Effect of a trailing-edge jet on fin buffeting

S. Phillips, C. Lambert, I. Gursul

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


Effect of a trailing-edge jet on the interaction of a leading-edge vortex with a fin and resulting fin buffeting was investigated in water tunnel as well as wind tunnel experiments. Flow visualization showed that fin-induced vortex breakdown can be delayed into the wake even for the head-on collision of the leadingedge vortex with the fin. Hence it was demonstrated that the adverse pressure gradient due to the presence of the fin could be overcome with a deflected trailing-edge jet. Delay of vortex breakdown into the wake even for relatively small values of jet velocity ratio is possible for deflected jets, whereas the effectiveness of the jet with no deflection is very limited. Buffeting response of a flexible fin in wind tunnel experiments showed that there was considerable delay of the onset of buffeting to higher angles of attack with increasing jet momentum for =30° and 45°. Depending on the fin location with respect to the leading-edge vortex, it was possible to shift the buffeting envelope as much as 12° in incidence of the wing.

Original languageEnglish
Title of host publication1st Flow Control Conference
PublisherAmerican Institute of Aeronautics and Astronautics
ISBN (Print)9781624101052
Publication statusPublished - 1 Dec 2002
Externally publishedYes
Event1st Flow Control Conference 2002 - St. Louis, United States
Duration: 24 Jun 200226 Jun 2002


Conference1st Flow Control Conference 2002
Country/TerritoryUnited States
CitySt. Louis

ASJC Scopus subject areas

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


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