POD analysis of jet and vortex flows induced by oscillating backward facing step

Sertac Cadirci, Mustafa Ozsipahi*, Hasan Gunes

*Corresponding author for this work

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

Abstract

An oscillatory, zero-net-mass flux actuator system, Jet and Vortex Actuator (JaVA), is implemented on the step wall of a backward facing step (BFS) in order to control the recirculation zone behind BFS. The actuator plate has a sinusoidal motion determined by the amplitude and the operating frequency. The proposed control method based on suction and blowing with an oscillating backward facing step seems to be effective in reducing the recirculation zone length and preventing flow separation downstream of BFS. Modal investigation of flow fields are performed by means of Proper Orthogonal Decomposition (POD). POD is applied to time-dependant snapshots of velocity fields at several operating frequencies. The POD modes revealed the behavior of the flow past a BFS under the effect of active flow control.

Original languageEnglish
Title of host publicationProceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015
EditorsAntonio Segalini
PublisherSpringer Science and Business Media, LLC
Pages249-257
Number of pages9
ISBN (Print)9783319306001
DOIs
Publication statusPublished - 2016
Event5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015 - Stockholm, Sweden
Duration: 15 Jun 201518 Jun 2015

Publication series

NameSpringer Proceedings in Physics
Volume185
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Conference

Conference5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015
Country/TerritorySweden
CityStockholm
Period15/06/1518/06/15

Bibliographical note

Publisher Copyright:
© Springer International Publishing Switzerland 2016.

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