Wavepackets in the velocity field of turbulent jets
We study the velocity fields of unforced, high Reynolds number, subsonic jets, issuing from
round nozzles with turbulent boundary layers. The objective of the study is to educe …
round nozzles with turbulent boundary layers. The objective of the study is to educe …
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 …
Wavepacket models for supersonic jet noise
Gudmundsson and Colonius (J. Fluid Mech., vol. 689, 2011, pp. 97–128) have recently
shown that the average evolution of low-frequency, low-azimuthal modal large-scale …
shown that the average evolution of low-frequency, low-azimuthal modal large-scale …
Scattering of turbulent-jet wavepackets by a swept trailing edge
Installed jet noise is studied by means of a simplified configuration comprising a flat plate in
the vicinity of a round jet. The effects of Mach number, jet-plate radial distance, and trailing …
the vicinity of a round jet. The effects of Mach number, jet-plate radial distance, and trailing …
Sensitivity of wavepackets in jets to nonlinear effects: the role of the critical layer
Linear instability waves, or wavepackets, are key building blocks for the jet-noise problem. It
has been shown in previous work that linear models correctly predict the evolution of …
has been shown in previous work that linear models correctly predict the evolution of …
Study of ultrasonic near-field region in ultrasonic liquid-level monitoring system
W Gao, W Liu, Y Hu, J Wang - Micromachines, 2020 - mdpi.com
In the method of monitoring the liquid level based on ultrasonic impedance, the near-field
effect can seriously affect the validity of the results. In this paper, we explore the factors …
effect can seriously affect the validity of the results. In this paper, we explore the factors …
Coherence decay and its impact on sound radiation by wavepackets
AVG Cavalieri, A Agarwal - Journal of Fluid Mechanics, 2014 - cambridge.org
Wavepackets obtained by a linear stability analysis of the turbulent mean flow were shown
in recent works to agree closely with some relevant statistics of turbulent jets, such as power …
in recent works to agree closely with some relevant statistics of turbulent jets, such as power …
Jet-installation noise and near-field characteristics of jet–surface interaction
L Rego, F Avallone, D Ragni… - Journal of Fluid …, 2020 - cambridge.org
The link between jet-installation noise and the near-field flow features of the corresponding
isolated jet is studied by means of lattice-Boltzmann numerical simulations. The …
isolated jet is studied by means of lattice-Boltzmann numerical simulations. The …
Two-point coherence of wave packets in turbulent jets
An experiment has been performed in order to provide support for wave-packet jet-noise
modeling efforts. Recent work has shown that the nonlinear effects responsible for the two …
modeling efforts. Recent work has shown that the nonlinear effects responsible for the two …
Real-time modelling of wavepackets in turbulent jets
K Sasaki, S Piantanida, AVG Cavalieri… - Journal of Fluid …, 2017 - cambridge.org
Three methods are considered for estimating the downstream evolution of wavepackets in
turbulent jets based on upstream measurements. The parabolised stability equations are …
turbulent jets based on upstream measurements. The parabolised stability equations are …