| WANG Zhi-guo,QU Hang,DOU Yi-hua,WANG Wen-juan,CAO Kai.Comparison of Abrasive Jet Erosion Behavior in Water and Non-Newtonian Hydroxypropylguar Gum Solution[J],50(5):160-167 |
| Comparison of Abrasive Jet Erosion Behavior in Water and Non-Newtonian Hydroxypropylguar Gum Solution |
| Received:March 16, 2020 Revised:June 15, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.05.017 |
| KeyWord:non-newtonian hydroxypropylguar gum fluid abrasive jet CFD jet erosion test erosion model |
| Author | Institution |
| WANG Zhi-guo |
School of Mechanical Engineering, Xi'an Shiyou University, Xi'an , China |
| QU Hang |
School of Mechanical Engineering, Xi'an Shiyou University, Xi'an , China |
| DOU Yi-hua |
School of Mechanical Engineering, Xi'an Shiyou University, Xi'an , China |
| WANG Wen-juan |
School of Mechanical Engineering, Xi'an Shiyou University, Xi'an , China |
| CAO Kai |
School of Mechanical Engineering, Xi'an Shiyou University, Xi'an , China |
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| Abstract: |
| This paper aims to analyze the difference between the particle motion in water and the non-Newtonian hydroxypropylguar gum solution in abrasive jet, reveals the near-wall erosion behavior of abrasive jet particles in non- Newtonian fluid, and provides the basis for the establishment of erosion model in non-Newtonian fluid. The computational fluid dynamics (CFD) method was utilized to study the flow field characteristics of water and hydroxypropylguar gum solution in the process of abrasive jet, and the differences in particle motion characteristics caused by this were analyzed, including the impact number, impact velocity and impact angle of particles on the wall. Combined with jet erosion tests, the experimental data was compared with the prediction results of different erosion models to select the most suitable prediction model. The results show that the turbulent kinetic energy of hydroxypropylguar gum solution near the wall (150 μm off from the wall) was higher than that of water, and the flow velocity near the wall was lower than that of water. In the high shear rate region near the wall, the viscosity of hydroxypropylguar gum solution dropped to 3.54 mPa.s due to shear dilution, while the maximum viscosity reached to 25.4 mPa.s in the region far away from the jet impact center. Compared with water, in the central area of the jet impact, the number of particles in the hydroxypropylguar gum solution hitting the wall of the material was less, and the impact velocity and angle were smaller. The erosion prediction results of DNV, Oka and E/CRC Zhang models were compared with the results of erosion tests of particles in hydroxypropylguar gum solution. DNV model did not predict the erosion sufficiently, while both the Oka and E/CRC Zhang model over-predicted the erosion. The prediction result of the Zhang model is closest to the experimental data. The shear thinning non-Newtonian rheology of fluid could affect the particle movement in the jet process, resulting in different material surface erosion morphologies. By comparing the predicted values of different erosion models, it is shown that within the range of the experimental conditions and the selected erosion model in this study, E/CRC Zhang model is the preferred erosion prediction model for studying the erosion of solid particles in non-Newtonian Hydroxypropylguar gum solution. |
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