Control of a laminar separating boundary layer by induced stationary perturbations

被引：11

作者：

Boiko, A. V. ^{[1
]}

Dovgal, A. V. ^{[1
]}

Hein, S. ^{[2
]}

机构：

[1] SB RAS, Khristianovich Inst Theoret & Appl Mech, Novosibirsk 630090, Russia

[2] DLR, Inst Aerodynam & Flow Technol, D-37073 Gottingen, Germany

来源：

EUROPEAN JOURNAL OF MECHANICS B-FLUIDS | 2008年 / 27卷 / 04期

关键词：

laminar flow separation; separation control; hydrodynamic instability;

D O I：

10.1016/j.euromechflu.2007.09.005

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Wind-tunnel data on stationary streaky structures developing in a laminar flow behind a backward-facing step on a flat plate are presented. The streaks were generated in a controlled manner by a row of three-dimensional surface humps placed periodically in the span-wise direction close to the separation line. The mean flow distortion of the separation region created in this way was documented by hot-wire measurements. Details of the evolution of the stationary perturbations in the separation region as well as their effect upon the oscillatory flow component, which are of interest due to elaboration of prospective methods for control of low-speed aerodynamics, are elucidated. (C) 2007 Elsevier Masson SAS. All rights reserved.

引用

页码：466 / 476

页数：11

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