Abstract
In this study, we investigated the characteristics of abrasive erosion considering the material properties of abrasives and targets. An abrasive particle erosion model considering energy transfer due to hardness differences was developed based on energy conservation using the correlation between volume removal and effective kinetic energy. To obtain the effective erosion kinetic energy of an abrasive, an acceleration model was derived for the abrasive particles, including terms describing the properties of the abrasive and fluid. The applicability of the suggested model was verified by comparing the brittle erosion results obtained using a previous theoretical approach to those of the present numerical analysis. The results obtained using the developed model exhibited good qualitative agreement with the brittle material erosion results. By evaluating acceleration and the erosion characteristics of an abrasive, the erosion performance could be predicted and optimized.
Highlights
Waterjet technology has considerably advanced due to the production of optimally shaped nozzles, mixing tubes, and commercial-level orifices [1]
The total kinetic energy of an abrasive waterjets (AWJs) is determined by the total input mass of the abrasive, but experimental results have shown that the erosion performance of the abrasive depends on its properties, even under the same conditions
As the acceleration of abrasives in waterjets is affected by properties such as density and diameter, the exit velocity of the abrasives at the exit of the focus was derived from fluid mechanics
Summary
Waterjet technology has considerably advanced due to the production of optimally shaped nozzles, mixing tubes, and commercial-level orifices [1]. Abrasive waterjets (AWJs), in which abrasives are injected into a plain waterjet, are being developed for better performance [2,3]. The total kinetic energy of an AWJ is determined by the total input mass of the abrasive, but experimental results have shown that the erosion performance of the abrasive depends on its properties (i.e., density and diameter), even under the same conditions (i.e., pump pressure, flow rate, and traverse speed [17,18]). It is necessary to understand the effect of abrasive properties on erosion mechanism and performance. Sci. 2019, 9, 4234; doi:10.3390/app9204234 www.mdpi.com/journal/applsci the erosion probability (k ), abrasive flow rate (m ), and reaction order (m)
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