Dynamic stall control by oscillatory forcing

D. Greenblatt, Israel J Wygnanski

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

16 Citations (Scopus)

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

Fingerprint

airfoils
Airfoils
deflection
drag
oscillation
rotary wing aircraft
moments
Flaps
blowing
leading edges
shoulders
Blow molding
Drag
Mass transfer
incidence
oscillations
effect

ASJC Scopus subject areas

  • Engineering(all)
  • Space and Planetary Science

Cite this

Greenblatt, D., & Wygnanski, I. J. (1998). Dynamic stall control by oscillatory forcing. In 36th AIAA Aerospace Sciences Meeting and Exhibit [AIAA-98-0676] American Institute of Aeronautics and Astronautics Inc, AIAA.

Dynamic stall control by oscillatory forcing. / Greenblatt, D.; Wygnanski, Israel J.

36th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics Inc, AIAA, 1998. AIAA-98-0676.

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

Greenblatt, D & Wygnanski, IJ 1998, Dynamic stall control by oscillatory forcing. in 36th AIAA Aerospace Sciences Meeting and Exhibit., AIAA-98-0676, American Institute of Aeronautics and Astronautics Inc, AIAA, 36th AIAA Aerospace Sciences Meeting and Exhibit, 1998, Reno, United States, 1/12/98.
Greenblatt D, Wygnanski IJ. Dynamic stall control by oscillatory forcing. In 36th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics Inc, AIAA. 1998. AIAA-98-0676
Greenblatt, D. ; Wygnanski, Israel J. / Dynamic stall control by oscillatory forcing. 36th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics Inc, AIAA, 1998.
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