Optimum structure of a laval nozzle for an abrasive air jet based on nozzle pressure ratio

Y Liu, J Zhang, J Wei, X Liu - Powder Technology, 2020 - Elsevier
The effect of nozzle pressure ratio n on the flow field of an air jet was investigated to obtain
the basis of nozzle design. The flow field structure and abrasive acceleration of these …

Modal and transient dynamics of jet flows

X Garnaud, L Lesshafft, PJ Schmid, P Huerre - Physics of Fluids, 2013 - pubs.aip.org
The linear stability dynamics of incompressible and compressible isothermal jets are
investigated by means of their optimal initial perturbations and of their temporal …

Global stability of buoyant jets and plumes

RVK Chakravarthy, L Lesshafft… - Journal of Fluid …, 2018 - cambridge.org
The linear global stability of laminar buoyant jets and plumes is investigated under the low-
Mach-number approximation. For Richardson numbers in the range (plume) regimes. A …

Numerical simulation of free jets

A Boguslawski, A Tyliszczak, A Wawrzak… - International Journal of …, 2017 - emerald.com
Purpose The purpose of the paper is to summarize recent achievements and suggest further
research directions in numerical studies of round free jets with particular attention on the …

Global instability of low-density jets

W Coenen, L Lesshafft, X Garnaud… - Journal of Fluid …, 2017 - cambridge.org
The global stability of laminar axisymmetric low-density jets is investigated in the low Mach
number approximation. The linear modal dynamics is found to be characterised by two …

Local linear stability of plumes generated along vertical heated cylinders in stratified environments

Z Yu, GR Hunt - Journal of Fluid Mechanics, 2023 - cambridge.org
The linear temporal and absolute/convective stability characteristics of a thermal plume
generated along a heated vertical cylinder are investigated theoretically under the …

Control of a high Reynolds number Mach 0.9 heated jet using plasma actuators

M Kearney-Fischer, JH Kim, M Samimy - Physics of Fluids, 2009 - pubs.aip.org
The results of particle image velocimetry (PIV) measurements in a high subsonic, heated, jet
forced using localized arc filament plasma actuators (LAFPAs) show that LAFPAs can …

Onset of global instability in low-density jets

Y Zhu, V Gupta, LKB Li - Journal of Fluid Mechanics, 2017 - cambridge.org
In low-density axisymmetric jets, the onset of global instability is known to depend on three
control parameters, namely the jet-to-ambient density ratio. This scaling, which is insensitive …

Optimal velocity and density profiles for the onset of absolute instability in jets

L Lesshafft, O Marquet - Journal of Fluid Mechanics, 2010 - cambridge.org
The absolute/convective character of the linear instability of axisymmetric jets is investigated
for a wide range of parallel velocity and density profiles. An adjoint-based sensitivity …

Diffusion-flame flickering as a hydrodynamic global mode

D Moreno-Boza, W Coenen, A Sevilla… - Journal of Fluid …, 2016 - cambridge.org
The present study employs a linear global stability analysis to investigate buoyancy-induced
flickering of axisymmetric laminar jet diffusion flames as a hydrodynamic global mode. The …