Near Full-Scale Application of Suction and Pulsed Blowing to Mitigate Local Separation

Shay Monat*, Bar Mizrahi, Ofek Drori, Avraham Seifert, Vitaly Soudakov

*Corresponding author for this work

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

Abstract

In an effort to create more fuel-efficient airplanes, larger ultra-high bypass ratio (UHBR) engines are being developed. However, when installed under the wing, large-diameter engines have harmful effects on the aerodynamic performance of the wing. This is because the large and near-wing engine pylon forces a wider slat-cut-out that in turn leads to local boundary layer separation and a complex system of streamwise vortices. To regain the lift lost due to this interaction, a novel solution by implementing active flow control devices in the form of suction and oscillatory blowing devices (SaOB) is presented in this paper. Near full-scale wind tunnel tests have been conducted as part of the EU Cleansky2 INAFLOWT project with the goal of recovering the lift of this setup, using a reduced mass-flow rate, within the current airplane capability. The tests were conducted on a wing model with a chord length of 3.26 [m] at Reynolds numbers range of 4.5-8.8 millions. The approach described in this paper shows a substantial improvement in performance using significantly reduced mass-flow compared to previous successful passive and active flow control studies on the same model.

Original languageEnglish
Title of host publicationIACAS 2022 - 61st Israel Annual Conference on Aerospace Science
PublisherTechnion Israel Institute of Technology
ISBN (Electronic)9781713862253
StatePublished - 2022
Event61st Israel Annual Conference on Aerospace Science, IACAS 2022 - Haifa, Israel
Duration: 9 Mar 202210 Mar 2022

Publication series

NameIACAS 2022 - 61st Israel Annual Conference on Aerospace Science

Conference

Conference61st Israel Annual Conference on Aerospace Science, IACAS 2022
Country/TerritoryIsrael
CityHaifa
Period9/03/2210/03/22

Funding

FundersFunder number
European Commission754307

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