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### 通风管路90o弯管壁面颗粒磨损的数值模拟

1. 安徽工业大学建筑工程学院 安徽工业大学建筑工程学院 安徽欣创节能环保科技股份有限公司 安徽欣创节能环保科技股份有限公司 安徽欣创节能环保科技股份有限公司 安徽工业大学建筑工程学院 安徽工业大学建筑工程学院
• 收稿日期:2015-10-09 修回日期:2015-11-27 出版日期:2016-06-20 发布日期:2017-04-28
• 通讯作者: 钱付平

### Numerical Simulation on Erosion of Wall by Particles in a 90o Bending Duct of Ventilation Pipeline

ZHANG Li-an QIAN Fu-ping HU Jia XIA Yong-jun YANG Hong LU Jin-li HAN Yun-long

1. School of Civil Engineering and Architecture, Anhui University of Technology School of Civil Engineering and Architecture, Anhui University of Technology Anhui Xinchuang Energy Saving & Environment Protection Science &Technology Co., Ltd. Anhui Xinchuang Energy Saving & Environment Protection Science &Technology Co., Ltd. Anhui Xinchuang Energy Saving & Environment Protection Science &Technology Co., Ltd. School of Civil Engineering and Architecture, Anhui University of Technology School of Civil Engineering and Architecture, Anhui University of Technology
• Received:2015-10-09 Revised:2015-11-27 Online:2016-06-20 Published:2017-04-28
• Contact: QIAN Fu-ping

Abstract: The gas-solid two-phase flow in 90o bending duct of the ventilation and dust removal pipeline was simulated using CFD-DPM, and the erosion rate of the bending duct by anthracite coal particle was calculated, and the influence of the bend diameter R/D ratio of the bending duct, inlet gas velocity, particle size and the materials properties of the duct wall on the erosion was also analyzed. And, the results of numerical simulation were compared with those of experiment and by empirical formula in the literature. The results show that the numerical simulation results match the experimental data and empirical formula calculation values, which indicates that the numerical simulation results are probably credible. When the inlet gas velocity and the particle size are fixed, the erosion rate of the bending duct decreases first and then increases with increasing R/D. When R/D is 3~4, the erosion rate is relatively small, the relational expression between the erosion rate and the inlet gas velocity is E=KV1.08~1.32 when the bend diameter ratio is constant, and the inlet gas velocity is 0~5 m/s, the change of the erosion rate with the inlet gas velocity is small, but when the inlet gas velocity is greater than 5 m/s, the trend is opposite. The relational expression between the erosion rate and the particle size is E=Kdp2.38~3.01. The smaller the bend diameter ratio, the more obvious the erosion rate changes with the dust particle size. And when the dust particle size is smaller than 5 mm, the erosion rate is almost zero. In addition, the materials properties of the duct wall (such as brinell hardness) also influence the erosion rate, and the erosion rate of the material with the great brinell hardness is lower than that of the material with the small brinell hardness.