UNSTEADY INTERMITTENT FLOW IN A ROTATING CURVED PIPE

被引：0

作者：

Yin Jian-an ^{[1
]}

Shen Xin-rong ^{[1
]}

Chen Hua-jun ^{[1
]}

Zhang Ben-zhao ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mech, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF HYDRODYNAMICS | 2004年 / 16卷 / 02期

基金：

中国国家自然科学基金;

关键词：

unsteady flow; secondary flow; rotating pipes;

D O I：

暂无

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The effects of rotation and intermittent frequency on the flow transition of secondary flow and, main flow were examined in detail. Certain hitherto unknown flow patterns were found. A numerical study was performed to study the characteristics of unsteady intermittent flow in a rotating curved pipe. Due to the rotation, both the Coriolis force and the centrifugal force could contribute to the unsteady intermittent flow and some complicated phenomena can be found. The results indicate that the unsteady intermittent flow are mainly characterized by five parameters: the Dean number Dn, the curvature kappa, the maximal force ratio F (of the Coriolis force to the centrifugal force in a cycle), the intermittent frequency parameter eta(the ratio of a pulslating time to the cycle period), and the Womersley number alpha. Present works shows the natures of the unsteady intermittent flow in a rotating curved pipe.

引用

页码：158 / 165

页数：8

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