Search: onr:"swepub:oai:DiVA.org:kth-267864" >
Shear Layer and She...
Shear Layer and Shedding Modes Excitations of a Backward-Facing Step Flow by Surface Plasma Discharge
- Article/chapterEnglish2020
Publisher, publication year, extent ...
-
2019-10-18
-
Cham :Springer,2020
-
printrdacarrier
Numbers
-
LIBRIS-ID:oai:DiVA.org:kth-267864
-
https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-267864URI
-
https://doi.org/10.1007/978-3-030-29688-9_3DOI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:kap swepub-publicationtype
Notes
-
QC 20200219
-
The present experimental study interests in determining the influence of a linear plasma actuator (dielectric barrier discharge) on the development of a separated turbulent shear layer. More specifically, the plasma actuator is used to impose periodic perturbations at the step corner of a backward-facing step. Two different modes of excitation are explored. One concerns the shear layer mode of instability, a mode whose amplification leads to a minimization of the recirculation bubble. The present investigation shows how a dielectric barrier discharge plasma actuator can impose periodic perturbations that excite the shear layer mode and result in a strong regularization of the vortex street. The case of excitation at the shedding mode is also experimentally investigated using a DBD actuator. The measurements show the increase in Reynolds stress caused by this excitation as well as the specific growing mechanism of the shear layer. Indeed, phase-averaged flow measurements highlights the difference in the mechanism of development of the shear layer regarding the type of excitation used, the shear layer mode promoting a growing mechanism by fluid entrainment while the shedding mode enhancing the pairing of successive vortical flow structures.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Sujar Garrido, PatriciaKTH,Strömningsmekanik och Teknisk Akustik,Linné Flow Center, FLOW(Swepub:kth)u1ipfepj
(author)
-
Bonnet, J. -P
(author)
-
Moreau, E.
(author)
-
KTHStrömningsmekanik och Teknisk Akustik
(creator_code:org_t)
Related titles
-
In:Advances in Effective Flow Separation Control for Aircraft Drag ReductionCham : Springer, s. 55-74
Internet link
Find in a library
To the university's database