Erosion damage of polymeric material by slurry |
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| Affiliation: | 1. Shanghai Merchant Ship Design and Research Institute, Shanghai, 201203, China;2. School of Marine Engineering and Technology, Sun Yat-Sen University, Zhuhai, China;3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), China;4. College of Shipbuilding Engineering, Harbin Engineering University, Harbin, 150001, China;1. Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT, 84112, USA;2. Fisher Company, North Salt Lake, UT, 84054, USA;1. College of Petroleum Engineering, China University of Petroleum, Beijing, 102249, China;2. State Key Laboratory of Petroleum Resources and Engineering, Beijing, 102249, China;3. Chinese Academy of Geological Sciences, Beijing, China;1. State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an, 710049, China;2. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China;3. Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China;4. Department of Environmental Science and Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, China;5. Qiyuan (Xi’an) Dae Young Environmental Protection Technology Co., Ltd., Xi’an, 710018, China |
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| Abstract: | An attempt was made to reveal the erosion mechanism of a plastic material in slurry containing glass beads of approximately 176 μm in diameter. The experimental observations were interpreted in terms of parameters such as the impact velocity Vp, the impact angle α of the beads and the striking efficiency η. A theoretical flow analysis for a solid-liquid two-phase flow was made and it was found that the trajectories of the particles curved as they approached the specimen, indicating that the actual surface onto which the particles were impinging was much narrower than that which would be expected for sand erosion in an air stream. In the slurry erosion the impact velocity and impact angle differed greatly at different positions of the specimen. This is possibly due to the differences in the density and viscosity of liquid and air. Two distinctly different types of erosion were observed: a typical brittle behaviour occurred near a stagnant point, after an initial incubation period, whereas at a distance from the stagnant point only a slight surface roughness was produced. These two different types of erosion produced a clear boundary. Erosion rates depended on the positions of the specimen and were found to be proportional to (Vp sin α)2.6. This suggested that the normal component of the impact velocity of the particle determined the erosion rate of the plastic material due to slurry. |
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