大雷诺数湍流边界层中的自相似中间结构
Self-Similar Intermediate Structures in Turbulent Boundary Layers At Large Reynolds Numbers
AI总结：
本文通过分析多种零压力梯度边界层数据，验证了雷诺数相关标度律在近壁自相似中间区的适用性，并发现了弱湍流下的另一中间自相似区，评估了湍流与粗糙度影响。
摘要：
处理多种零压力梯度边界层流动的数据表明，本文作者先前针对管道流动获得的依赖于雷诺数的标度律，能够精确描述紧邻黏性底层的自相似中间区域中速度随壁面距离的分布。对所有研究的流动，确定了定义边界层雷诺数所需的适当长度尺度。在自由来流湍流较弱的条件下，发现了位于自由来流与第一中间区域之间的另一个自相似中间区域。评估了自由来流湍流和壁面粗糙度的影响，并得出了结论。
英文摘要：
Processing the data from a large variety of zero-pressure-gradient boundary layer flows shows that the Reynolds-number-dependent scaling law, which the present authors obtained earlier for pipes, gives an accurate description of the velocity distribution in a self-similar intermediate region of distances from the wall adjacent to the viscous sublayer. The appropriate length scale that enters the definition of the boundary layer Reynolds number is found for all the flows under investigation. Another intermediate self-similar region between the free stream and the first intermediate region is found under conditions of weak free stream turbulence. The effects of turbulence in the free stream and of wall roughness are assessed, and conclusions are drawn.
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。
