Abstract
The paper reports on shape of a three-dimensional coherent structure in a velocity field of a high-swirl turbulent jet with the bubble-type vortex breakdown. A set of the 3D instantenous velocity fields was measured by using the tomographic particle image velocimetry (tomographic PIV) technique and processed by the proper orthogonal decomposition (POD) method. The detected intensive coherent velocity component corresponded to a helical vortex core of the swirling jet and two secondary spiral vortices. The entire coherent structure was rotating around the jet axis in compliance with the direction of the flow swirl. From the 3D data it is concluded that the dynamics of the strsucture can be described by a traveling wave equation: Re[A(y, r)·ei(mθ + ky - ωt)] with the number of the spiral mode m = +1 for positively defined k and ω.
| Original language | English |
|---|---|
| Pages (from-to) | 301-304 |
| Number of pages | 4 |
| Journal | Thermophysics and Aeromechanics |
| Volume | 23 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Mar 2016 |
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Keywords
- coherent mode
- POD
- swirling jet
- tomographic PIV
- vortex core breakdown
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
Cite this
A swirling jet with vortex breakdown : three-dimensional coherent structures. / Alekseenko, S. V.; Dulin, V. M.; Tokarev, M. P.; Markovich, D. M.
In: Thermophysics and Aeromechanics, Vol. 23, No. 2, 01.03.2016, p. 301-304.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A swirling jet with vortex breakdown
T2 - three-dimensional coherent structures
AU - Alekseenko, S. V.
AU - Dulin, V. M.
AU - Tokarev, M. P.
AU - Markovich, D. M.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - The paper reports on shape of a three-dimensional coherent structure in a velocity field of a high-swirl turbulent jet with the bubble-type vortex breakdown. A set of the 3D instantenous velocity fields was measured by using the tomographic particle image velocimetry (tomographic PIV) technique and processed by the proper orthogonal decomposition (POD) method. The detected intensive coherent velocity component corresponded to a helical vortex core of the swirling jet and two secondary spiral vortices. The entire coherent structure was rotating around the jet axis in compliance with the direction of the flow swirl. From the 3D data it is concluded that the dynamics of the strsucture can be described by a traveling wave equation: Re[A(y, r)·ei(mθ + ky - ωt)] with the number of the spiral mode m = +1 for positively defined k and ω.
AB - The paper reports on shape of a three-dimensional coherent structure in a velocity field of a high-swirl turbulent jet with the bubble-type vortex breakdown. A set of the 3D instantenous velocity fields was measured by using the tomographic particle image velocimetry (tomographic PIV) technique and processed by the proper orthogonal decomposition (POD) method. The detected intensive coherent velocity component corresponded to a helical vortex core of the swirling jet and two secondary spiral vortices. The entire coherent structure was rotating around the jet axis in compliance with the direction of the flow swirl. From the 3D data it is concluded that the dynamics of the strsucture can be described by a traveling wave equation: Re[A(y, r)·ei(mθ + ky - ωt)] with the number of the spiral mode m = +1 for positively defined k and ω.
KW - coherent mode
KW - POD
KW - swirling jet
KW - tomographic PIV
KW - vortex core breakdown
UR - http://www.scopus.com/inward/record.url?scp=84975705264&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84975705264&partnerID=8YFLogxK
U2 - 10.1134/S0869864316020189
DO - 10.1134/S0869864316020189
M3 - Article
VL - 23
SP - 301
EP - 304
JO - Thermophysics and Aeromechanics
JF - Thermophysics and Aeromechanics
SN - 0869-8643
IS - 2
ER -