On the use of sweeping jets to augment the lift of a λ-wing

Philipp Tewes, Lutz Taubert, Israel J Wygnanski

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

30 Citations (Scopus)

Abstract

Super-critical airfoils that are optimized for high speed subsonic flight require complex auxiliary high-lift systems for take-off and landing. A lambda wing model, based on such an airfoil, but containing simple flaps augmented by sweeping jet actuators, was constructed and tested. The purpose of these tests was to assess the efficacy of this method of separation control on a realistic wing configuration. Force and pressure measurements were carried out on this wing as well as surface flow visualization that used tufts and china clay. The strength of this actuation was altered and its effects were assessed. The orientation of the actuators was also altered for the outboard flap. The first flap had actuators aligned with the free stream while the second one had them parallel to the leading-edge that was swept back at 40°. The actuation from the second set of flaps turned out to be more effective because it affected only the decelerating flow component and no momentum was wasted on span-wise flow. These observations reaffirmed the ideas embedded in the boundary layer "independence principle" for large aspect ratio swept back cylinders.

Original languageEnglish (US)
Title of host publication28th AIAA Applied Aerodynamics Conference
StatePublished - 2010
Event28th AIAA Applied Aerodynamics Conference - Chicago, IL, United States
Duration: Jun 28 2010Jul 1 2010

Other

Other28th AIAA Applied Aerodynamics Conference
CountryUnited States
CityChicago, IL
Period6/28/107/1/10

Fingerprint

Flaps
Actuators
Airfoils
Kaolinite
Force measurement
Takeoff
Flow visualization
Pressure measurement
Landing
Aspect ratio
Momentum
Boundary layers

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Tewes, P., Taubert, L., & Wygnanski, I. J. (2010). On the use of sweeping jets to augment the lift of a λ-wing. In 28th AIAA Applied Aerodynamics Conference [2010-4689]

On the use of sweeping jets to augment the lift of a λ-wing. / Tewes, Philipp; Taubert, Lutz; Wygnanski, Israel J.

28th AIAA Applied Aerodynamics Conference. 2010. 2010-4689.

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

Tewes, P, Taubert, L & Wygnanski, IJ 2010, On the use of sweeping jets to augment the lift of a λ-wing. in 28th AIAA Applied Aerodynamics Conference., 2010-4689, 28th AIAA Applied Aerodynamics Conference, Chicago, IL, United States, 6/28/10.
Tewes P, Taubert L, Wygnanski IJ. On the use of sweeping jets to augment the lift of a λ-wing. In 28th AIAA Applied Aerodynamics Conference. 2010. 2010-4689
Tewes, Philipp ; Taubert, Lutz ; Wygnanski, Israel J. / On the use of sweeping jets to augment the lift of a λ-wing. 28th AIAA Applied Aerodynamics Conference. 2010.
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