Results 21 to 30 of about 303,426 (257)

Experimental analysis of the vibration on the draft tube of a Francis hydraulic turbine during operation at different power levels

Revista Facultad de Ingeniería Universidad de Antioquia, 2013
Severe vibrations are present on the draft tube of a 95 MW hydraulic turbine operating at partial load. Frequent failures on structural elements of the power plant are produced, due to the hydraulic instability inside the draft tube; mainly when the ...
Fernando Casanova García, Carlos Alberto Mantilla Viveros   +1 more
doaj   +1 more source

CFD Modeling of Hydrocarbon-Air System Hydrodynamics in Three Types of Column Reactors [PDF]

Iranian Journal of Chemical Engineering, 2020
In this study, hydrodynamic characteristics such as gas holdup (ε), liquid phase velocity, and mass transfer coefficient (kLa) for air-diesel system were modeled for bubble column (BCR), airlift (ALR), and airlift with the net draft tube (ALR-NDT ...
H. Faraji, A.R. Habibi, E. Jalilnejad
doaj   +1 more source

Flow Characteristics of Bulb Tubular Turbine Based on Solid-liquid Two-phase Flow Model [PDF]

Journal of Applied Fluid Mechanics
This study examines the operational efficiency of a bulb tubular turbine under solid-liquid two-phase (SLTP) flow conditions. By employing the Euler-Euler method, the characteristics of SLTP flow in the turbine with different solid particle diameters ...
Q. Li, F. Zhou, Q. Wang
doaj   +1 more source

Two-Objective Optimization of a Kaplan Turbine Draft Tube Using a Response Surface Methodology

Energies, 2020
The overall cost of a hydropower plant is mainly due to the expenses of civil works, mechanical equipment (turbine and control units) and electrical components.
Riccardo Orso, Ernesto Benini, Moreno Minozzo, Riccardo Bergamin, Andrea Magrini   +4 more
doaj   +1 more source

Numerical and experimental investigation of the effect of baffles on flow instabilities in a Francis turbine draft tube under partial load conditions

Advances in Mechanical Engineering, 2019
An improved method for preventing vortex rope formation and alleviating the associated pressure fluctuations in turbine draft tubes is investigated using baffles in the draft tube to hinder the swirling flow emerging from a Francis turbine runner.
Xing Zhou, He-gao Wu, Chang-zheng Shi
doaj   +1 more source

Solid Cycle Times of Chickpeas in Draft Tube Conical Spouted Beds

Chemical Engineering Transactions, 2015
The growing demand for alternative energy sources has furthered the interest on biomass over the last decades. Thus, a hydrodinamic study of conical spouted beds equipped with draft tube has been carried out for biomass, specifically, chickpeas.
I. Estiati, H. Altzibar, M. Tellabide Vecina, M. Olazar   +3 more
doaj   +1 more source

CFD Analysis of The Hydraulic Turbine Draft Tube to Improve System Efficiency

MATEC Web of Conferences, 2016
Demand of the power is increasing day by day with the development of the science and technology. Development of the renewable energy sector has become essential issue at the present situation due to the limited source of the non-renewable energy.
Chakrabarty Spandan, Sarkar Bikash Kr., Maity Subhendu   +2 more
doaj   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider, Kris‐Ann Schultz, Nora Schnitzler, Michael Abele, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Ines B. Brecht, Maja Cesen, Andrea Ferrari, Michaela Kuhlen, Malgorzata A. Krawczyk, Ricardo Lopez‐Almaraz, Yves Reguerre, Calogero Virgone, Daniel Orbach   +15 more
wiley   +1 more source

A Bibliometric Analysis of Publications in Uremic Toxins From 1991 to 2024

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Uremic toxins are a growing area of research in nephrology, with significant implications in the progression and treatment of chronic kidney disease (CKD) and the management of end‐stage kidney disease (ESKD). This bibliometric analysis aims to evaluate the global research trends, key contributors, and the impact of publications in ...
Yuh‐Shan Ho, Karim M. Soliman, Wisit Cheungpasitporn, Wannasit Wathanavasin, Ahmed Daoud, Ahmed I. Kamal, Balázs Szamosfalvi, Tibor Fülöp   +7 more
wiley   +1 more source

Organ‐specific redox imbalances in spinal muscular atrophy mice are partially rescued by SMN antisense oligonucleotides

FEBS Letters, EarlyView.
We identified a systemic, progressive loss of protein S‐glutathionylation—detected by nonreducing western blotting—alongside dysregulation of glutathione‐cycle enzymes in both neuronal and peripheral tissues of Taiwanese SMA mice. These alterations were partially rescued by SMN antisense oligonucleotide therapy, revealing persistent redox imbalance as ...
Sofia Vrettou, Brunhilde Wirth
wiley   +1 more source