Results 31 to 40 of about 38,835 (280)

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, Arzaghi, Ehsan, Caraballo Garrido, Tomás, Chen, Diyi, Gao, Xiang, Kilicman, Adem, Li, Huanhuan, Patelli, Edoardo, Xu, Beibei   +8 more
core   +4 more sources

Analysis of Flow and Pressure Pulsation in Draft Tube of Francis Turbine under Different Guide Vane Opening

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  

An ontology framework for developing platform-independent knowledge-based engineering systems in the aerospace industry [PDF]

, 2014
This paper presents the development of a novel knowledge-based engineering (KBE) framework for implementing platform-independent knowledge-enabled product design systems within the aerospace industry.
Sanya, I. O., Shehab, Essam
core   +1 more source

Experimental Investigation and Performance Characteristics of Francis Turbine with Different Guide Vane Openings in Hydro Distributed Generation Power Plants

Energies, 2022
This article presents a study on the performance characteristics of a Francis turbine operating with various guide vane openings to determine the best operating point based on unit quantities.
Megavath Vijay Kumar, T. Subba Reddy, P. Sarala, P. Srinivasa Varma, Obbu Chandra Sekhar, Abdulrahman Babqi, Yasser Alharbi, Basem Alamri, Ch. Rami Reddy   +8 more
doaj   +1 more source

Advanced Ceramics in Aerospace and Defense: The Interrelationship between Traditional and Additive Manufacturing Approaches

Advanced Materials Technologies, EarlyView.
Additive manufacturing revolutionizes production by enabling on‐demand, customized, and sustainable manufacturing with streamlined supply chains. While metal and polymer AM are well‐established, advanced ceramic AM is rapidly emerging, overcoming traditional material challenges.
Kateryna Oleksandrivna Shvydyuk, Senentxu Lanceros‐Mendez, Abílio Pereira Silva   +2 more
wiley   +1 more source

Comparative Numerical Studies for the Flow Energy Dissipation Features in a Vertical Two‐Stage Centrifugal Pump in Pump and Turbine Conditions

Energy Science &Engineering, EarlyView.
Based on entropy theory, this study presents a comparative numerical analysis of the flow energy dissipation (FED) in a VTSP under two distinct operating conditions: pump condition and turbine condition, both characterized by relatively high hydraulic efficiencies of 88.9% and 87.4%, respectively. In pump condition, the highest FED production occurs in
S. Liu, T. P. Chen, Y. Li, M. Q. Liang, Y. J. Zhang, X. Z. Wei   +5 more
wiley   +1 more source

Do not be Afraid of Small High-Speed Francis Turbines

Journal of Mechanical Engineering, 2018
In the first quarter of the last century hydraulic power plants were equipped with high-speed Francis turbines even in the situation when a contemporary project manager would suggest Kaplan turbine. The reason is simple. Mr.
Libor Koudelka
doaj   +1 more source

Francis turbine runner design [PDF]

, 2008
Tato diplomová práce slouží jako podklad pro rekonstrukci malé vodní elektrárny Harta. Součástí této rekonstrukce je detailní zpracování lopatkování oběžného kola na základě hydraulického návrhu na dané parametry lokality.
Žák, Radim
core  

Bioclimatic, demographic and anthropogenic correlates of grizzly bear activity patterns in the Greater Yellowstone Ecosystem

Oikos, EarlyView.
Plasticity of diel activity rhythms may be a key element for adaptations of wildlife populations to changing environmental conditions. In the last decades, grizzly bears Ursus arctos in the Greater Yellowstone Ecosystem (GYE) have experienced notable environmental fluctuations, including changes in availability of food sources and severe droughts ...
Aurora Donatelli, Mark A. Haroldson, Justin G. Clapp, Paolo Ciucci, Frank T. van Manen   +4 more
wiley   +1 more source

Flow-Induced Strength Analysis of Large Francis Turbine Under Extended Load Range

Applied Sciences
To meet the load requirements of the power grid, the hydroelectric power plants need to extend the operational load range of the turbine units, which are often operated under off-design operating conditions.
Xingping Liu, Xingxing Huang, Weijiang Chen, Zhengwei Wang   +3 more
doaj   +1 more source