Wave-packet models for jet dynamics and sound radiation
AVG Cavalieri, P Jordan… - Applied …, 2019 - asmedigitalcollection.asme.org
Organized structures in turbulent jets can be modeled as wavepackets. These are
characterized by spatial amplification and decay, both of which are related to stability …
characterized by spatial amplification and decay, both of which are related to stability …
Importance of the nozzle-exit boundary-layer state in subsonic turbulent jets
To investigate the effects of the nozzle-exit conditions on jet flow and sound fields, large-
eddy simulations of an isothermal Mach 0.9 jet issued from a convergent-straight nozzle are …
eddy simulations of an isothermal Mach 0.9 jet issued from a convergent-straight nozzle are …
Formation and flame-induced suppression of the precessing vortex core in a swirl combustor: experiments and linear stability analysis
K Oberleithner, M Stöhr, SH Im, CM Arndt… - Combustion and …, 2015 - Elsevier
The precessing vortex core (PVC) is a coherent flow structure that is often encountered in
swirling flows in gas turbine (GT) combustors. In some swirl combustors, it has been …
swirling flows in gas turbine (GT) combustors. In some swirl combustors, it has been …
Acoustic resonance in the potential core of subsonic jets
The purpose of this paper is to characterize and model waves that are observed within the
potential core of subsonic jets and relate them to previously observed tones in the near …
potential core of subsonic jets and relate them to previously observed tones in the near …
Instability wave models for the near-field fluctuations of turbulent jets
K Gudmundsson, T Colonius - Journal of Fluid Mechanics, 2011 - cambridge.org
Previous work has shown that aspects of the evolution of large-scale structures, particularly
in forced and transitional mixing layers and jets, can be described by linear and nonlinear …
in forced and transitional mixing layers and jets, can be described by linear and nonlinear …
Resolvent-based modeling of coherent wave packets in a turbulent jet
Coherent turbulent wave-packet structures in a jet at Reynolds number 460 000 and Mach
number 0.4 are extracted from experimental measurements and are modeled as linear …
number 0.4 are extracted from experimental measurements and are modeled as linear …
Closure mechanism of the A1 and A2 modes in jet screech
This paper explores the screech closure mechanism for different axisymmetric modes in
shock-containing jets. While many of the discontinuities in tonal frequency exhibited by …
shock-containing jets. While many of the discontinuities in tonal frequency exhibited by …
Large-scale streaky structures in turbulent jets
Streaks have been found to be an important part of wall-turbulence dynamics. In this paper,
we extend the analysis for unbounded shear flows, in particular a Mach 0.4 round jet, using …
we extend the analysis for unbounded shear flows, in particular a Mach 0.4 round jet, using …
A complex-valued resonance model for axisymmetric screech tones in supersonic jets
We model the resonance mechanism underpinning generation of A1 and A2 screech tones
in an under-expanded supersonic jet. Starting from the resonance model recently proposed …
in an under-expanded supersonic jet. Starting from the resonance model recently proposed …
Absolute instability in shock-containing jets
We present an analysis of the linear stability characteristics of shock-containing jets. The
flow is linearised around a spatially periodic mean, which acts as a surrogate for a mean …
flow is linearised around a spatially periodic mean, which acts as a surrogate for a mean …