Boundary Layer Solution for the Turbulent Swirling Decay Flow Through a Fixed Pipe: SBR at the Inlet
Boundary Layer Solution for the Turbulent Swirling Decay Flow Through a Fixed Pipe: SBR at the Inlet
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DOI：
10.1115/imece2003-55300
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
A. Najafi;M. Saidi;M. Sadeghipour;M. Souhar
中科院分区：
文献类型：
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作者：
A. Najafi;M. Saidi;M. Sadeghipour;M. Souhar
本文对发展中的紊流旋流管道流动进行了数值和解析研究。根据边界层假设导出了控制方程。分别考虑了管道入口轴向速度和切向速度的均匀分布和实体旋转（SBR）分布。在边界层之外，流型被认为是势流。利用四阶龙格-库塔格式，得到了微分方程的数值解。进一步，通过对大罗斯比数控制方程的简化，得到了解析解。将数值计算结果与解析计算结果进行了比较，结果一致。作为一种替代解决方案，我们也进行了CFD分析，并应用了FLUENT软件来支持我们的方法。ASME版权所有©2003
In this study the developing turbulent swirling pipe flow is investigated both numerically and analytically. Governing equations are derived accompanying the boundary layer assumptions. Uniform and solid body rotation (SBR) distributions are taken into account for the axial and tangential velocities at the inlet of the pipe, respectively. Beyond the boundary layers, the flow pattern is considered to be the potential flow. Making use of the fourth-order Runge-Kutta scheme, the numerical solution of the differential equations is obtained. Further more, by simplifying the governing equations for large Rossby number, the analytical solution is performed. The results of numerical and analytical swirl intensity have been compared showing reasonable agreement. As an alternative solution, a CFD analysis has been done as well, having applied FLUENT software to support the ability of our methodology.Copyright © 2003 by ASME