Results 21 to 30 of about 27,111 (282)

3D convolutional selective autoencoder for instability detection in combustion systems

Energy and AI, 2021
While analytical solutions of critical (phase) transitions in dynamical systems are abundant for simple nonlinear systems, such analysis remains intractable for real-life dynamical systems. A key example is thermoacoustic instability in combustion, where
Tryambak Gangopadhyay, Vikram Ramanan, Adedotun Akintayo, Paige K Boor, Soumalya Sarkar, Satyanarayanan R Chakravarthy, Soumik Sarkar   +6 more
doaj   +1 more source

Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry

Aerospace, 2019
With the goal of assessing the capability of Computational Fluid Dynamics (CFD) to simulate combustion instabilities, the present work considers a premixed, bluff-body-stabilized combustor with well-defined inlet and outlet boundary conditions.
Esteban Gonzalez-Juez
doaj   +1 more source

Dynamics of Thermoacoustic Oscillations in Swirl Stabilized Combustor without and with Porous Inert Media

Journal of Combustion, 2022
Lean premixed (LPM) combustion processes are of increased interest to the gas turbine industry due to their reduction in harmful emissions. These processes are susceptible to thermoacoustic instabilities, which are produced when energy added by an in ...
Cody Dowd, Joseph Meadows
doaj   +1 more source

Impact of local secondary gas addition on the dynamics of self-excited ethylene flames

International Journal of Thermofluids, 2021
Advanced combustion strategies for gas turbine applications, such as lean burn operation, have been shown to be effective in reducing NOx emissions and increasing fuel efficiency.
Taaha Hussain, Midhat Talibi, Ramanarayanan Balachandran   +2 more
doaj   +1 more source

Modeling for Active Control of Combustion and Thermally Driven Oscillations [PDF]

, 1991
Organized oscillations excited and sustained by high densities of energy release in combustion chambers have long caused serious problems in development of propulsion systems.
Culick, F. E. C., Jahnke, C. C., Lin, W. H., Sterling, J. D.   +3 more
core   +1 more source

Large Eddy Simulation of combustion instabilities in a lean partially premixed swirled flame [PDF]

, 2012
This paper investigates one issue related to Large Eddy Simulations (LES) of self- excited combustion instabilities in gas-fueled swirled burners: the effects of incom- plete mixing between the gas injection and the combustion chamber.
Albouze, Angelberger, Benedetta Franzelli, Bilger, Boudier, Colin, Colin, di Mare, Eleonore Riber, Fiorina, Franzelli, Freitag, Galpin, Giauque, Granet, Kaufmann, Laurent Y.M. Gicquel, Lieuwen, Meier, Moureau, Moureau, Poinsot, Poinsot, Roux, Roux, Schmitt, Selle, Selle, Sengissen, Sengissen, Shreekrishna, Sommerer, Thierry Poinsot, Truffin, Westbrook, Williams, Wolf   +36 more
core   +3 more sources

Combined Optic-Acoustic Monitoring of Combustion in a Gas Turbine

International Journal of Turbomachinery, Propulsion and Power, 2020
The need for better combustion monitoring in gas turbines has become more acute with the latest technical requirements, standards, and policies in terms of safety, environment, efficiency, operation flexibility, and operation costs.
Fabrice Giuliani, Lukas Andracher, Vanessa Moosbrugger, Nina Paulitsch, Andrea Hofer   +4 more
doaj   +1 more source

Non-linear simulations of combustion instabilities with a quasi-1D Navier-Stokes code

, 2010
As lean premixed combustion systems are more susceptible to combustion instabilities than non-premixed systems, there is an increasing demand for improved numerical design tools that can predict the occurrence of combustion instabilities with high ...
Allam, Annaswamy, Baillot, Bell, Boyer, Candel, Cohen, Culick, Culick, Davies, Disselhorst, Ditaranto, Dowling, Ducruix, Fichera, Fleifil, Keller, Levine, McManus, Nils Erland L. Haugen, Peters, Poinsot, Polifke, Polifke, Prasad, Rayleigh, Schuller, Sigurd Sannan, White, Øyvind Langørgen   +29 more
core   +1 more source

Measurement and Modeling of the Acoustic Response in a High Pressure Combustor [PDF]

, 2011
In this paper, a one dimensional acoustic network model is presented which can be used as a design tool to predict the limit cycle pressure oscillations in a gas turbine combustor. Analytically represented models are combined with measured flame transfer
Alemela, P.R., Kapucu, M., Kapucu, Mehmet, Kok, Jacobus B.W., Pozarlik, Artur Krzysztof   +4 more
core   +7 more sources

Electrically Driven Supersonic Combustion

Energies, 2018
This manuscript reviews published works related to plasma assistance in supersonic combustion; focusing on mixing enhancement, ignition and flameholding. A special attention is paid for studies, which the author participated in person.
Sergey B. Leonov
doaj   +1 more source