Statistical description of laminar-turbulent transition in a boundary layer at high freestream turbulence degree

被引：5
|
作者：
Ustinov, M. V.
机构：
来源：
FLUID DYNAMICS | 2013年 / 48卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
laminar-turbulent transition; boundary layer; turbulent spots; intermittence; FREE-STREAM TURBULENCE;
D O I：
10.1134/S0015462813020063
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The statistical approach is applied to calculate the intermittence coefficient in boundarylayer laminar-turbulent transition due to external turbulence. It is assumed that turbulent regions in the boundary layer are associated with the appearance of turbulent spots generated by the secondary instability of streaky structures that have reached a threshold amplitude. An universal dependence of the intermittence coefficient in the transition region on the velocity fluctuation amplitude and the Reynolds number is obtained. It describes well the experimental results.
引用
收藏
页码：192 / 200
页数：9
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