Results 1 to 10 of about 135 (99)

Parametric Investigation of Pelton Turbine Injector under Hydro-abrasive Erosion Conditions [PDF]

Journal of Applied Fluid Mechanics, 2023
In high-head Pelton turbines, the injector faces severe erosion due to suspended sediment leading to a reduction in turbine efficiency and higher maintenance costs.
N. Shrivastava, A. K. Rai
doaj   +1 more source

Modeling and Simulation of the Erosion Rate in Hydraulic Structures

Wasit Journal of Engineering Sciences, 2022
Basically, the durability of hydraulic structures is heavily influenced by concrete surface resistance against mechanical wear. Hydro-abrasion is the term used to describe deterioration of concrete surface inflicted by the continuous removal of surface ...
Shams Cheyad, Ali N. Hilo , Thaar S. Al-Ghasham , Ali Hameed Abd , Rawaa H. Ismaeil   +4 more
doaj   +1 more source

Influences of sand concentration and flow velocity on hydro-abrasive erosion behaviors of HVOF sprayed Cr3C2–NiCr and WC–Cr3C2–Ni coatings

Journal of Materials Research and Technology, 2022
Improving the hydro-abrasive erosion (HAE) resistance of the existing flow-handling components has been a matter of continuous effort for the hydraulic machineries.
Sheng Hong, Jiyue Qin, Jinran Lin, Yuping Wu, Jiahui Li, Yuan Zheng   +5 more
doaj   +1 more source

Effects of Flow Velocity and Sand Concentration on Hydro-Abrasive Erosion Behavior of HVOF-Sprayed WC-Cr₃C₂-Ni Coating in 3.5 wt.% NaCl Aqueous Solution

Metals, 2022
To explore the hydro-abrasive erosion (HAE) behaviors of a high-velocity oxygen fuel (HVOF)-sprayed WC-Cr3C2-Ni coating in 3.5 wt.% NaCl aqueous solution, various flow velocities (FVs) and sand concentrations (SCs) were designed using a rotating disk rig
Jinran Lin, Sheng Hong, Yuan Zheng, Wei Sun, Zhengwei Zhang, Min Kang, Xiuqing Fu   +6 more
doaj   +1 more source

Microstructure, hardness and slurry erosion-wear behaviors of high-speed laser cladding Stellite 6 coatings prepared by the inside-beam powder feeding method

Journal of Materials Research and Technology, 2022
Stellite 6 alloy has been considered a promising coating for hydro-turbine parts owing to excellent erosion resistance. In the present work, Stellite 6 coatings have been prepared by the high-speed laser cladding technique with the inside-beam powder ...
Ziyi Yang, Yongxin Jian, Zihan Chen, Hongjun Qi, Zhifu Huang, Guosheng Huang, Jiandong Xing   +6 more
doaj   +1 more source

Bedload transport and hydro-abrasive erosion at steep bedrock rivers and hydraulic structures

E3S Web of Conferences, 2018
Sediment transport in glacier basins and rivers, and hence reservoir sedimentation tend to increase under the impact of climate change. The raise of bedload transport rates results in an increase of hydro-abrasive erosion leading to bedrock incision in ...
Mueller-Hagmann Michelle, Auel Christian, Albayrak Ismail, Boes Robert M.   +3 more
doaj   +1 more source

Review of Erosion Causes and Important Factors on the Abrasion Resistance of Concrete

Wasit Journal of Engineering Sciences
The long-term impact of waterborne solids may lead to the destruction of significant amounts of concrete in hydraulic structures, including spillways, dams, and culverts.
Zainab Aziz, Ali N. Hilo, Thaar S. Al-Gasham   +2 more
doaj   +1 more source

On the influence of geometrical parameters and erosive wear on the dynamic behaviour of Pelton turbine runners

Results in Engineering
Hydro-abrasive erosion and material fatigue are amongst the main challenges for Pelton turbines. Erosive wear caused by sediment-laden water, significantly impacts turbine efficiency, time between overhaul and service life.
Maxime Chiarelli, David F. Vetsch, Robert M. Boes, Loïc Andolfatto, Cécile Münch-Alligné   +4 more
doaj   +1 more source

What Was ‘Middle Australia’? Social Categorisation and Political Positioning in the Late‐20th Century

Australian Journal of Politics &History, EarlyView.
ABSTRACT ‘Middle Australia’ became a ubiquitous term of social categorisation and political positioning during the latter decades of the 20th century. This article examines how this concept was variously used in the metropolitan print media in the guises of the Sydney Morning Herald and The Age of Melbourne, including in their reporting of federal and ...
Chris Beer
wiley   +1 more source

Submerged geomorphic record of Quaternary palaeoshorelines: terraces and clinothems along a shelf‐edge in the Žirje Archipelago, Adriatic Sea

Boreas, EarlyView.
Numerous studies have shown that during the Quaternary there were substantial fluctuations in sea level in response to glacial–interglacial climate variability, reaching lowstand positions up to 134 m below the present sea level (b.s.l.). These fluctuations have had a strong influence on the morphology of shallow shelf seas, which preserve evidence of ...
Ozren Hasan, Dea Brunović, Natalia Smrkulj, Maria Geraga, Dimitris Christodoulou, Nikolina Ilijanić, George Papatheodorou, Slobodan Miko   +7 more
wiley   +1 more source