Skip to Main content Skip to Navigation
Conference papers

Proper Orthogonal Decomposition used for aerodynamic study and active control of annular jet instabilities using acoustic excitations

Abstract : The annular jet is an example of complex shear flow situations. Two axisymmetric shear layers, originating at the jet exit, one at the nozzle lip and the other at the centre body, eventually meet downstream or interact with each other. The main aim of this study is to observe and analyze the effects of active control using acoustic waves on an annular jet with a great diameter ratio (r= 0.91), in order to find a new way to reduce jet instabilities. This contribution discusses the application of Proper Orthogonal Decomposition to the P.I.V. (Particle Images Velocimetry) velocity fields of an annular jet and on a statistic of time resolved tomographic images of the initial zone of the annular jet. Acoustic waves are then applied on the annular jet with different frequencies (fundamental, first harmonic...). Measurements are conducted with a Reynolds number ReDo=107800. The fluctuation frequency of the stagnation point is known for this Reynolds number. The Strouhal number corresponding to this frequency is StDo = 0.27. Active control has already been used with round jets and has given promising results, but only a few studies have been conducted on annular jets in this field. This work will permit us essentially to have a better knowledge of annular jets and to meet manufacturers' needs.
Complete list of metadata

Cited literature [5 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00767697
Contributor : Amélie Danlos Connect in order to contact the contributor
Submitted on : Thursday, December 20, 2012 - 12:06:21 PM
Last modification on : Wednesday, February 23, 2022 - 3:38:08 AM
Long-term archiving on: : Thursday, March 21, 2013 - 3:48:45 AM

File

WSEAS_FMA08.pdf
Publisher files allowed on an open archive

Identifiers

  • HAL Id : hal-00767697, version 1

Citation

Amélie Danlos, Eric Rouland, Béatrice Patte-Rouland. Proper Orthogonal Decomposition used for aerodynamic study and active control of annular jet instabilities using acoustic excitations. 6th IASME/WSEAS International Conference on Fluid Mechanics and Aerodynamics, Aug 2008, Rhodes, Greece. pp.66-71. ⟨hal-00767697⟩

Share

Metrics

Record views

285

Files downloads

655