TY - JOUR

T1 - Large-eddy simulations of the near field of a turbulent annular jet

AU - Ryzhenkov, V.

AU - Mullyadzhanov, R.

PY - 2017/9/27

Y1 - 2017/9/27

N2 - Using high-order spectral element method and large eddy simulations we study a turbulent annular jet at the Reynolds number of 8900, based on the bulk velocity in the annular channel and its half-width. The region of high turbulent kinetic energy is located inside the recirculation zone behind the bluff-body where the low-frequency motion is known to occur which is detected with energy spectra. Further analysis includes the azimuthal Fourier and Proper orthogonal decomposition (POD). It is shown that the main eigenmodes with low azimuthal wavenumbers m rotate around the symmetry axis in both directions providing the explanation for the precessing motion of the recirculating zone.

AB - Using high-order spectral element method and large eddy simulations we study a turbulent annular jet at the Reynolds number of 8900, based on the bulk velocity in the annular channel and its half-width. The region of high turbulent kinetic energy is located inside the recirculation zone behind the bluff-body where the low-frequency motion is known to occur which is detected with energy spectra. Further analysis includes the azimuthal Fourier and Proper orthogonal decomposition (POD). It is shown that the main eigenmodes with low azimuthal wavenumbers m rotate around the symmetry axis in both directions providing the explanation for the precessing motion of the recirculating zone.

KW - FLOW

KW - WAKE

UR - http://www.scopus.com/inward/record.url?scp=85034042464&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/899/2/022014

DO - 10.1088/1742-6596/899/2/022014

M3 - Article

AN - SCOPUS:85034042464

VL - 899

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 2

M1 - 022014

ER -