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论文标题 |
方形弯管内部流动与阻力系数的数值计算 |
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发表期次 |
2008年第5期 |
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作 者 名 |
杨 任 |
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摘 要 |
杨 任
(郑州机电研究所,河南郑州 450015)
摘要:弯管是化工流程系统中的重要管件,其水力损失对整个管道设计有重要影响。用FLUENT软件对弯管不同截
面上速度的计算值与实验值进行对比,对弯管内部主流速度分布进行对比对不同雷诺数条件阻力系数进行计算,结果表
明数值计算结果与实验值有一定的一致性。弯头进口管道的长度对流动形态有重要影响,沿程阻力系数和局部阻力系数
都与雷诺数有关,并随着雷诺数的减小而增加。
关键词:弯管;内部流动;二次流;阻力系数;数值计算
中图分类号: TE832 文献标识码:A 文章编号: 1004 - 9614 (2008) 05 - 0030 - 04
Numer ica l Computa tions of the Flow and Hydraulic Loss
Coeff ic ient in a 90°Bend with a Square2cross2section
YANG Ren
( Zhengzhou In strumen t of Electro2mechan ica l Eng ineer ing, Zhengzhou 450015, Ch ina)
Abstract: The bend is important p ipe fitting in the chemical industry system, the hydraulic loss of which has an important
effect on the design of the overall p ipeline. By contrasting the calculated values of speed with the experimental value in different
cross sections of the bend, the speed distribution inside of the bend and the calculation of coefficientswith different Reynolds num2
bers by FLUENT software, the result is obtained that numerical simulations and experimental values have a certain compatibility.
The length of inlet p ipeline of the bend has an important impact on the form of flow. The coefficients of frictional resistance and of
local resistance are connected with Reynolds number and increase with the decrease of the Reynolds unmber.
Key words: bend; internal flows; secondary flow; resistance coefficient; numerical simulation | | |
