Surface pressure and flow field behind an oscillating fence submerged in turbulent boundary layer

Manjinder Singh, Jonathan W. Naughton, Taro Yamashita, Hiroki Nagai, Keisuke Asai

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Phase-locked PSP and PIV measurements were used to study the evolution of three-dimensional disturbances produced by an oscillating fence actuator immersed in a zero pressure gradient turbulent boundary layer. For the single fence frequency studied, strong three-dimensionality is observed in the vortical structure that varies along the span of the fence soon after the fence enters the flow. At the midspan, the structure grows, weakens, and convects faster than at other locations. As the fence height increases, the data indicate that the vortical structure terminates near the edge of the fence. In contrast, the vortex structure terminates on the plate surface adjacent to the fence edge as the fence descends, similar to a wake vortex of a stationary obstacle. This study demonstrates that the combined use of surface and flow-field diagnostics provide a link between flow field and surface features, yielding an understanding of the flow that would have not been possible with any one technique.

Original languageEnglish
Pages (from-to)701-714
Number of pages14
JournalExperiments in Fluids
Volume50
Issue number3
DOIs
Publication statusPublished - 2011 Mar 1

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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