Effect of impact angle on liquid droplet impingement erosion

Hattori, Shuji; Kakuichi, Masaya

doi:10.1016/j.wear.2012.12.025

Cited by 38 publications

(11 citation statements)

References 10 publications

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“…Water droplet impingement at a shallow angle is thought to decrease the erosion rate (damage-depth rate) as a sinusoidal function of the impingement angle 10,12) . The vertical velocity element of impingement droplets causes a shock wave that is transmitted vertically from the surface into the bulk.…”

Section: Effect Of the Impingement Angle On Erosionmentioning

confidence: 99%

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Water Droplet Erosion Resistance of Aluminizing Diffusion Coatings on Steel Tubes

2018

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Problems with erosion caused by water droplet impingement occur in high-temperature and high-pressure pipelines and in steam turbines in energy conservation systems and power plants. Advances in material development and the use of highly resistant materials are needed in order to insure a high-performance level of plant maintenance. The use of ceramic coatings or intermetallic diffusion coatings on pipe steels is thought to be bene cial for the improvement of corrosion and erosion resistance. Aluminizing diffusion coatings on a few types of steel tubes with different coating thicknesses were prepared for this experiment. Erosion tests on water droplet impingement were conducted on the internal surface of tubes at a droplet velocity of 148 m s −1 using a water droplet testing apparatus. Erosion resistance was evaluated based on the incubation period and an average damage-depth rate for aluminizing diffusion coatings and steel substrates. Hardness distributions of the coating materials on cross-sectional surfaces revealed a harder layer on the surface, a functional gradient hard layer, and a soft steel substrate. EDX analyses on aluminizing diffusion coatings showed irregularly large grains of alumina, a microstructural intermetallic compound of Al-Fe-C with small grains of alumina, and an Al-Fe-C gradient diffusion layer toward the substrate. Good erosion resistance was obtained with a microstructural intermetallic compound layer with small grains of alumina. However, the erosion resistance of the diffusion layer with large grains of alumina was inferior. The erosion resistance depended on the combinations of the diffusion layer, alumina grains, and steel substrate, but not necessarily on the thickness of the diffusion layers. [

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Section: Effect Of the Impingement Angle On Erosionmentioning

confidence: 99%

“…A few researchers have investigated the solid-particle-impact characteristics of Fe-Al intermetallic coatings 8,9) , but not the effects of water droplet impingement. The effect of the impingement angle of droplets on erosion damage 10) , which practically occurs in pipes and elbows, is also required to investigate.…”

Section: Introductionmentioning

confidence: 99%

Water Droplet Erosion Resistance of Aluminizing Diffusion Coatings on Steel Tubes

2018

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“…This, therefore, inhibits an accurate calculation of the Reynolds, Weber and Ohnesorge numbers (equations often used in liquid droplet impact analysis [158][159][160]). Whether the impact occurs at normal or oblique angles will also influence the spreading mechanism [161,162].…”

Section: Insect Impact Dynamicsmentioning

confidence: 99%

Critical considerations in the mitigation of insect residue contamination on aircraft surfaces – A review

Kok

Smith

Wohl

et al. 2015

Progress in Aerospace Sciences

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“…The two main methods to measure the advancing and receding contact angles mentioned above are usually performed in a gentle way. However, in many practical applications, the droplet always experiences a fierce movement such as high speed spraying and impacting or sliding on textured surface rapidly [21][22][23]. In these processes, droplet dynamics may present some different properties which is worthy of being studied.…”

Section: Introductionmentioning

confidence: 99%

Droplets impact on textured surfaces: Mesoscopic simulation of spreading dynamics

Wang

Chen

2015

Applied Surface Science

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Effect of impact angle on liquid droplet impingement erosion

Cited by 38 publications

References 10 publications

Water Droplet Erosion Resistance of Aluminizing Diffusion Coatings on Steel Tubes

Water Droplet Erosion Resistance of Aluminizing Diffusion Coatings on Steel Tubes

Critical considerations in the mitigation of insect residue contamination on aircraft surfaces – A review

Droplets impact on textured surfaces: Mesoscopic simulation of spreading dynamics

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