118 citations · 294 across the 11 of their papers we have counts for
12 papers · 1 filter
(Why) Jets quantise trapped acoustic modes
Brandon Yeung, Michael N. Stavropoulos, Vincent Jaunet +2
High-subsonic turbulent jets trap acoustic modes in their potential core. The modes lie in narrow frequency bands that are -wide in Strouhal number, . By studying a Mac…
Plane-marching PSE wavepacket models for perfectly-expanded twin jets
Iván Padilla-Montero, Daniel Rodríguez, Vincent Jaunet +1
The importance of wavepackets in the generation of mixing noise in twin jets is expected by extrapolation of the insights previously obtained from the study of single isolated jets…
Eduction of acoustics-related coherent structures from Schlieren images of supersonic twin jets by coupling Doak's decomposition and SPOD
Iván Padilla-Montero, Daniel Rodríguez, Vincent Jaunet +1
This work proposes a methodology to improve the extraction of coherent structures associated with the generation of acoustic fluctuations in turbulent jets from high-speed Schliere…
Reflection and transmission of a Kelvin-Helmholtz wave incident on a shock in a jet
Matteo Mancinelli, Eduardo Martini, Vincent Jaunet +3
Screech tones in supersonic jets are underpinned by resonance between downstream-travelling Kelvin-Helmholtz waves and upstream-travelling acoustic waves. Specifically, recent work…
Closure mechanism of the A1 and A2 modes in jet screech
Petrônio A. S. Nogueira, Vincent Jaunet, Matteo Mancinelli +2
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 scree…
Absolute instability in shock-containing jets
Petrônio A. S. Nogueira, Peter Jordan, Vincent Jaunet +3
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 me…
Including acoustic modes in the vortex-sheet eigenbasis of a jet
Matteo Mancinelli, Eduardo Martini, Vincent Jaunet +1
Vortex-sheet models of jets are widely used to describe the dynamics of modes, such as the Kelvin-Helmholtz instability and guided acoustic waves. However, it is seldom pointed out…
A complex-valued resonance model for axisymmetric screech tones in supersonic jets
Matteo Mancinelli, Vincent Jaunet, Peter Jordan +1
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 by \cit…
Waves in screeching jets
Daniel Edgington-Mitchell, Tianye Wang, Petronio Nogueira +5
The interaction between various wavelike structures in screeching jets is considered via both experimental measurements and linear stability theory. Velocity snapshots of screechin…
Jet resonance in truncated ideally contoured nozzle
Florian Bakulu, Guillaume Lehnasch, Vincent Jaunet +2
An overexpanded jet in a truncated ideally contoured nozzle is found to feature a tonal behavior. The flow field is investigated to understand its origin and show how it modifies s…
Resolvent-based modelling of coherent wavepackets in a turbulent jet
Lutz Lesshafft, Onofrio Semeraro, Vincent Jaunet +2
Coherent turbulent wave-packet structures in a jet at Reynolds number 460000 and Mach number 0.4 are extracted from experimental measurements and are modeled as linear fluctuations…
Jet-edge interaction tones
Peter Jordan, Vincent Jaunet, Aaron Towne +4
Motivated by the problem of jet-flap interaction noise, we study the tonal dynamics that occur when a sharp edge is placed in the hydrodynamic nearfield of an isothermal turbulent…