段塞流下携砂水平弯管的冲蚀试验
Erosion Experiment for Horizontal Elbow in Slug Flow Carrying Sands
摘 要
采用气液固多相流冲蚀试验环道开展了段塞流条件下携砂水平弯管冲蚀试验，研究了不同砂粒粒径对冲蚀规律的影响。结果表明：液塞流经弯管时会卷携底部的砂粒，在离心力及二次流的作用下，砂粒偏向弯管外侧，对外侧出口处造成严重冲击，冲蚀最严重部位出现在弯头出口外侧中下部；砂粒粒径和数量均会影响冲蚀速率，且粒径的影响更显著，随着粒径的增大，冲蚀速率呈现先减小后增大的趋势；砂粒冲击试样表面主要会造成微切削、犁割及冲击变形三种形式的破坏，最大冲蚀坑深随粒径的增大而增大。
水平弯管
冲蚀
砂粒粒径
表面形貌
slug flow
horizontal elbow
erosion
particle size
surface morphology
Abstract
Erosion experiment for horizontal elbow in slug flow carrying sands was carried out by using multiphase flow erosion test loop,the influence of sand particle size on erosion law was studied.The results showed that the liquid slug flowing through the elbow carried the particles from bottom,and the particles moved to the outer portion of the elbow under the action of centrifugal force and secondary flow,causing severe impact on the outer side of elbow outlet.The most serious erosion occurred at the middle and bottom of elbow outlet.Both particle size and particle quantity had effects on erosion rate,but the effect of particle size on erosion rate was more significant than that of particle quantity;the erosion rate decreased and then increases with the increase of particle size.Micro-cutting wear,plowing and deformation were three main forms of damage on the surface of sample due to impact of sands;the maximum depth of erosion pit increased with the increase of particle size.
中图分类号 TE832 DOI 10.11973/fsyfh-201904003
所属栏目 试验研究
基金项目 国家重点研发计划专项（2016YFC0802301）
收稿日期 2017/9/21
修改稿日期
网络出版日期
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引用该论文: CAO Xuewen,FAN Yin,LI Xingbiao,PENG Wenshan,SHI Qian. Erosion Experiment for Horizontal Elbow in Slug Flow Carrying Sands[J]. Corrosion & Protection, 2019, 40(4): 245
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参考文献
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【4】丁一刚,王慧龙,郭兴蓬,等. 金属在液固两相流中的冲刷腐蚀[J]. 材料保护,2001,34(11):16-18.
【5】谢文伟,邓建新,周后明,等. 材料冲蚀磨损的数值模拟研究现状及展望[J]. 腐蚀与防护,2012,33(7):601-604.
【6】董刚,张九渊. 固体粒子冲蚀磨损研究进展[J]. 材料科学与工程学报,2003,21(2):307-312.
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【11】STACK M M,CORLETT N,ZHOU S. Impact angle effects on the transition boundaries of the aqueous erosion-corrosion map[J]. Wear,1999,225/229:190-198.
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