Velocity measurements on a delta wing with periodic blowing and suction

Yair Guy, Julie A. Morrow, Thomas E. Mclaughlin, Israel J Wygnanski

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

13 Citations (Scopus)

Abstract

Velocity distribution over a 70°-sweep delta wing with and without periodic flow excitation is experimentally investigated in a water tunnel at the USAF Academy. Periodic blowing and suction with zero net mass flux is applied at the leading edge of the wing. The velocity across the leading edge vortex is measured at angles of attack from 30° to 45°. All tests are performed at a freestream velocity of 0.12 m/s, corresponding to a chord Reynolds number of 3.3*104. It is found that periodic flow excitation significantly delays vortex breakdown. The efficacy of the periodic flow excitation in delaying vortex breakdown increases as the angle of attack increases. The vortex breakdown location is delayed by 0.25 chordlength at an angle of attack of 30° and by as much as 0.5 chordlength at an angle of attack of 45°. It is also found that periodic flow excitation increases the core velocity after the onset of natural breakdown. This is consistent with the results that were obtained in previous wind tunnel experiments with a similar, scaled-up wing. The increased velocity indicates a decreased pressure, hence a lift increase can be anticipated at angles of attack where vortex breakdown occurs without flow excitation.

Original languageEnglish (US)
Title of host publication38th Aerospace Sciences Meeting and Exhibit
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
StatePublished - 2000
Event38th Aerospace Sciences Meeting and Exhibit 2000 - Reno, NV, United States
Duration: Jan 10 2000Jan 13 2000

Other

Other38th Aerospace Sciences Meeting and Exhibit 2000
CountryUnited States
CityReno, NV
Period1/10/001/13/00

Fingerprint

delta wings
angle of attack
blowing
vortex breakdown
suction
Angle of attack
Blow molding
velocity measurement
Velocity measurement
vortex
Vortex flow
excitation
leading edges
wings
swept wings
hydraulic test tunnels
wind tunnels
Velocity distribution
wind tunnel
Reynolds number

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Guy, Y., Morrow, J. A., Mclaughlin, T. E., & Wygnanski, I. J. (2000). Velocity measurements on a delta wing with periodic blowing and suction. In 38th Aerospace Sciences Meeting and Exhibit American Institute of Aeronautics and Astronautics Inc..

Velocity measurements on a delta wing with periodic blowing and suction. / Guy, Yair; Morrow, Julie A.; Mclaughlin, Thomas E.; Wygnanski, Israel J.

38th Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics Inc., 2000.

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

Guy, Y, Morrow, JA, Mclaughlin, TE & Wygnanski, IJ 2000, Velocity measurements on a delta wing with periodic blowing and suction. in 38th Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics Inc., 38th Aerospace Sciences Meeting and Exhibit 2000, Reno, NV, United States, 1/10/00.
Guy Y, Morrow JA, Mclaughlin TE, Wygnanski IJ. Velocity measurements on a delta wing with periodic blowing and suction. In 38th Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics Inc. 2000
Guy, Yair ; Morrow, Julie A. ; Mclaughlin, Thomas E. ; Wygnanski, Israel J. / Velocity measurements on a delta wing with periodic blowing and suction. 38th Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics Inc., 2000.
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