Turbulent Friction Drag Reduction: From Feedback to Predetermined, and Feedback Again

研究成果: Conference contribution

抄録

We overview the recent attempts for turbulent friction drag reduction and related studies, by focusing on those conducted in our research group. While the earlier studies for friction drag reduction mainly targeted at suppression of quasi-streamwise vortices using feedback control, predetermined control methods using streamwise traveling waves or a uniform blowing have also been extensively investigated in the last decade. For both the streamwise traveling wave of wall deformation and the uniform blowing, their drag reduction capabilities have been confirmed well by direct numerical simulation at relatively low Reynolds numbers. Prediction of their drag reduction capabilities at higher Reynolds numbers and attempts for experimental confirmation are also intensively ongoing toward their practical implementation. We also introduce our practice on the application of resolvent analysis for designing a more effective feedback control law. In addition, we briefly introduce some recent attempts on the applications of machine learning to turbulent flows, which may be utilized for a better design of flow control in future.

本文言語English
ホスト出版物のタイトルFluid-Structure-Sound Interactions and Control - Proceedings of the 5th Symposium on Fluid-Structure-Sound Interactions and Control
編集者Marianna Braza, Yannick Hoarau, Yu Zhou, Anthony D. Lucey, Lixi Huang, Georgios E. Stavroulakis
出版社Springer Science and Business Media Deutschland GmbH
ページ375-384
ページ数10
ISBN(印刷版)9789813349599
DOI
出版ステータスPublished - 2021
イベント5th Symposium on Fluid-Structure-Sound Interactions and Control, FSSIC 2019 - Chania, Greece
継続期間: 2019 8 272019 8 30

出版物シリーズ

名前Lecture Notes in Mechanical Engineering
ISSN(印刷版)2195-4356
ISSN(電子版)2195-4364

Conference

Conference5th Symposium on Fluid-Structure-Sound Interactions and Control, FSSIC 2019
国/地域Greece
CityChania
Period19/8/2719/8/30

ASJC Scopus subject areas

  • 自動車工学
  • 航空宇宙工学
  • 機械工学
  • 流体および伝熱

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