Lock-on to a high-lift state with oscillatory forcing in a three-dimensional wake flow

Kunihiko Taira, Clarence Worth Rowley, Tim Colonius

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Scopus citations

Abstract

Flow control is applied to a three-dimensional post-stall flow around a rectangular low-aspect-ratio wing. Steady actuation is used to examine effective flow control setups that modify the vortex dynamics in the wake and achieve increase in lift. For one of the setups, oscillatory forcing is then used to examine the influence of actuation frequency. It is found that sinusoidal actuation requires less momentum to the flow field to achieve lift increase compared to steady momentum injection. There are two observed ranges of forcing frequency at which the flow locks onto period-one and period-two high-lift states. Discussions of the ongoing work on stabilizing separated flow about these periodic high-lift states are offered.

Original languageEnglish (US)
Title of host publicationActive Flow Control II
Subtitle of host publicationPapers Contributed to the Conference "Active Flow Control II 2010", Berlin, Germany, May 26-28, 2010
EditorsRudibert King
Pages81-93
Number of pages13
DOIs
StatePublished - 2010

Publication series

NameNotes on Numerical Fluid Mechanics and Multidisciplinary Design
Volume108
ISSN (Print)1612-2909

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

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    Taira, K., Rowley, C. W., & Colonius, T. (2010). Lock-on to a high-lift state with oscillatory forcing in a three-dimensional wake flow. In R. King (Ed.), Active Flow Control II: Papers Contributed to the Conference "Active Flow Control II 2010", Berlin, Germany, May 26-28, 2010 (pp. 81-93). (Notes on Numerical Fluid Mechanics and Multidisciplinary Design; Vol. 108). https://doi.org/10.1007/978-3-642-11735-0_6