On the application of wavelet transform in jet aeroacoustics

R Camussi, S Meloni - Fluids, 2021 - mdpi.com
Wavelet transform has become a common tool for processing non-stationary signals in many
different fields. The present paper reports a review of some applications of wavelet in …

[HTML][HTML] Effect of H2 addition on the local extinction, flame structure, and flow field hydrodynamics in non-premixed bluff body stabilized flames

K Rajamanickam, F Lefebvre, C Gobin, G Godard… - Physics of …, 2023 - pubs.aip.org
We examined the effect of hydrogen (H2) enrichment on the primary fuel methane (CH4) in a
canonical non-premixed bluff-body stabilized burner operating under typical central jet …

Influence of operating conditions on flow field dynamics and soot formation in an aero-engine model combustor

M Grader, P Gerlinger - Combustion and Flame, 2023 - Elsevier
Large-eddy simulations of a sooting aero-engine model combustor are performed for three
operating points. They are analyzed to investigate the influence of secondary air injection …

Wavelet-based multiresolution analysis of cavitation-induced loading instabilities under phase effect in a waterjet pump

G Zhao, L Cao, R Wu, N Liang, D Wu - Ocean Engineering, 2021 - Elsevier
As observed experimentally and numerically, the blade cavitation in a waterjet pump
presents multi-temporal-spatial scales under the inlet guide vanes (IGVs) wake …

A refined modal decomposition method for cavitating flow based on state recognition

Z Wang, H Han, W Zhao, G Zhang, Y Jiang - Ocean Engineering, 2024 - Elsevier
Modal decomposition is a data-driven method widely used in fluid mechanics to extract
energy and dynamically significant features of fluid flow. However, traditional modal …

Mean field coupling mechanisms explaining the impact of the precessing vortex core on the flame transfer function

F Lückoff, TL Kaiser, CO Paschereit… - Combustion and …, 2021 - Elsevier
The flame transfer functions (FTF) is a key quantity to assess the thermoacoustic properties
of combustion systems. It is known to depend on the hydrodynamic instabilities of the …

Impact of a centerbody on the unsteady flow dynamics of a swirl nozzle: Intermittency of precessing vortex core oscillations

S Gupta, S Shanbhogue… - … for Gas Turbines …, 2022 - asmedigitalcollection.asme.org
The precessing vortex core (PVC) is a self-excited flow oscillation state occurring in swirl
nozzles. This is caused by the presence of a marginally unstable hydrodynamic helical …

Impact of Hydrogen Addition on the Thermoacoustic Instability and Precessing Vortex Core Dynamics in a CH4/H2/Air Technically Premixed Combustor

A Datta, S Gupta, I Chterev… - … of Engineering for …, 2022 - asmedigitalcollection.asme.org
We study the impact of H 2 enrichment on the unsteady flow dynamics and thermoacoustic
instability in the prediction and control of instabilities in industrial turbines (PRECCINSTA) …

Numerical investigation of combustion instabilities in swirling flames with hydrogen enrichment

Y Gong, D Fredrich, AJ Marquis, WP Jones - Flow, Turbulence and …, 2023 - Springer
This work presents a numerical study on technically premixed, swirl-stabilised flames in the
PRECCINSTA model combustor. The employed method, BOFFIN-LES, comprises a fully …

Effect of Reynolds number on the coherent structure and dynamics of vortex in double-stage counter-rotating swirling flows

C Liu, J Yang, Q Dong, C Lai, J Zhao, J Lin, M Liu - Physics of Fluids, 2024 - pubs.aip.org
In this paper, the isothermal swirling flow in a combustion chamber equipped with a double-
stage swirler is studied by a combination of experiments and numerical simulations at the …