Global stability of a jet in crossflow

S. Bagheri 1 P. Schlatter 1 Peter Schmid 2 D.S. Henningson 1, *
* Corresponding author
1 Department of Mechanics [Stockholm]
Linné FLOW Center [Stockholm]
2 LadHyX - Laboratoire d'hydrodynamique
Abstract : A linear stability analysis shows that the jet in crossflow is characterized by self-sustained global oscillations for a jet-to-crossflow velocity ratio of 3. A fully three-dimensional unstable steady-state solution and its associated global eigenmodes are computed by direct numerical simulations and iterative eigenvalue routines. The steady flow, obtained by means of selective frequency damping, consists mainly of a (steady) counter-rotating vortex pair (CVP) in the far field and horseshoe-shaped vortices close to the wall. High-frequency unstable global eigenmodes associated with shear-layer instabilities on the CVP and low-frequency modes associated with shedding vortices in the wake of the jet are identified. Furthermore, different spanwise symmetries of the global modes are discussed. This work constitutes the first simulation-based global stability analysis of a fully three-dimensional base flow. © 2009 Cambridge University Press.
Document type :
Journal articles
Complete list of metadatas

Cited literature [21 references]  Display  Hide  Download
https://hal-polytechnique.archives-ouvertes.fr/hal-01002593
Contributor : Denis Roura <>
Submitted on : Monday, July 7, 2014 - 5:58:44 PM
Last modification on : Wednesday, March 27, 2019 - 4:39:25 PM
Long-term archiving on : Tuesday, October 7, 2014 - 10:41:35 AM

File

S0022112009006053a.pdf
Publisher files allowed on an open archive

Identifiers

Collections

X-LADHYX | X | PARISTECH | X-DEP-MECA

Citation

S. Bagheri, P. Schlatter, Peter Schmid, D.S. Henningson. Global stability of a jet in crossflow. Journal of Fluid Mechanics, Cambridge University Press (CUP), 2009, 624 (avril), pp.33-44. ⟨10.1017/s0022112009006053⟩. ⟨hal-01002593⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

228

Files downloads

786

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD