Effect of concentration and size of sediments on hydro-abrasive erosion of Pelton turbine

Kumar, Anant; Kumar, Arun; Staubli, Thomas

doi:10.1016/j.renene.2019.06.012

Cited by 58 publications

(44 citation statements)

References 13 publications

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“…SE induces the unceasing and regular mass dropping of targeted material. 11,36,60 It reduces the life spread and effectiveness of the hydro-turbine units along with altering their surface texture and roughness. 9 Similar phenomenon happens in slurry pumps also.…”

Section: Introductionmentioning

confidence: 99%

Insights to improve the tribo-performance of materials used under slurry erosion applications: A review

Yadav

Singh²

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Slurry erosion usually results in the form of damage to the materials of different components having underwater working domain. Numerous industries have suffered due to this kind of wear resulting in frequent breakdowns demanding repeated financial assistance and poor productivity. Properties and tribo-performance of materials related to distinct slurry applications play a significant role in arresting the slurry erosion wear. Slurry erosion depends on different parameters such as impact velocity, impingement angle, shape and size of erodent, slurry concentration and so on. These parameters differ from one application to another and accordingly, specific materials are selected knowing the extent and severity of slurry erosion wear. In the last decade, many authors studied parametrically the tribo-slurry erosion performance of materials, few of them correlated their investigations to the actual in situ conditions of applications. Various authors have analyzed the effect of operating parameters on the mechanism of erosion and conducted the comparative studies of different materials. Many of the investigators attempted to improve the properties and tribo-slurry erosion performance of materials through surface modification techniques; coating, reinforcement, heat treatment, thermo-mechanical process etc. This review is an effort to covers all such kind of explorations.

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Section: Introductionmentioning

confidence: 99%

Insights to improve the tribo-performance of materials used under slurry erosion applications: A review

Yadav

Singh²

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Moreover, the study reported a 60% increase in efficiency using a 8.87 mm nozzle diameter compared to a nozzle diameter of 5.19 mm. Rai et al [16] performed an experimental examination to evaluate bucket erosion behavior due to suspended sediments. A 1:8 scaled-down Pelton turbine prototype was used.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Analysis of Fluid Flow and Torque for Hydropower Pelton Turbine Performance Using Computational Fluid Dynamics

et al. 2022

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The difficulty of delivering electrical power to rural areas motivated the researchers to explore more accessible power sources. Hydropower is considered a desirable option due to its sustainability and lower costs. Pelton turbines have been widely used in hydropower plants because of their low installation and maintenance costs. This study provides a computational fluid dynamics (CFD) model for Pelton turbine performance under various flow conditions. The model is based on the conservation of mass principle, Newton’s second law, and the first law of thermodynamics. It is used to predict the torque produced by a turbine at different rotational speeds. Previously published experimental results for the same turbine geometry and flow parameters were used to validate the model’s predictions. Validation revealed that the model can reproduce the experimental results. This provides the required robustness for its use as a tool for turbine design and modification.

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“…In hydraulic machinery, slurry erosion is one of the main reasons for material damage and equipment failure. In the area with high sediment content, slurry erosion of water conservancy and hydropower facilities is very severe under the action of liquid-solid two-phase flow [1][2][3]. At present, components used in hydraulic machinery such as water turbines and valves are mostly made of stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Superior Slurry Erosion Behavior of a Casting NiCoCrFeNb0.45 Eutectic High Entropy Alloy

Jiang

Wang

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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The flow passage components in hydraulic machinery will be eroded rapidly when running in sand water. The wear resistance of materials commonly used in hydraulic machinery needs to be improved to prevent the failure of hydraulic machinery. New wear-resistant materials are urgently needed to improve the service life of hydraulic machinery. Eutectic high entropy alloy (EHEA) is a new kind of alloys with in situ lamellar structure. NiCoCrFeNb 0.45 EHEA has combined excellent strength and toughness. In this study, slurry erosion tests of NiCoCrFeNb 0.45 EHEA were carried out with different impact angles and impact velocities using a rotary jet erosion test apparatus. The NiCoCrFeNb 0.45 EHEA exhibited significant slurry erosion resistance compared with medium carbon steel 1045 and stainless steel 04Cr13Ni5Mo. The erosion rate of EHEA is much slower. Compared with medium carbon steel and stainless steel, the erosion of EHEA is completed via the accumulation and removal of platelets after plowing and work hardening, accompanied by partial micro-cutting.

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Effect of concentration and size of sediments on hydro-abrasive erosion of Pelton turbine

Cited by 58 publications

References 13 publications

Insights to improve the tribo-performance of materials used under slurry erosion applications: A review

Insights to improve the tribo-performance of materials used under slurry erosion applications: A review

A Numerical Analysis of Fluid Flow and Torque for Hydropower Pelton Turbine Performance Using Computational Fluid Dynamics

Superior Slurry Erosion Behavior of a Casting NiCoCrFeNb0.45 Eutectic High Entropy Alloy

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