Active control of oblique waves in a transitional boundary layer

Yu Fukunishi, K. Morita, M. Motoki, Y. Yokokawa

Research output: Contribution to journalArticlepeer-review

Abstract

The aim of this paper is to actively control oblique waves in a transitional boundary layer using piezo-ceramic actuators. Each actuator attached on the flat plate surface is thin enough to keep the boundary layer in the laminar state. The actuators introduce velocity fluctuation into the flow field by moving their edge for about several tens of μ-meters. The results show that these actuators are capable of generating two-dimensional T-S wave, a pair of oblique waves crossing each other and a one-sided oblique wave. The capability of the actuator to generate a pair of oblique waves upstream and then weakening it downstream was successfully demonstrated by using two rows of actuators.

Original languageEnglish
Pages (from-to)275-279
Number of pages5
JournalZhongguo Hangkong Taikong Xuehui Huikan/Transactions of the Aeronautical and Astronautical Society of the Republic of China
Volume34
Issue number3
Publication statusPublished - 2002 Sep 1

Keywords

  • Boundary layer
  • Oblique waves
  • Piezo-ceramic actuator
  • Transition

ASJC Scopus subject areas

  • Aerospace Engineering

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