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| Numerical Predictions of Solid Particle Erosion of Vertical Pipe Bend under Dispersed Bubble Flow |
| Received:February 13, 2020 Revised:March 27, 2020 |
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| DOI：10.7643/issn.1672-9242.2020.06.003 |
| KeyWord:pipe bend solid particle dispersed bubble flow erosion VOF model |
| Author | Institution |
| PENG Wen-shan |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| MA Li |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| HOU Jian |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Qingdao , China |
| CAO Xue-wen |
College of Pipeline and Civil Engineering, China University of Petroleum East China, Qingdao , China |
| HAN Ming-yi |
China Petroleum LONGWAY Engineering Project Management Co., Ltd, Langfang , China |
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| Abstract: |
| The work aims to investigate the erosion regularities of solid particles in the pipe bend under dispersed bubble flow and study the relationship among the gas-liquid distribution, solid particles trajectories and 3D erosion morphology. A transient state erosion simulation method based on VOF model and DPM model was proposed to calculate the erosion rate of pipe wall by the erosion model proposed by Oka et al. and the particle-wall rebound model proposed by Grant and Tabakoff. The results calculated by the CFD erosion model based on the VOF model and DPM model models were closer to the experimental value than those by the empirical model and the simplified CFD model. In dispersed bubble flow, solid particles were mostly dispersed in liquid phase. The liquid holdup in different cross sections had a close correlation with mass concentration of particles. The mass concentration of particles in the downstream straight pipe and in the elbow was higher than that in the upstream straight pipe. The area of the severe erosion region around the pipe bend containing solid particles was relatively large. The serious erosion location occurred at the outlet of the elbow.The erosion morphology of the vertical pipe bend under dispersed bubble flow is directly related to the gas-liquid-solid distribution inside the pipe. Multiphase flow erosion transient simulation can accurately calculate the gas-liquid-solid distribution and predict pipe erosion. |
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