TY - GEN
T1 - Coherent structures in a turbulent swirling jet under vortex breakdown. 3D PIV measurements
AU - Alekseenko, Sergey V.
AU - Dulin, Vladimir M.
AU - Tokarev, M. P.
AU - Markovich, Dmitriy M.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - The current study reports on spatial structure of a global mode of self-sustaining oscillations in a turbulent swirling jet under vortex breakdown conditions. Ensembles of 2D and 3D velocity fields were measured by stereoscopic and tomographic PIV systems, respectively, and were analysed via proper orthogonal decomposition. For the 2D PIV, the spatial resolution was sufficient to resolve most of the turbulent kinetic energy of the turbulent flow. The resolution in the case of tomographic PIV was lower, but the 3D instantaneous velocity fields unambiguously revealing that the global mode corresponds to a spiralling structure, counter-winded to the direction of the jet swirl.
AB - The current study reports on spatial structure of a global mode of self-sustaining oscillations in a turbulent swirling jet under vortex breakdown conditions. Ensembles of 2D and 3D velocity fields were measured by stereoscopic and tomographic PIV systems, respectively, and were analysed via proper orthogonal decomposition. For the 2D PIV, the spatial resolution was sufficient to resolve most of the turbulent kinetic energy of the turbulent flow. The resolution in the case of tomographic PIV was lower, but the 3D instantaneous velocity fields unambiguously revealing that the global mode corresponds to a spiralling structure, counter-winded to the direction of the jet swirl.
UR - http://www.scopus.com/inward/record.url?scp=84978938066&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84978938066&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-30602-5_6
DO - 10.1007/978-3-319-30602-5_6
M3 - Conference contribution
AN - SCOPUS:84978938066
SN - 9783319306001
T3 - Springer Proceedings in Physics
SP - 43
EP - 50
BT - Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF 2015
A2 - Segalini, Antonio
PB - Springer Science and Business Media, LLC
T2 - 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015
Y2 - 15 June 2015 through 18 June 2015
ER -