On Transition from Laminar to Turbulent Flow
On Transition from Laminar to Turbulent Flow
复制标题
关于从层流到湍流的转变
DOI：
10.1063/1.1722760
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发表时间：
1957
影响因子：
3.2
通讯作者：
John C. Hegarty
中科院分区：
文献类型：
--
作者：
F. R. Hama;J. D. Long;John C. Hegarty
对与边界层转变相关的流动现象的水箱观察表明，二维离散涡线（被认为是放大扰动波的结果）在剪切流中具有形成具有明显横向波长的三维涡环的强烈趋势。涡环的形成和发展被发现是在涡环顶部附近和边界层外边缘附近发生湍流点之前的基本特征。这种形成和发展提供了尾流和射流以及边界层中层流到湍流转变的指导原则。
Water‐tank observations of the flow phenomena associated with boundary‐layer transition have revealed that a two‐dimensional discrete vortex line, which is considered to be the consequence of an amplified perturbation wave, has a strong tendency, in shear flows, to form three‐dimensional vortex loops with a marked transverse wavelength. The formation and development of the vortex loop is found to be the essential feature preceding the creation of a turbulent spot which takes place near the top of the vortex loop and near the outer edge of the boundary layer. This formation and development provides the guiding principle of laminar‐to‐turbulent transition in wakes and jets as well as in the boundary layer.