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arXiv physics/9904030physics.flu-dyn
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湍流中平均速度分布的计算

Computation of Mean Velocity Distribution in a Turbulent Flow

A. E. Karpelson

摘要:

本文提出了一种计算湍流中平均速度分布的近似方法。该方法基于雷诺应力和平均速度之间的关系式。利用压降和平均(总)流速的测量值,计算了各种流体和气体在不同管道和通道中的湍流特性,如平均速度和雷诺应力分布,并与实验测量值进行了比较。这些结果表明,在很大范围的雷诺数下,它们具有良好的一致性。

英文摘要:

An approximate method to compute mean velocity profiles in turbulent flows is developed. This approach is based on the equation connecting the Reynolds stress and mean velocity. By using the measured values of pressure drop and average (bulk) flow velocity, such characteristics of a turbulent flow as the mean velocity and Reynolds stress distributions were calculated and compared with the experimental measurements in different pipes and channels for various fluids and gases. These show good agreement for a wide range of Reynolds numbers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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