Periodic forcing of the turbulent boundary layer on a body of revolution

被引：0
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作者：
Kornilov, Vladimir I. [1 ,2 ]
Boiko, Andrei V. [1 ,3 ]
机构：
[1] Russian Academy of Sciences, 630090, Novosibirsk, Russia
[2] Department of Experimental Aerogasdynamics, Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch
[3] Department of Aerophysical Studies of Subsonic Flows, Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch
来源：
AIAA Journal | 2008年 / 46卷 / 03期
关键词：
The effect of local periodic forcing in the form of blowing/suction through a transverse annular slot on the properties of a turbulent boundary layer formed on an axisymmetric body of revolution in an incompressible flow is studied experimentally. The Reynolds number based on the momentum thickness of the boundary layer in front of the annular slot is 1348; The dimensionless amplitude of the forced signal A0 was set to be 0.2; 0.3; and 0.4. The frequency of the forced signal in wall units was varied withinf+ = 0.0051-0.0126. The slot width s+ in wall units was 47. A permanent decrease in local skin friction; reaching up to 70%; is observed to occur at a distance from the slot approximately equal to half a displacement thickness δ*; followed by the recovery of the skin friction to the undisturbed value at 25δ*. Copyright © 2007 by the American Institute of Aeronautics and Astronautics; Inc. All rights reserved;
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页码：653 / 663
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