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Skin Friction Drag Reduction Based on Unsteady Blowing Through One Array of Streamwise Slits

  • Y. Z. Li
  • Y. ZhouEmail author
Conference paper
  • 1.7k Downloads
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

An experimental study is conducted to reduce the skin friction drag in a turbulent boundary layer using periodic blowing through one array of streamwise slits. The blowing amplitude and frequency have been investigated and found to have great effects on the control performance. A maximum local skin friction reduction of 70 % has been observed at 33 wall unit downstream of the actuators, which is connected to a greatly enhanced mean energy dissipation rate based on the analysis of the hotwire and PIV data.

Keywords

Turbulent boundary layer Drag reduction Active control 

Notes

Acknowledgments

YZ wishes to acknowledge support from NSFC grant 11172085 and from Shenzhen Government grants JCYJ20120613144508935 and JCYJ20130402100505796.

References

  1. Bai HL, Zhou Y, Zhang WG, Xu SJ, Wang Y, Antonia RA (2014) Active control of a turbulent boundary layer based on local surface perturbation. J Fluid Mech 750:316–354CrossRefGoogle Scholar
  2. Itoh M, Tamano S, Yokota K, Taniguchi (2006) Drag reduction on a turbulent boundary layer on a flexible sheet undergoing a spanwise travelling wave motion. J Turbul 7(27):1–17Google Scholar
  3. Tardu SF (2001) Active control of near-wall turbulence by local oscillating blowing. J Fluid Mech 439:217–253CrossRefzbMATHGoogle Scholar
  4. Tardu SF, Doche O (2009) Active control of the turbulent drag by a localized periodical blowing dissymmetric in time. Exp Fluids 47(1):19–26CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Institute for Turbulence-Noise-Vibration Interaction and ControlShenzhen Graduate School, Harbin Institute of TechnologyShenzhenChina

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