Measurements in the near field of a square jet with vortex-generating tabs

X. K. Wang, S. C.M. Yu, L. P. Chua

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A square jet (Re H = 1130) with mixing tabs has been investigated using Laser Induced Fluorescence (LIF) and Laser Doppler Anemometer (LDA). The tabs were tilted either downstream (i.e., at θ= 45°) or upstream (i.e., at θ= 135°). With the existence of four tabs, the jet flow was bifurcated into a four finger structure. However, for the case of θ= 135°, there was an additional "mushroom" structure behind each tab. Smoke-wire visualizations on a delta wing (analog to the triangular tab) confirmed that a vortex pair would be formed regardless the tip tilted downstream or upstream; however, the rotating direction of the vortex pair for the two cases was opposite to each other. The results were used to explain the difference of flow structure between the two tabbed cases.

Original languageEnglish
Title of host publicationProceedings of the 2001 ASME Fluids Engineering Division Summer Meeting
Subtitle of host publicationForums
EditorsT.J. O Hern, T.J. O Hern
Pages877-882
Number of pages6
Volume1
Publication statusPublished - 2003
Externally publishedYes
Event2001 ASME Fluids Engineering Division Summer Meeting - New Orleans, LA, United States
Duration: 29 May 20011 Jun 2001

Publication series

NameProceedings of the ASME Fluids Engineering Division Summer Meeting
Volume1

Conference

Conference2001 ASME Fluids Engineering Division Summer Meeting
CountryUnited States
CityNew Orleans, LA
Period29/05/011/06/01

Keywords

  • Laser Doppler Anemometer (LDA)
  • Laser Induced Fluorescence (LIF)
  • Mixing tab
  • Square jet

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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