Attenuation of wall-thinning rate in deep erosion by liquid droplet impingement

Fujisawa, Nobuyuki; Yamagata, Takayuki; Wada, Katsuhiko T.

doi:10.1016/j.anucene.2015.10.024

Cited by 14 publications

(12 citation statements)

References 16 publications

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“…The erosion rate can be evaluated from equation 1by using the experimental data of the droplet velocity V, the droplet diameter (d) and the number of impinging droplets [32]. The droplet velocity can be measured by particle image velocimetry, its diameter by shadowgraph technique and the number of impinging droplets in a unit area can be counted by a sampling probe [32,33,34].…”

Section: Liquid Erosion Parametersmentioning

confidence: 99%

“…The water jet was moved across the sample surface at two different feed speeds: 0.017 and 0.25m/s resulting in exposure times of 4.8 and 0.32s per water jet crossing. Fujisawa et al [33] designed an experimental apparatus for water droplet impingent testing ( Figure 14). They setup two different units for their experiments, one unit with a 0.8mm diameter nozzle, SOD of 270mm with the nozzle pressure of 16MPa and the other unit with the same nozzle but SOD of 480mm and nozzle pressure of 28MPa, for both units the impact angle was 90 [33].…”

Section: Stationary Sample Erosion Test (Sset)mentioning

confidence: 99%

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Rain erosion-resistant coatings for wind turbine blades: A review

Dashtkar

Hadavinia

Şahinkaya

et al. 2019

Polymers and Polymer Composites

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Wind blades are the most expensive parts of wind turbines made from fibre-reinforced polymer composites. The blades play a critical role on the energy production, but they are prone to damage like any other composite components. Leading edge (LE) erosion of the wind turbine blades is one of the common damages, causing a reduction in the annual energy production especially in offshore wind turbine farms. This erosion can be caused by rain, sand and flying solid particles. Coating the blade against erosion using appropriate materials can drastically reduce these losses and hence is of great interest. The sol–gel technique is a convenient method to manufacture thin film coatings, which can protect the blades against the rain erosion, while having negligible effect on the weight of the blades. This article provides an extensive review of the liquid erosion mechanism, water erosion testing procedures and the contributing factors to the erosion of the LE of wind turbine blades. Techniques for improving the erosion resistance of the LE using carbon nanotubes and graphene nano-additives are also discussed.

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Section: Liquid Erosion Parametersmentioning

confidence: 99%

Section: Stationary Sample Erosion Test (Sset)mentioning

confidence: 99%

Rain erosion-resistant coatings for wind turbine blades: A review

Dashtkar

Hadavinia

Şahinkaya

et al. 2019

Polymers and Polymer Composites

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“…WDE is also observed in carbon steel pipelines used in nuclear/fossil power plants and is known to cause the so-called wall-thinning [29][30][31]. This usually happens when accelerated flow of steam passes through orifices, impinging bent parts of the pipe, as illustrated in Figure 1d.…”

Section: Water Droplet Erosion: Background and Industrial Applicationsmentioning

confidence: 99%

“…This usually happens when accelerated flow of steam passes through orifices, impinging bent parts of the pipe, as illustrated in Figure 1d. This eventually leads to the leak of the steam flow to the surrounding environment, as it was the case of the Onagawa power plant in 2007 [31]. [32], (b) compressor of gas turbine (courtesy of MDS Coatings Technologies Corp.), (c) parts of airplane, redrawn from [25], and (d) pipes of nuclear power plants [29].…”

Section: Water Droplet Erosion: Background and Industrial Applicationsmentioning

confidence: 99%

Water Droplet Erosion of Wind Turbine Blades: Mechanics, Testing, Modeling and Future Perspectives

Ibrahim

Medraj

2019

Materials

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The problem of erosion due to water droplet impact has been a major concern for several industries for a very long time and it keeps reinventing itself wherever a component rotates or moves at high speed in a hydrometer environment. Recently, and as larger wind turbine blades are used, erosion of the leading edge due to rain droplets impact has become a serious issue. Leading-edge erosion causes a significant loss in aerodynamics efficiency of turbine blades leading to a considerable reduction in annual energy production. This paper reviews the topic of water droplet impact erosion as it emerges in wind turbine blades. A brief background on water droplet erosion and its industrial applications is first presented. Leading-edge erosion of wind turbine is briefly described in terms of materials involved and erosion conditions encountered in the blade. Emphases are then placed on the status quo of understanding the mechanics of water droplet erosion, experimental testing, and erosion prediction models. The main conclusions of this review are as follow. So far, experimental testing efforts have led to establishing a useful but incomplete understanding of the water droplet erosion phenomenon, the effect of different erosion parameters, and a general ranking of materials based on their ability to resist erosion. Techniques for experimentally measuring an objective erosion resistance (or erosion strength) of materials have, however, not yet been developed. In terms of modelling, speculations about the physical processes underlying water droplet erosion and consequently treating the problem from first principles have never reached a state of maturity. Efforts have, therefore, focused on formulating erosion prediction equations depending on a statistical analysis of large erosion tests data and often with a combination of presumed erosion mechanisms such as fatigue. Such prediction models have not reached the stage of generalization. Experimental testing and erosion prediction efforts need to be improved such that a coherent water droplet erosion theory can be established. The need for standardized testing and data representation practices as well as correlations between test data and real in-service erosion also remains urgent.

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“…The distances between the jet nozzle and the specimen were 27 cm and 48 cm. The erosion test was carried out with the following parameters, 16 -28 MPa pressure, and 179 -237 m/s nozzle exit velocities [107].…”

Section: Jet Impingement Tribometer (Jit)mentioning

confidence: 99%

A Review on Tribological Wear Test Rigs for Various Applications

bawab

Nirmal

Isa

et al. 2018

IJIE

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To mimic a tribosystem setup to the real time model while taking into consideration the subject of green tribology, many tribological wear test rigs are invented. The current work is a dedicated review on the latest development of various tribological wear test rigs build for numerous applications. With the aid of diagrams, the working principles of the machines which are built on specific standards are discussed. Their operating parameters associated with related research using these machines are also included. In addition, recommendations and directions for improvements in tribology machines are reported.

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Attenuation of wall-thinning rate in deep erosion by liquid droplet impingement

Cited by 14 publications

References 16 publications

Rain erosion-resistant coatings for wind turbine blades: A review

Rain erosion-resistant coatings for wind turbine blades: A review

Water Droplet Erosion of Wind Turbine Blades: Mechanics, Testing, Modeling and Future Perspectives

A Review on Tribological Wear Test Rigs for Various Applications

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