On the breakdown of the wave packet trailing a turbulent spot in a laminar boundary layer
On the breakdown of the wave packet trailing a turbulent spot in a laminar boundary layer
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层流边界层中尾随湍流点的波包的分解
DOI：
10.1017/s0022112089000017
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发表时间：
1989
影响因子：
3.7
通讯作者：
I. Wygnanski
中科院分区：
文献类型：
--
作者：
A. Glezer;Y. Katz;I. Wygnanski
为了确定倾斜波包与过渡点相互作用的程度，研究了层流边界层中两个斜波包尾随过渡点的演化。在Falkner-Skan常数分别为β=0和β=0.2的两个略有不同的层流边界层上进行的实验研究表明，极小的压力梯度可以显著影响层流边界层的稳定性和被湍斑污染的速度。一些简单的、新颖的统计程序被用来处理这些数据，并被用来强调对支配向湍流过渡的物理过程的理解。
The evolution of two oblique wave packets trailing, a transitional spot in a laminar boundary layer was investigated in order to determine the extent of the interaction between the packets and the spot. The experimental investigation, carried out on two slightly different laminar boundary layers characterized by Falkner-Skan constants of β = 0 and β = 0.2, revealed that very small pressure gradients can have significant effects on the stability of the laminar boundary layer and the rate at which it is contaminated by a turbulent spot. Some simple, novel statistical procedures for treating the data were developed and were used to accentuate the understanding of the physical processes governing transition to turbulence.