Turbomachinery noise predictions: present and future

S Moreau - Acoustics, 2019 - mdpi.com
In future Ultra-High By-Pass Ratio turboengines, the turbomachinery noise (fan and turbine
stages mainly) is expected to increase significantly. A review of analytical models and …

Large-eddy simulations of self-excited thermoacoustic instability in a premixed swirling combustor with an outlet nozzle

Y Sun, D Zhao, C Ji, T Zhu, Z Rao, B Wang - Physics of Fluids, 2022 - pubs.aip.org
Reducing the footprint of greenhouse gases and nitrogen oxides (NOx) emissions from
combustion systems means that they have been operating under lean or ultra-lean fuel–air …

Characterizing hydrogen-fuelled pulsating combustion on thermodynamic properties of a combustor

D Zhao, Y Guan, A Reinecke - Communications Physics, 2019 - nature.com
Unlike hydrocarbon fuel, hydrogen is 'green'and attracting more and more attentions in
energy and propulsion sectors due to the zero emission of CO and CO2. By applying …

Low-order modeling of can-annular combustors

GJJ Fournier, M Meindl, CF Silva… - … for Gas Turbines …, 2021 - asmedigitalcollection.asme.org
Heavy-duty land-based gas turbines are often designed with can-annular combustors, which
consist of a set of identical cans, acoustically connected on the upstream side via the …

Thermoacoustics of can-annular combustors

G Ghirardo, C Di Giovine… - … of Engineering for …, 2019 - asmedigitalcollection.asme.org
Can-annular combustors consist of a set of independent cans, connected on the upstream
side to the combustor plenum and on the downstream side to the turbine inlet, where a …

Autoignition flame dynamics in sequential combustors

O Schulz, N Noiray - Combustion and Flame, 2018 - Elsevier
This numerical study investigates the linear and non-linear flame dynamics in the second
stage of a sequential combustor, with methane fuel injection into vitiated hot gas. It focuses …

Multispecies flow indirect-noise modeling re-examined with a helicopter-engine application

Y Gentil, G Daviller, S Moreau, T Poinsot - AIAA Journal, 2024 - arc.aiaa.org
Composition noise has recently received increasing attention for its potential to contribute
significantly to the indirect noise mechanism. In this study, the importance and definition of …

Low-order modeling to investigate clusters of intrinsic thermoacoustic modes in annular combustors

GJJ Fournier, M Haeringer… - … of Engineering for …, 2021 - asmedigitalcollection.asme.org
The intrinsic thermoacoustic (ITA) feedbackloop constitutes a coupling between flow, flame
and acoustics that does not involve the natural acoustic modes of the system. One recent …

[HTML][HTML] Theoretical model of azimuthal combustion instability subject to non-trivial boundary conditions

QIN Lei, W Xiaoyu, G Zhang, SUN Xiaofeng - Chinese Journal of …, 2024 - Elsevier
The problem of evaluating the sensitivity of non-trivial boundary conditions to the onset of
azimuthal combustion instability is a longstanding challenge in the development process of …

Pressurized infusion: A new and improved liquid composite molding process

M Akif Yalcinkaya, GE Guloglu… - Journal of …, 2019 - asmedigitalcollection.asme.org
Vacuum-assisted resin transfer molding (VARTM) has several inherent shortcomings such
as long mold filling times, low fiber volume fraction, and high void content in fabricated …