Full Content is available to subscribers

Subscribe/Learn More  >

Active Control of Flow Field Structure in a Transitional Flat Plate Boundary Layer

[+] Author Affiliations
Takeshi Sakai, Seiichiro Izawa, Ao-Kui Xiong, Yu Fukunishi

Tohoku University, Sendai, Miyagi, Japan

Koichi Shibamoto

Toshiba Corporation, Ohtawara, Tochigi, Japan

Paper No. FEDSM2003-45234, pp. 2705-2710; 6 pages
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 1: Fora, Parts A, B, C, and D
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3696-7 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME


The aim of this study is to develop a method to control two-dimensional Tollmien-Schlichting wave (T-S wave) and oblique wave at the early stage of transition of a flat-plate boundary layer. Small and thin piezo-ceramic (PZT) actuators are used as the control device. In this study, twelve actuators are attached in line in the spanwise direction on the flat-plate surface and wired independently from each other. These actuators are used to generate a wave with the same amplitude and opposite sign of the incoming wave in order to cancel it. From the experimental results, it is found that the cancellation of the velocity fluctuation is successful while the sweep angle of target wave is small. However, as the sweep angle becomes larger, the canceling effect becomes insufficient in some spanwise locations even when the phases and the amplitudes of the controlling signals are fine-tuned. It is also shown that the difficulty in the fine-tuning is due to the deformation of the velocity fluctuation pattern introduced by each actuator.

Copyright © 2003 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In