煤液化弯管冲蚀磨损的数值模拟研究
Numerical Simulation Research of Erosion Wear for Elbows in Coal Liquefaction
摘 要
针对煤液化工业管道系统中弯管部位的冲蚀磨损问题，通过二次开发将磨损模型嵌入到FLUENT中模拟计算磨损率大小及磨损位置，将计算结果与试验数据相对比以验证模型的正确性，再将磨损模型应用到煤液化管道的冲蚀磨损预测研究中。结果表明: 煤粉直径小于80 μm时，磨损率随着粒径增大明显降低；最大磨损率与冲击速度成指数增长；最大磨损率随着管道弯曲角度增大而降低；弯径比为3时磨损率较小且磨损分布均匀。
弯管
固-液两相流
冲蚀磨损
数值模拟
coal-oil slurry
elbow
solid-liquid flow
erosion wear
numerical simulation
Abstract
The erosion model was inserted into FLUENT by secondary development to calculate the wear rate and simulate the wear position for the elbow erosion wear problem in coal liquefaction industry. The calculated results and test data were compared to validate the correctness of the model. Then the erosion model was applied to predict the erosion at the elbow region in coal liquefaction industry. The numerical results reveal that when the particle diameter was less than 80 μm, the maximum wear rate significantly decreased with the increase of particle diameter. Maximum wear rate grows exponential with the increase of impact velocity. The maximum wear rate decreased with the increase of pipe bending angle. Bend diameter ratio of 3 was more appropriate.
中图分类号 TG174 DOI 10.11973/fsyfh-201605016
所属栏目 应用技术
基金项目
收稿日期 2015/3/17
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备注王建文(1969-),副教授,博士,从事冲蚀-腐蚀失效研究
引用该论文: SHAO Dong,WANG Jian-wen. Numerical Simulation Research of Erosion Wear for Elbows in Coal Liquefaction[J]. Corrosion & Protection, 2016, 37(5): 424
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参考文献
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【3】郑友取，张新育. 90°方形弯管内颗粒冲蚀磨损研究[J]. 热力发电，2007,36(4): 34-36.
【4】黄卫星，陈文梅. 工程流体力学[M]. 北京: 化学工业出版社，2002.
【5】FILIPIAK M. Mesh Generation[M]. Edinburgh Parallel Computing Centre: University of Edinburgh,1996.
【6】NOGAMI Y,YAMAURA J,INOKUCHI K,et al. Viscoelasticity of coal slurries[C]//Proceedings of the 4th Japan China Symposium on Coal and C1 Chemistry.Osaka: [s.n,],1993: 395-398.
【7】程嘉瑞，杨向同. API油管接箍液固两相流体冲蚀数值模拟[J]. 腐蚀与防护，2013,34(12): 1067-1069.
【8】BADR H M,HABIB M A,BEN-MANSOUR R,et al. Numerical investigation of erosion threshold velocity in a pipe with sudden contraction[J]. Computers and Fluids,2005,34(6): 721-742.
【9】FINNE I,MCFADDEN D. On the velocity dependence of the erosion of ductile metals by solid particles at low angles of incidence[J]. Wear,1978,48(1): 181-190.
【10】HASHISH M. An improved model of erosion by solid particles[C]//Proceeding of the 7th International Conference on Erosion by liquid and Solid Impact.Cambridge: Cavnedish Laboratory,1988: 66.
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【12】OKA Y I,OKAMURA K,YOSHIDA T. Particle estimation of erosion damage caused by solid particle impact.Part1,Part2: effects of impact parameters on a predictive equationp[J]. Wear,2005,259(1/6): 95-101.
【13】WANG J R,SIAMACK A. A CFD based correlation for erosion factor for long-radius elbows an-d bends[J]. Journal of Energy Resources Technology,2003,125(1): 26-34.
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