THE FREE-STREAM TURBULENCE EFFECT ON THE LAMINAR-TURBULENT TRANSITION IN THE SWEPT WING BOUNDARY LAYER

被引：0

作者：

Chernyshev, Sergey L. ^{[1
]}

Ivanov, Alexander I. ^{[1
]}

Kiselev, Andrey Ph. ^{[1
]}

Kuzminsky, Vladimir A. ^{[1
]}

Sboev, Dmitry S. ^{[1
]}

机构：

[1] Cent Aerohydrodynam Inst, Zhukovskii 140180, Moscow Reg, Russia

来源：

11TH WORLD CONGRESS ON COMPUTATIONAL MECHANICS; 5TH EUROPEAN CONFERENCE ON COMPUTATIONAL MECHANICS; 6TH EUROPEAN CONFERENCE ON COMPUTATIONAL FLUID DYNAMICS, VOLS V - VI | 2014年

关键词：

boundary layer; crossflow instability; transition; turbulence;

D O I：

暂无

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

The experimental investigation of laminar-turbulent transition caused by cross-flow instability in a boundary layer over swept wing was conducted. The influence of increasing of free-stream turbulence level on transition location was determined. The comparison is made of the results obtained with the boundary layer transition data for the straight wing with the same airfoil at similar external condition. It was shown that at high free-stream turbulence the "streaky structures" localized in space and time, which transforms into turbulent spots, are observed in the boundary layer of the swept wing. The transition location on the swept wing in this case shifts downstream compared with the straight wing tests. This fact contrasts sharply with the available data concerning the sweep angle influence on the transition location at the low-turbulence external flow. Application of the semi-empirical e(N)-method and empirical criteria to transition prediction is discussed.

引用

页码：7511 / 7520

页数：10

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