Results 1 to 10 of about 3,469 (167)

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   +2 more sources

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

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   +4 more sources

Application of hydro-abrasive erosion model from IEC 62364:2019 standard in Francis turbines [PDF]

IOP Conference Series: Earth and Environmental Science, 2022
Abstract Hydro-abrasive erosion in hydraulic turbines is critical and one of the prominent issue due to its association with maintenance costs and production losses in the hydropower plant. IEC 62364:2019* standard guide focuses mainly on hydroelectric powerplant equipment and provides the standard on particle abrasion rates on several ...
N Acharya, S Gautam, S Chitrakar, C Trivedi, O G Dahlhaug   +4 more
openaire   +4 more sources

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

Hydro-abrasive erosion in Pelton turbine injectors: A numerical study [PDF]

Renewable Energy, 2019
Abstract Numerical simulations were performed to investigate how the design and the operation conditions of a Pelton turbine injector affect its vulnerability to hydro-abrasive erosion, alongside with its flow control capacity. Use was made of a Volume Of Fluid (VOF) model for simulating the free nozzle jet, a Lagrangian particle tracking model for ...
Messa, Gianandrea Vittorio, Mandelli, Simone, Malavasi, Stefano   +2 more
openaire   +2 more sources

Testing of Concrete Abrasion Resistance in Hydraulic Structures on the Lower Sava River [PDF]

, 2012
The paper deals with the issues of resistance of concrete linings to long-term abrasion loading caused by waterborne particles, particularly for the proposed hydro power plants on the Sava River in Slovenia.
Kralj, Miha, Kryžanowski, Andrej, Mikoš, Matjaž, Planinc, Igor, Ukrainczyk, Velimir, Šušteršič, Jakob   +5 more
core   +2 more sources

Surface modification of HVOF thermal sprayed WC–CoCr coatings by laser treatment [PDF]

, 2010
In this work the affects of laser characteristics on microstructure and microhardness of high velocity oxygen fuel sprayed (HVOF) WC–CoCr coatings were investigated.
A. Forn, AK Maiti, B Wielage, BE Bodger, BS Mann, D. Brabazon, E Cappelli, E. Chikarakara, G Barbezat, IM Hutchings, J Mateos, J. A. Picas, JKN Murthy, M. Punset, P Serra, RJK Wood, S. Aqida, S. Naher, SH Zhang, TY Cho   +19 more
core   +1 more source