Abstract

Vertical velocity profiles are obtained experimentally for the boundary layer of a flow with an inverse pressure gradient in different phases of the periodic process of fluid deceleration. At the greatest drop in velocity, the profile has a local minimum with two inflection points at the upper boundary of the viscous layer. Chains of vortices then form at this location, testifying to a loss of stability of the laminar motion.

中文翻译：

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逆向压力梯度边界层流动的特征

摘要

在流体减速的周期性过程的不同阶段中，通过反向压力梯度，通过实验获得了边界层的垂直速度分布曲线。在最大速度下降时，轮廓具有局部最小值，在粘性层的上边界具有两个拐点。然后在该位置形成漩涡链，证明层流运动的稳定性丧失。