Dynamic stall control by oscillatory forcing

D. Greenblatt, Israel J Wygnanski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations

Abstract

A parametric study was undertaken to investigate the effect of oscillatory forcing (with zero net mass-flux) on an airfoil undergoing pitch oscillations at rotorcraft reduced frequencies. The primary objective of the study was to maximize the airfoil performance while simultaneously limiting moment excursions to typical pre-stalled conditions. The incidence angle excursions were limited to ±5° and a wide range reduced forcing frequencies and amplitudes were considered for Re<0.3×106 with various flap deflections and forcing locations. Significant increases in maximum lift and reductions in form drag were attained while simultaneously containing the moment excursions. Oscillatory forcing was found to be far superior to steady blowing and flap-shoulder forcing was found to be superior to leading-edge forcing.

Original languageEnglish (US)
Title of host publication36th AIAA Aerospace Sciences Meeting and Exhibit
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
StatePublished - 1998
Externally publishedYes
Event36th AIAA Aerospace Sciences Meeting and Exhibit, 1998 - Reno, United States
Duration: Jan 12 1998Jan 15 1998

Other

Other36th AIAA Aerospace Sciences Meeting and Exhibit, 1998
CountryUnited States
CityReno
Period1/12/981/15/98

ASJC Scopus subject areas

  • Engineering(all)
  • Space and Planetary Science

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