Utilizing vortex acceleration to improve the efficiency of Air Jet Vortex Generators

S. Shun, N. A. Ahmed

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

37 Citations (Scopus)

Abstract

Recent experimental investigations conducted on Air Jet Vortex Generators (AJVG) featuring a smoothly increasing injection width produced promising results when the device was used to reduce the magnitude of flow separation about an airfoil. Testing was conducted at a Reynolds number of 6.5 × 105 on a NACA 6 series airfoil equipped with an array of the devices. The injection width monotonically increased once by a magnitude of e over the length of the device, which was tested with two main groups of blowing profiles. One set of blowing profiles featured an injection velocity that monotonically increased once by a magnitude of e. The other set of blowing profiles had an injection velocity that was constant. The exponential blowing profiles consumed less energy to produce incremental gains in lift coefficient between 0.023-0.18 when compared to the blowing profiles featuring a constant injection velocity. A 14% reduction in energy consumption was noted for a 0.16 incremental gain in lift coefficient. The current work experimentally determines the performance of the same AJVG under conditions where the boundary layer was artificially tripped to mimic the turbulence associated with operations at elevated Reynolds numbers.

Original languageEnglish
Title of host publication6th AIAA Flow Control Conference 2012
Publication statusPublished - 2012
Externally publishedYes
Event6th AIAA Flow Control Conference 2012 - New Orleans, LA, United States
Duration: 25 Jun 201228 Jun 2012

Publication series

Name6th AIAA Flow Control Conference 2012

Conference

Conference6th AIAA Flow Control Conference 2012
Country/TerritoryUnited States
CityNew Orleans, LA
Period25/06/1228/06/12

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Aerospace Engineering
  • Control and Systems Engineering

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