End-effects of a finite synthetic jet on flow control

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Abstract

The end-effects of a finite synthetic jet used for controlling the flow around a two-dimensional circular cylinder are experimentally investigated in this study. The Reynolds number based on the cylinder diameter is Re = 800, and the corresponding natural vortex shedding frequency f0 is 0.24 Hz (St = 0.21). The synthetic jet is actuated at excitation frequency fe/f0 = 2.08, with the equivalent momentum coefficient Cμ= 0.139. Six x–y planes of view from the mid-span to one of the slot ends with identical interval 5 mm are measured using twodimensional time-resolved PIV system. It is found that the end-effects of the finite synthetic jet do not have a crucial influence on flow fields in the mid-span regions, which are independent of the slot length if it is longer than one cylinder diameter.

Original languageEnglish
Title of host publicationLecture Notes in Mechanical Engineering
PublisherSpringer Heidelberg
Pages129-134
Number of pages6
DOIs
StatePublished - 2014

Publication series

NameLecture Notes in Mechanical Engineering
Volume8
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364

Keywords

  • Circular cylinder
  • End-effects
  • Finite synthetic jet
  • Flow control

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