Results 41 to 50 of about 650 (181)

Adaptive Turbine Replacement Improves Hydropower Flexibility in a Changing Climate

Water Resources Research, Volume 62, Issue 8, August 2026.
Abstract Hydropower plants will operate under new conditions as water regimes shift, reservoir operating rules evolve, and the grid requires flexible balancing of wind and solar. Hydropower plant turbine systems are traditionally designed to operate at the highest efficiency within narrow ranges of flow and reservoir levels while deviations from design
Veysel Yildiz, Nathalie Voisin, Marta Zaniolo   +2 more
wiley   +1 more source

Internal flow characteristics in the draft tube of a Francis turbine under different working conditions

Advances in Mechanical Engineering
The Francis turbine stability is impacted significantly by the flow characteristics in its draft tube. In the case of a Francis turbine in a hydropower plant, numerical simulations were undertaken at the maximum and rated heads, respectively, under three
Yuanhang Hou, Xiaobing Liu, Ming Xiao, Haibin Zhang, Yinhui Cai, Yongzhong Zeng, Lei Zou, Jiayang Pang   +7 more
doaj   +1 more source

Flow Modeling in the Wake of a Francis Turbine with Hydraulic Charge: Case of Songloulou-Cameroon [PDF]

Journal of Applied Fluid Mechanics
Cavitation in hydraulic installations is still a major concern when it comes to producing electricity. We are aware of the danger of cavitation and the damage it can cause.
R. D. Wafo, M. Tientcheu-Nsiewe, D. Tcheukam-Toko, B. Kenmeugne, A. Kuitche   +4 more
doaj   +1 more source

Microstructure Engineering Toward High Cost‐Effective Nd–Fe–B Sintered Magnets: A Review

Rare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Nd–Fe–B sintered magnets, critical for enhancing electromechanical conversion efficiency and operational stability in wind turbines and electric vehicle drives, are prized for their outstanding coercivity, high remanence, and superior maximum energy product.
Dongmin Zhang, Minggang Zhu, Xu Sun, Qisong Sun, Xiaolong Song, Jingyan Zuo   +5 more
wiley   +1 more source

Cerebral oxygenation and skeletal muscle responses to time trial, maximal oxygen uptake and time to exhaustion exercise

Experimental Physiology, Volume 111, Issue 7, Page 3267-3279, 1 July 2026.
Abstract This study investigated cerebral and neuromuscular responses to three exercise models: time trial (TT), maximal oxygen uptake (V̇O2max${{\dot{V}}_{{{{\mathrm{O}}}_2}{\mathrm{max}}}}$) and time to exhaustion (TTE). Fourteen participants completed the tests in the following order: V̇O2max${{\dot{V}}_{{{{\mathrm{O}}}_2}{\mathrm{max}}}}$, TT and ...
Caroline V. Robertson, Nicole T. Vargas, Tegan Hartmann, Frank E. Marino   +3 more
wiley   +1 more source

Numerical analysis of solid–liquidtwo-phase turbulent flow in Francis turbine runner with splitter bladesin sandy water

Advances in Mechanical Engineering, 2015
As the key component of a hydroelectric power generation system, hydraulic turbine plays a decisive role in the overall performance of the system. There are many sandy rivers in the world, and turbines working in these rivers are seriously damaged ...
Hua Hong, Zeng Yong-Zhong, Wang Hui-Yan, Ou Shun-Bing, Zhang Zhi-Zhong, Liu Xiao-Bing   +5 more
doaj   +1 more source

Influence of 3D Guide Vanes on the Channel Vortices in the Runner of a Francis Turbine

Journal of Fluid Science and Technology, 2006
It is known that the pressure fluctuation in the runner will become large when a Francis turbine operates at the low flow rate and high head. One of the reasons is the occurrence of channel vortices, which are caused by the three-dimensional flow ...
Shuhong LIU, Liang ZHANG, Yulin WU, Xianwu LUO, Michihiro NISHI   +4 more
doaj   +1 more source

Vulnerability of Bats in Australia to Wind Turbine Mortality: A Trait‐Based Assessment

Austral Ecology, Volume 51, Issue 6, June 2026.
ABSTRACT Wind turbine collisions are a leading cause of bat mortality globally, yet the vulnerability of Australian bat taxa remains poorly understood. Trait‐based assessments offer a valuable method for evaluating mortality risk in the absence of data on species‐ and region‐specific turbine interactions.
Carissa V. Harris, Christopher Turbill
wiley   +1 more source

Mayfly Taxonomic and Functional Diversity in Anthropogenically Impacted Riverine Habitats: Influence of Habitat Morphology, Water Parameters and Fish Assemblages

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 5, May 2026.
ABSTRACT Freshwater habitats are globally threatened by various anthropogenic pressures, resulting in reduced habitat quality and diminished biodiversity. Due to their sensitivity to environmental change, mayflies are commonly used in biomonitoring programs worldwide.
Marina Vilenica, Ivana Grgić, Fran Rebrina, Marko Ćaleta, José Manuel Tierno de Figueroa, Manuel Jesús López‐Rodríguez, Andreja Brigić, Perica Mustafić, Zlatko Mihaljević   +8 more
wiley   +1 more source

High resolution data reveal fundamental steps and turns in animal movements

Ecological Monographs, Volume 96, Issue 2, May 2026.
Abstract Animal movement paths display substantial complexity and variability, promoting efforts to identify universal rules and models that best describe them. Using high‐resolution (≥10 Hz) movement from 43 vertebrate species spanning diverse taxa, body sizes, and lifestyles, we show that paths are universally composed of straight‐line steps ...
Richard M. Gunner, Rory P. Wilson, Miguel Lurgi, Luca Börger, James Redcliffe, Emily L. C. Shepard, Mark D. Holton, Margaret C. Crofoot, Abdulaziz Alagaili, Samantha Andrzejaczek, Daniel Ariano‐Sánchez, Thomas Barbedette‐Gerard, Nigel C. Bennett, Alice Bernard, Rowan Brown, Nik Cole, Scott Creel, Ariovaldo P. Cruz‐Neto, Agustina di Virgilio, Carlos M. Duarte, Christophe Eizaguirre, Kyle H. Elliott, Monika Faltusova, Mathieu Garel, Natasha Gillies, Adrian C. Gleiss, Aoife Göppert, David Grémillet, Sophie de Grissac, Tim Guilford, Maxime Hoareau, Mark Jessopp, Agustina Gómez‐Laich, Milos Jezek, Sergio A. Lambertucci, Pascal Marchand, Nikki Marks, Andréia Martins, Mark Meekan, Yuichi Mizutani, Rasmus M. Mortensen, Bradley M. Norman, Josue Ortega, Oliver Padget, Michael Painter, Aurore Ponchon, Pascal Provost, Aurélien Prudor, Flavio Quintana, Stefanie Reinhardt, Samantha D. Reynolds, Frank Rosell, Carlos R. Ruiz‐Miranda, Peter G. Ryan, David M. Scantlebury, Stefan Schoombie, Rebecca Scott, Vaclav Silovsky, Jeroen Steenbeek, Vikash Tatayah, Carole Toïgo, Lucia Torrez, Fred Tremblay, Joshua P. Twining, Ken Yoda, Henri Weimerskirch, Shannon Whelan, Juan M. Morales, Jonathan R. Potts   +68 more
wiley   +1 more source