Analysis of Coherent Structures in Circular and Chevron Jets
https://doi.org/10.25205/2541-9447-2018-13-4-46-59
Abstract
The present study reports on measurements of the spatial shape and dynamics of large-scale coherent structures in circular and chevron submerged jets by the volumetric particle image velocimetry technique. A tomographic PIV system was used for the measurements of 3D velocity fields with 2 kHz acquisition rate. The datasets of PIV velocity fields were analyzed by spatial Fourier transform over the azimuthal angle and proper orthogonal decomposition (POD). It was concluded that for the chevron jet the turbulent kinetic energy of the axisymmetric mode m = 0, related with ring-like vortices in mixing layer of the jet, was more than twice smaller in comparison with the jet from a circular nozzle.
About the Authors
S. S. Abdurakipov
Institute of Thermophysics SB RAS; Novosibirsk State University Novosibirsk
Russian Federation
Russian Federation
V. M. Dulin
Institute of Thermophysics SB RAS; Novosibirsk State University Novosibirsk
Russian Federation
Russian Federation
M. P. Tokarev
Institute of Thermophysics SB RAS; Novosibirsk State University Novosibirsk
Russian Federation
Russian Federation
D. M. Markovich
Institute of Thermophysics SB RAS; Novosibirsk State University Novosibirsk
Russian Federation
Russian Federation
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Review
For citations:
Abdurakipov S.S., Dulin V.M., Tokarev M.P., Markovich D.M. Analysis of Coherent Structures in Circular and Chevron Jets. SIBERIAN JOURNAL OF PHYSICS. 2018;13(4):46-59. (In Russ.) https://doi.org/10.25205/2541-9447-2018-13-4-46-59
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