Results 91 to 100 of about 108,068 (160)

A hybrid CFD-neural network framework for the early prediction of longitudinal thermo-acoustic instabilities in hydrogen-fueled gas turbine combustors

Next Energy
This study introduces a hybrid Computational Fluid Dynamics–Neural Network (CFD–NN) framework for real-time prediction of longitudinal thermo-acoustic instabilities in hydrogen-fueled gas turbine combustors—critical for future clean energy systems.
Oyinbonogha Fred Agonga, Norazila Othman, Mohd Fairus Mohd Yasin   +2 more
doaj   +1 more source

Acoustic and Large Eddy Simulation studies of azimuthal modes in annular combustion chambers [PDF]

, 2012
The objectives of this paper are the description of azimuthal instability modes found in annular combus- tion chambers using two numerical tools: (1) Large Eddy Simulation (LES) methods and (2) acoustic solv- ers.
Wolf, Pierre, Staffelbach, Gabriel, Müller, Jens-Dominik, Gicquel, Laurent Y.M., Poinsot, Thierry   +4 more
core   +1 more source

Experimental Study of a Transcritical Thermoacoustic Device [PDF]

, 2018
A prototype transcritical thermoacoustic engine has been constructed and tested, yielding thermoacoustic results. Three different thermoacoustic “stack” designs have been evaluated in the present study.
Alexander, Dayle N.
core   +1 more source

Influence of equivalence ratio and hydrogen addition on thermoacoustic instabilities in premixed methane and propane flames in vertical tubes

Case Studies in Thermal Engineering
This research examines the behavior of premixed flames within a vertical tube, considering both an open and a closed end configuration. The study utilizes a pilot flame as the ignition source.
Abdullah M.A. Alsharif, Robert Woolley
doaj   +1 more source

Modelling of Thermoacoustic Combustion Instabilities Phenomena: Application to an Experimental Test Rig [PDF]

, 2014
Lean premixed combustion chambers fuelled by natural gas and used in modern gas turbines for power generation are often affected by combustion instabilities generated by mutual interactions between pressure fluctuations and heat oscillations produced by ...
Edoardo Bertolotto, Giovanni Campa, Sergio Rizzo, Alessandro Saponaro, Federico Bonzani, Davide Laera, Camporeale, Sergio Mario, Antonio Ferrante   +7 more
core   +1 more source

Coupling-induced instability in a ring of thermoacoustic oscillators. [PDF]

Proc Math Phys Eng Sci, 2022
Pedergnana T, Noiray N.
europepmc   +1 more source

Nonlinear analysis of thermoacoustic instabilities

, 2011
Thermoacoustic instabilities are prevalent in many practical combustion systems. They occur when fluctuations in pressure and heat release are in phase and can lead to catastrophic combustor damage.
Noble, Andrew C
core   +1 more source

Benchmarking machine learning models against full-scale acoustic absorption measurements in gas turbine liners

Fuel Communications
Accurate prediction of acoustic energy absorption in gas turbine combustors is critical for enhancing performance, mitigating thermoacoustic instabilities, and reducing emissions.
Abdullah Shahjalal, Roy Kalawsky, Demetrios Joannou, Faruk Ozdemir   +3 more
doaj   +1 more source

Preventing a global transition to thermoacoustic instability by targeting local dynamics. [PDF]

Sci Rep, 2022
George NB, Raghunathan M, Unni VR, Sujith RI, Kurths J, Surovyatkina E.   +5 more
europepmc   +1 more source

Thermoacoustic Instabilities in an Annular Rijke Tube

, 2010
Thermoacoustic instabilities are a major concern in the design of gas turbine combustors. Most modern combustion chambers have an annular shape with multiple circumferentially arranged burners and, accordingly, suffer often from azimuthal instability ...
Jonas P. Moeck, Christian Oliver Paschereit, Markus Paul   +2 more
core   +1 more source