Effect of active control on optimal structures in wall turbulence

B. Q. Deng, C. X. Xu, W. X. Huang, G. X. Cui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effect of active control imposed at the wall on optimal structures in wall turbulence is investigated by using a linear transient growth model. When the detection plane of the control is located in the buffer layer, the transient growth of the near-wall structures can be suppressed, but the large scale motion can hardly be influenced as the Reynolds number increases, even when the control amplitude is enhanced. When the input signal for the control is detected in the logarithm region, the transient growth of the large-scale motions can be greatly suppressed, although a new peak occurs in the transient growth rate due to the strong blowing and suction at the wall. The results indicate that the flow information in the logarithmic region is crucial for constructing a control scheme to effectively manipulate the large-scale motions.

Original languageEnglish (US)
Title of host publicationInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
PublisherTSFP-8
ISBN (Electronic)9780000000002
StatePublished - 2013
Externally publishedYes
Event8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 - Poitiers, France
Duration: Aug 28 2013Aug 30 2013

Publication series

NameInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
Volume3

Other

Other8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
CountryFrance
CityPoitiers
Period8/28/138/30/13

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