气固两相流中一种抗磨新方法的数值验证

CIESC Journal

• RESEARCH PAPERS • 上一篇下一篇

气固两相流中一种抗磨新方法的数值验证

姚军; 樊建人; 岑可法

Institute of Thermal Power Engineering and CE&EE, Zhejiang University, Hangzhou
310027,China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-02-28 发布日期:2002-02-28
通讯作者: 姚军

Numerical Investigation of a New Method for Reducing Bends Erosion from Particles Impacts

YAO Jun; EAN Jianren; CEN Kefa

Institute of Thermal Power Engineering and CE&EE, Zhejiang University, Hangzhou
310027,China

Received:1900-01-01 Revised:1900-01-01 Online:2002-02-28 Published:2002-02-28
Contact: YAO Jun

摘要/Abstract

摘要： The present paper intends to introduce a new method for reducing bends erosion from
particles impacts:the ribbed bend erosion protection method. Ribs are evenly fixed in the
range of 20°-80° on the inner-wall of inside 90° bend and the bend (including ribs) is
made of medium carbon steel. Three-dimensional numerical work is performed and the result
shows satisfactory agreement with the experimental measurement. Numerical simulation
studies the characteristics of axial gas flow along the bend and secondary flow at cross
section. Detailed analyses involving the impact velocity and incidence angle of particle-
metal (either particle-rib or particle-duct) impact unveil the mechanism of the anti-
erosion effect. As a result, predications achieve that the average erosion rate of the
ribbed bends is only a third of the bare bend under test conditions and rectangle ribs
possess higher anti-erosion effect than square ribs, while the wear distribution pattern
remains unchanged after adding ribs onto the bend. All results confirm that the ribbed bend
erosion protection method is a simple and effective method for reducing bends erosion from
particles impacts.

关键词: bend erosion;particle impact;rib;numerical simulation

Abstract: The present paper intends to introduce a new method for reducing bends erosion from
particles impacts:the ribbed bend erosion protection method. Ribs are evenly fixed in the
range of 20°-80° on the inner-wall of inside 90° bend and the bend (including ribs) is
made of medium carbon steel. Three-dimensional numerical work is performed and the result
shows satisfactory agreement with the experimental measurement. Numerical simulation
studies the characteristics of axial gas flow along the bend and secondary flow at cross
section. Detailed analyses involving the impact velocity and incidence angle of particle-
metal (either particle-rib or particle-duct) impact unveil the mechanism of the anti-
erosion effect. As a result, predications achieve that the average erosion rate of the
ribbed bends is only a third of the bare bend under test conditions and rectangle ribs
possess higher anti-erosion effect than square ribs, while the wear distribution pattern
remains unchanged after adding ribs onto the bend. All results confirm that the ribbed bend
erosion protection method is a simple and effective method for reducing bends erosion from
particles impacts.

Key words: bend erosion, particle impact, rib, numerical simulation

姚军, 樊建人, 岑可法. 气固两相流中一种抗磨新方法的数值验证[J]. CIESC Journal.

YAO Jun, EAN Jianren, CEN Kefa. Numerical Investigation of a New Method for Reducing Bends Erosion from Particles Impacts[J]. .

参考文献

[1] Tilly, G. P., "Erosion caused by impact of solid particles",Treatise on Materials
Science and Technology, 13 (2), 287(1979).
[2] Fan, J. R., Zhou, D. D., Zeng, K. L., Cen, K. F., "Numerical and experimental study of
finned tube erosion protection methods", Wear, 152 (1), 1 (1992).
[3] Song, X. Q., Lin, J. Z., Zhao, J. F., Shen, T. Y., "Research on reducing erosion by
adding ribs on the wall in particulate two-phase flows", Wear, 193 (1), 1 (1996).
[4] Yao, J., Zhang, B. Z., Fan, J. R., "An experimental investigation of a new method for
protecting bends from erosion in gas-solid flows", Wear, 240 (2), 215 (2000).
[5] Yao, J., Zhang, B. Z., Shen, X. R., "Numerical investigation on flow characteristics in
ribbed bend", J. of Hydrodynamics, 12 (3), 47 (2000).
[6] Launder, B. E., Spalding, D. B., "The numerical computation of turbulent flows", Comp.
Meth. Appl. Mech. and Eng., 3 (3), 269 (1974).
[7] Crowe, C. T., Sharma, M. P., Stock, D. E., "The Particlesource-in-cell (PSI-cell) model
for gas-droplet flows", J. of Fluids Engng., 99 (2), 325 (1977).
[8] Zhang, X. Y., Chen, L. H., Fan, J. R., Cen, K. F., "Prediction of turbulient flow
characteristics in the curved duct with a baffle", J. ofHydrodynamics, 9 (4), 19 (1997).
[9] Patankar, S. V., Numerical Heat Transfer and Fluid Flow,McGraw-Hill, New York (1980).
[10] Sommerfeld, M., Zivkovic, G., "Recent advances in the numerical simulation of
pneumatic conveying through tube systems", In: Computational Methods in Applied
Sciences,Ch. Hirsch, ed., Elsevier Science Publishers B. V., 201(1992).
[11] Grant, G., Tabakoff, W., "Erosion prediction in turbomachinery resulting from environ
-mental solid particles", J. of Aircraft, 12 (5), 471 (1975).
[12] Tabakoff, W., Kotwal, R., Hamed, A., "Erosion study of different materials affected by
coal ash particles", Wear, 52(1), 161 (1979).
[13] Mason, J. S., Smith, B. V., "The erosion of bends by pneumatically conveyed suspension
of abrasive particles", Powder Technology, 6 (6), 323 (1972).
[14] Finnie, I., "Erosion of surfaces by solid particles", Wear, 3(1), 87 (1960).
[15] Tilly, G. P., "Erosion caused by ariborne particles", Wear,14 (1), 63 (1969).
[16] Cousen, A. K., Hutchings, I. M., "A critical study of the erosion of an aluminum alloy
by solid spherical particles at normal impingement", Proc. 6th Int. Conf. on Erosion by
Liquid and Solid Impact, 41 (1983).

气固两相流中一种抗磨新方法的数值验证

Numerical Investigation of a New Method for Reducing Bends Erosion from Particles Impacts

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价