Results 51 to 60 of about 632 (187)
Rare‐Earth‐Free Iron‐Based Permanent Magnets: Progress, Challenges, and Perspectives
MetalMat, Volume 2, Issue 4, December 2025.Rare‐earth (RE)‐free iron‐based permanent magnets have gained attention as inexpensive, environmentally friendly alternatives to conventional RE‐based magnets. This review focuses on emerging Fe‐based hard magnets, discussing the fundamental principles governing their permanent magnetism and various examples of Fe‐based systems with emphasis on their ...
Sunbeom Park +4 more
wiley +1 more source
Solid–Liquid Flow Analysis of Francis‐99 Turbine Runner: Effects of Sediment Concentration
Energy Science & EngineeringThis study examines the behavior of solid–liquid two‐phase flow within the runner of the Francis‐99 turbine. Numerical simulations were carried out by Ansys Fluent software using the Mixture multiphase flow model along with the Realizable k‐ε turbulence ...
Kang Xu +6 more
doaj +1 more source
Journal of Applied Fluid Mechanics, 2020 In a Francis turbine, the guide vanes are arranged in the direction of flow behind the stay vanes. And as it is generally believed that the outlet angle of water after it flows through the spiral case and stay vanes is fixed, the flow and flow ...
Z. J. Wu, W. K. Liang, W. Dong
doaj
Effect of Guide Vane Clearance Gap on Francis Turbine Performance
Energies, 2016 Francis turbine guide vanes have pivoted support with external control mechanism, for conversion of pressure to kinetic energy and to direct them to runner vanes.
Ravi Koirala +2 more
doaj +1 more source
Thunderbird International Business Review, Volume 67, Issue 6, Page 665-679, November/December 2025.ABSTRACT Non‐Chinese multinational enterprises (MNE) are wondering whether China's Belt and Road Initiative (BRI) in Sub‐Saharan Africa (SSA) creates challenges or opportunities for them. The fuzzy term “third‐party market cooperation” was coined to involve non‐Chinese MNEs in BRI‐related business opportunities. Our contribution is threefold: First, we
Philipp von Carlowitz, Simon Züfle
wiley +1 more source
Wind Energy, Volume 28, Issue 11, November 2025.ABSTRACT Significant variations in tonality levels are frequently observed among nominally identical wind turbine drivetrains, both in industrial test setups and during field operations, posing challenges to compliance with noise emission standards. This work delves into the influence of production and assembly variations on static transmission error ...
Bart De Smet +5 more
wiley +1 more source
CFD Analysis in Francis Turbine Performance- A Review
Journal of Advanced Mechanical Sciences, 2022 In any hydro power plant its turbine enacts a major role in deciding the competence as lot of phenomena depends on it if turbine works smoother then performance achieved by plant will be more and for that analysis of turbine becomes a need of the time ...
Akash Gupta
doaj
PREDICTION OF EROSION EFFECT DUE TO CAVITATION ON AL-MOSUL POWER PLANT TURBINE
Journal of Engineering, 2008 In the field of hydraulic power plant, the cavitation is responsible of sever erosion which requires periodic unit shutdowns for inspection and repairs. Al-Mosul hydroelectric power plant is chosen as model in this study. Computer programs are developed
Jafar M. Hassan, Laith W. Ismail
doaj +1 more source
Journal of Fish Diseases, Volume 48, Issue 11, November 2025.ABSTRACT Currently, diagnosis of gas bubble disease (GBD) in fish relies on visual observations of bubbles in various body parts and exophthalmus. These observations lack quantified information about gas bubble load, limiting their diagnostic value.
S. Stensby‐Skjærvik +9 more
wiley +1 more source
Open Engineering, 2019 The article presents the results of experimental and numerical tests of a water turbine. As the object of the research the middle size Francis turbine, characterized by a middle value of specific speed, was taken into consideration.
Szulc Przemyslaw, Machalski Artur
doaj +1 more source