Active Flow Separation Control on a Generic UHBR Engine High-Lift Configuration by Means of Suction and Oscillatory Blowing

Junaid Ullah, Shay Monat, Avraham Seifert, Thorsten Lutz, Ewald Krämer

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

The effect of suction and oscillatory blowing (SaOB) on local flow separation in the slat cutout region downstream from a UHBR engine is investigated by means of URANS simulations. The simulation environment mirrors the wind tunnel test of an UHBR high-lift configuration conducted at the small scale low speed wind tunnel at Tel-Aviv University. The validated CFD results are employed to assess the beneficial effect of SaOB compared to individual actuation by means of suction and oscillatory blowing. Both investigated flow control mechanisms are effective in significantly attenuating flow separation and a combined actuation allows to reduce external mass flow requirements by additional 15%. The excitation of the flow in the slat cutout region affects the flow field on large parts of the upper wing. A decrease in lift augmentation by flow control through SaOB compared to oscillatory blowing is most likely attributable to the sensitivities of the longitudinal vortices and corner flow separation.

Original languageEnglish
Title of host publicationNotes on Numerical Fluid Mechanics and Multidisciplinary Design
PublisherSpringer Science and Business Media Deutschland GmbH
Pages365-384
Number of pages20
DOIs
StatePublished - 2021

Publication series

NameNotes on Numerical Fluid Mechanics and Multidisciplinary Design
Volume145
ISSN (Print)1612-2909
ISSN (Electronic)1860-0824

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