On the impact of swirl on the growth of coherent structures

K Oberleithner, CO Paschereit… - Journal of Fluid …, 2014 - cambridge.org
Spatial linear stability analysis is applied to the mean flow of a turbulent swirling jet at swirl
intensities below the onset of vortex breakdown. The aim of this work is to predict the …

Three-dimensional laser-Doppler velocimeter measurements in swirling turbulent pipe flow

G Rocklage-Marliani, M Schmidts… - Flow, Turbulence and …, 2003 - Springer
The present work is an experimental study of the evolutioncharacteristics of swirl in the flow
in a pipe at a moderately highReynolds number and over a wide range of swirl numbers …

Development of boundary conditions for direct numerical simulations of three-dimensional vortex breakdown phenomena in semi-infinite domains

MR Ruith, P Chen, E Meiburg - Computers & Fluids, 2004 - Elsevier
The suitability of various open boundary conditions is evaluated for direct numerical
simulations of three-dimensional, incompressible, spatially and temporally evolving, swirling …

An experimental study of the near-field mixing characteristics of a swirling jet

R Örlü, PH Alfredsson - Flow, Turbulence and Combustion, 2008 - Springer
The present experimental investigation is devoted to the mixing characteristics of a passive
scalar in the near-field region of a moderately swirling jet issuing from a fully developed …

Dynamics and mixing in jet/vortex interactions

R Paoli, F Laporte, B Cuenot, T Poinsot - Physics of fluids, 2003 - pubs.aip.org
This study describes large eddy simulations of the interaction between an exhaust jet and a
trailing vortex, in the near-field of an aircraft wake. Two cases are analyzed: in the first one …

A study on axially rotating pipe and swirling jet flows

L Facciolo - 2006 - diva-portal.org
The present study is an experimental and numerical investigation on rotating flows. A
special facility has been built in order to produce a turbulent swirling jet generated by a fully …

Vortex ring with swirl: A numerical study

M Cheng, J Lou, TT Lim - Physics of Fluids, 2010 - pubs.aip.org
In this paper, we use a lattice Boltzmann method to study the effect of swirl on the dynamics
of an isolated three-dimensional vortex ring in a viscous incompressible fluid. We focus on a …

Nonlinear evolution of a swirling jet instability

I Delbende, M Rossi - Physics of Fluids, 2005 - pubs.aip.org
The nonlinear evolution of the three-dimensional instability of a viscous unsteady swirling
jet, namely, the Batchelor vortex, is addressed. Two types of initial perturbations are …

Swirling instability of viscous liquid jets with axial shear effect in gas surroundings

Y Xu, K Mu, Y **n, R Qiao, C Zhao, T Si - Journal of Fluid Mechanics, 2024 - cambridge.org
Linear instability analysis of a viscous swirling liquid jet surrounded by ambient gas is
carried out by considering the significant influence of axial shear effect. The jet azimuthal …

[PDF][PDF] On turbulent swirling jets: Vortex breakdown, coherent structures, and their control

K Oberleithner - 2012 - researchgate.net
This thesis provides an experimental and theoretical investigation of turbulent swirling jets
with the emphasis on the formation of large-scale coherent flow structures. The involved …