Dynamic actuation for delta wing post stall flow control

Anja Kölzsch, Sophie Blanchard, Christian Breitsamter

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

3 Scopus citations

Abstract

The manipulation of delta wing flow by active and passive flow control methods is of great interest for increasing the performance (e.g. lift enhancement) of such configurations. This work presents experimental results in the post-stall regime at very high angles of attack (α = 35–45°) on a 65° sweptback generic half delta wing configuration (VFE-2 geometry)with sharp leading edge using slot actuators for pulsed blowing along the leading edge. The study comprises results of force, velocity and pressure measurements and substantiates the receptivity of the shear layer for the pulsed excitation. For α = 35°, an actuation at F+ ≈ 2.7 effects a retardation of vortex breakdown. For α = 45°, the optimum pulse frequency was found at F+ = 1.0–1.5, which leads to the re-establishment of a burst vortex and a significant increase in lift, thus satisfying the aim of enhancing aerodynamic performance.

Original languageEnglish
Title of host publicationNew Results in Numerical and Experimental Fluid Mechanics X - Contributions to the 19th STAB/DGLR, 2014
EditorsAndreas Dillmann, Ewald Krämer, Gerd Heller, Christian Breitsamter, Claus Wagner
PublisherSpringer Verlag
Pages823-832
Number of pages10
ISBN (Print)9783319272788
DOIs
StatePublished - 2016
Event19th Symposium on New Results in Numerical and Experimental Fluid Mechanics, DGLR/STAB - Munich, Germany
Duration: 4 Nov 20145 Nov 2014

Publication series

NameNotes on Numerical Fluid Mechanics and Multidisciplinary Design
Volume132
ISSN (Print)1612-2909

Conference

Conference19th Symposium on New Results in Numerical and Experimental Fluid Mechanics, DGLR/STAB
Country/TerritoryGermany
CityMunich
Period4/11/145/11/14

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