulating piping system under ...
Yu-Liang Zhang, Jin-Fu Li, Zu-Chao Zhu
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Energies, 2022 The heat pump system has been widely used in residential and commercial applications due to its attractive advantages of high energy efficiency, reliability, and environmental impact.
Abbas Aghagoli +2 more
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Internal Flow Phenomena of Two-Way Contra-Rotating Axial Flow Pump-Turbine in Pump Mode under Variable Speed [PDF]
Journal of Applied Fluid Mechanics, 2022 This paper investigated the variable speed operation of a two-way contra-rotating axial flow pump–turbine in pump mode. When counter-rotating impellers operate at the same speed, a significant difference exists in the shaft power of the two impellers ...
C. An +5 more
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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
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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
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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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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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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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