Similarity and stability of the laminar boundary layer in a streamwise corner
Similarity and stability of the laminar boundary layer in a streamwise corner
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流向角部层流边界层的相似性和稳定性
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
M. Zamir
中科院分区：
文献类型：
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作者：
M. Zamir
本文研究了沿两固体直角交点线的层流粘性流动的现状，分析了各种实验结果与理论结果之间的显著差异。本文提出了新的实验结果，其中角边界层的稳定性是根据其速度分布的流向相似程度来检验的。当向流压力梯度为零，雷诺数远高于104左右时，该层不以稳定的层流形式存在。新的结果也有助于解释不同实验结果之间的差异，以及理论与实验之间的差异，这些差异是多年来拐角边界层问题的特征。通过外推，得到了在零压力梯度极限情况下角边界层稳定状态下的速度分布的近似预测。并将预测剖面与现有理论结果进行了比较。
The study of laminar viscous flow along the line of intersection of two solid surfaces at right angles is examined in its present state, and outstanding differences between various experimental and theoretical results are analysed. New experimental results are presented in which the stability of the corner boundary layer is examined in terms of the degree of streamwise similarity of its velocity profiles. Conclusive evidence is found that the layer does not exist in stable laminar form when the streamwise pressure gradient is zero and the Reynolds number much above about 104. The new results also help to explain the differences between various experimental results, and between theory and experiment, which have characterized the corner boundary layer problem for several years. By extrapolation, an approximate prediction is obtained of what the velocity profile of the corner boundary layer would be in the limiting case of zero pressure gradient, if the layer were stable in that state. The predicted profile is compared with the results of current theories.