Results 21 to 30 of about 2,868 (215)

Optimal parameters of elliptical groove gas film face seal with bidirectional rotational characteristics [PDF]

International Journal of Fluid Engineering
The 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, Xiaomei Guo, Hyunjong Kim, Gomaa Ahmed   +3 more
doaj   +1 more source

Stress Characteristic Analysis of Pump-Turbine Head Cover Bolts during Load Rejection Based on Measurement and Simulation

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, Liu Chen, Zhengwei Wang, Haibo Li, Shunyi Chen, Kun Hu, Chengjun Li, Lan Qiu   +7 more
doaj   +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, Torbjørn K. Nielsen, Bjørnar Svingen   +2 more
doaj   +1 more source

Computational Analysis on Numerical Simulation of Internal Flow Physics for Pump as Turbine in Renewable Small Hydro Energy Generation

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, Daniel Adu, Emmanuel Acheaw, Shakir Hafeez, Eric Ofosu Antw   +4 more
doaj   +1 more source

Transient Flow-Induced Stress Investigation on a Prototype Reversible Pump–Turbine Runner

Energies
Pump–turbine units with high heads are subjected to strong pressure pulsations from the unsteady transient flow in fluid channels, which can produce severe vibrations and high stresses on the pump–turbine structural components.
Dehao Zhang, Qiang Quan, Xingxing Huang, Zhengwei Wang, Biao Wang, Yunfeng Xiao   +5 more
doaj   +1 more source

Optimized Blade Design of Counter-Rotating-Type Pump-Turbine Unit Operating in Pump and Turbine Modes

International Journal of Rotating Machinery, 2018
In this study, a counter-rotating-type pump-turbine unit was optimized to improve the pump and turbine mode efficiencies simultaneously. Numerical analysis was carried out by solving three-dimensional Reynolds-averaged Navier–Stokes equations using the ...
Jin-Woo Kim, Jun-Won Suh, Young-Seok Choi, Kyoung-Yong Lee, Toshiaki Kanemoto, Jin-Hyuk Kim   +5 more
doaj   +1 more source

Numerical Analysis on the Hydraulic Thrust and Dynamic Response Characteristics of a Turbine Pump

Energies, 2022
Pumps as turbines are widely used in the world, wherein the hydraulic thrust of a turbine pump is one of the key factors affecting the safe and stable operation of a unit.
Linghua Kong, Jingwei Cao, Xiangyang Li, Xulei Zhou, Haihong Hu, Tao Wang, Shuxin Gui, Wenfa Lai, Zhongfeng Zhu, Zhengwei Wang, Yan Liu   +10 more
doaj   +1 more source

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
openaire   +1 more source

Selective hydrometallurgical recovery of gold by using low-cost biomass waste: Kiwi peel

Adsorption Science & Technology
Utilization 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
doaj   +1 more source

Flow-Induced Vibration of Non-Rotating Structures of a High-Head Pump-Turbine during Start-Up in Turbine Mode

Energies, 2022
Pumped storage-power plants play an extremely important role in the modern smart grid due to their irreplaceable advantages in load peak-valley regulation, frequency modulation, and phase modulation.
Mengqi Yang, Weiqiang Zhao, Huili Bi, Haixia Yang, Qilian He, Xingxing Huang, Zhengwei Wang   +6 more
doaj   +1 more source