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Artykuły w czasopismach na temat "Instabilités de front de flamme"
Ayoobi, Mohsen, i Ingmar Schoegl. "Numerical analysis of flame instabilities in narrow channels: Laminar premixed methane/air combustion". International Journal of Spray and Combustion Dynamics 9, nr 3 (5.06.2017): 155–71. http://dx.doi.org/10.1177/1756827717706009.
Pełny tekst źródłaXia, Yongfang, Tingyong Fang, Haitao Wang, Erbao Guo i Jinwei Ma. "Numerical investigation of low-velocity filtration combustion instability based on the initial preheating non-uniformity". E3S Web of Conferences 136 (2019): 02040. http://dx.doi.org/10.1051/e3sconf/201913602040.
Pełny tekst źródłaYang, Sheng, Abhishek Saha, Zirui Liu i Chung K. Law. "Role of Darrieus–Landau instability in propagation of expanding turbulent flames". Journal of Fluid Mechanics 850 (10.07.2018): 784–802. http://dx.doi.org/10.1017/jfm.2018.426.
Pełny tekst źródłaPalies, Paul, Milos Ilak i Robert Cheng. "Transient and limit cycle combustion dynamics analysis of turbulent premixed swirling flames". Journal of Fluid Mechanics 830 (5.10.2017): 681–707. http://dx.doi.org/10.1017/jfm.2017.575.
Pełny tekst źródłaYu, Rixin. "Deep learning of nonlinear flame fronts development due to Darrieus–Landau instability". APL Machine Learning 1, nr 2 (1.06.2023): 026106. http://dx.doi.org/10.1063/5.0139857.
Pełny tekst źródłaJOULIN, GUY, HAZEM EL-RABII i KIRILI A. KAZAKOV. "On-shell description of unsteady flames". Journal of Fluid Mechanics 608 (11.07.2008): 217–42. http://dx.doi.org/10.1017/s0022112008002140.
Pełny tekst źródłaHicks, E. P. "A shear instability mechanism for the pulsations of Rayleigh–Taylor unstable model flames". Journal of Fluid Mechanics 748 (6.05.2014): 618–40. http://dx.doi.org/10.1017/jfm.2014.198.
Pełny tekst źródłaAltantzis, C., C. E. Frouzakis, A. G. Tomboulides, M. Matalon i K. Boulouchos. "Hydrodynamic and thermodiffusive instability effects on the evolution of laminar planar lean premixed hydrogen flames". Journal of Fluid Mechanics 700 (18.05.2012): 329–61. http://dx.doi.org/10.1017/jfm.2012.136.
Pełny tekst źródłaJiang, Xiaozhen, Jingxuan Li i Lijun Yang. "Nonlinear response of laminar premixed flames to dual-input harmonic disturbances". INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, nr 4 (1.02.2023): 3408–19. http://dx.doi.org/10.3397/in_2022_0484.
Pełny tekst źródłaMokrin, Sergey, R. V. Fursenko i S. S. Minaev. "Thermal-Diffusive Stability of Counterflow Premixed Flames at Low Lewis Numbers". Advanced Materials Research 1040 (wrzesień 2014): 608–13. http://dx.doi.org/10.4028/www.scientific.net/amr.1040.608.
Pełny tekst źródłaRozprawy doktorskie na temat "Instabilités de front de flamme"
Hok, Jean-Jacques. "Stratégie de modélisation pour la simulation aux grandes échelles d'explosions de mélanges hydrogène-air pauvres". Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSEP065.
Pełny tekst źródłaThe climate crisis the world faces today calls for immediate actions to curb down carbon emissions. In particular, a rapid energy transition towards cleaner sources is necessary. Among many candidates, hydrogen stands out as a carbon-free energy vector. However, its storage and transport in big quantities raise safety concerns. Following a leakage, mixed with the surrounding air, this hydrogen can form a highly flammable mixture. In case of accidental ignition of this mixture, different combustion scenarios and regimes are possible, depending on factors such as geometry (dimensions, confinement, presence of obstacles), mixture composition, temperature, pressure or turbulence level. These regimes range from slow deflagration to the transition to detonation in the worst case. To predict the damage induced by an explosion, Computational Fluid Dynamics has the advantage of being safer than experiments and gives access to quantities hard or impossible to measure empirically. This thesis deals with the prediction of lean hydrogen-air explosions using Large-Eddy Simulation (LES). Lean H2-air mixtures are known for their distinctive sub-unity Lewis number, which characterises an unbalance between molecular and heat diffusion processes with major consequences: (1) lean H2-air flames are strongly sensitive to stretch; (2) they are prone to develop flame front cells due to the thermo-diffusive instability. Both constitute accelerating mechanisms which impact the overpressure generated during the explosion. In this work, we show that the Thickened Flame (TF) approach to simulate sub-unity Lewis number flames: (1) induces an amplification of stretch on the flame; (2) combined with the low grid resolution in LES, filters out flame front instabilities. The coupling of these undesired mechanisms can generate an erroneous flame propagation which questions the predictability of LES for lean H2-air explosions. In this thesis, a modelling strategy is proposed to reliably and accurately predict lean hydrogen-air explosions. A new paradigm is considered to separately correct the amplification of stretch effects and model subgrid phenomena due to the thermo-diffusive instability. These two corrections are first developed on canonical configurations and then extended and validated on more realistic explosion configurations
Radisson, Basile. "Dynamique non linéaire de fronts de flammes : expériences et modélisation". Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0124.
Pełny tekst źródłaIn many applications where premixed combustion is involved, the flame thickness is weak compared to the scales of the flow. This property allows to describe the flame frontevolution as an interface dynamics. In this manuscript some experiments are performed in order to check the validity of such models. The experiments are carried out in a Hele-Shaw burner. This quasi-bidimensional configuration allows for an accurate analysis ofthe flame front evolution. First, the dynamics of an initially flat flame propagating in aquiescent flow are analyzed. A quantitative comparison of an experimental flame evolution with the one predicted by a Michelson-Sivashinsky type equation is obtained for the firsttime. Moreover, the analytic pole solutions of this model allows us to predict some statisticproperties of the flame front. These predictions are shown to still be valid at large time,where the external noise plays an important role in the observed dynamics. In a second part, flame/burner interactions are investigated. A new vibroacoustic coupling mechanismis identified. Then, harnessing the properties of this vibroacoustic coupling, the flame issubmitted to an oscillating flow. It allows us to explore some characteristics of the flame response to a time dependent external forcing. Finally, the flame is submitted to a weaklyturbulent flow. The influence of the flow fluctuations intensity on the turbulent flamespeed is explored. The flame speed increase is shown to switch from a sublinear regime atsmall forcing to a superlinear one when the forcing intensity is approaching the laminar flame speed value
LACHAUX, Thierry. "Etude des effets de la haute pression sur la structure et la dynamique des flammes turbulentes de prémélange pauvre de méthane-air". Phd thesis, Université d'Orléans, 2004. http://tel.archives-ouvertes.fr/tel-00010401.
Pełny tekst źródłaDenet, Bruno. "Simulations numériques d'instabilités de front de flamme". Aix-Marseille 1, 1988. http://www.theses.fr/1988AIX11155.
Pełny tekst źródłaTrouvé, Arnaud. "Instabilités hydrodynamiques et instabilités de combustion de flammes turbulentes prémélangées". Châtenay-Malabry, Ecole centrale de Paris, 1989. http://www.theses.fr/1989ECAP0097.
Pełny tekst źródłaBoury, Gaël. "Etudes théoriques et numériques de fronts de flammes plissées : dynamiques non-linéaires libres ou bruitées". Poitiers, 2003. http://www.theses.fr/2003POIT2255.
Pełny tekst źródłaUsually, premixed flames are thin. We view them as active interfaces. Evolution Equations for their front are obtained from asymptotic expansions in the density-contrast. Flame dynamics seems accurately controlled only by the interplay amongst elliptic hydrodynamics, a geometric non-linearity coming from the flame normal propagation (Huygens), the change in density, and the overall geometry, provided minimal symmetries (Galilean, translation, rotation) are fulfilled, or explicitly broken. Examining three configurations confirms the thesis, namely: flames anchored in the presence of a strong tangential blowing and external forcing, influence of a weak gravity field, 3-Dimensional expansions. Our methods are analytical and pseudo-spectral. In each case, scaling laws for wrinkling are identified. These are in good agreement with available experiments. Open problems are also evoked
Clanet, Christophe. "Instabilités de propagation de flammes monophasiques et diphasiques dans une enceinte semi-ouverte". Aix-Marseille 1, 1995. http://www.theses.fr/1995AIX11071.
Pełny tekst źródłaRego, Rui. "Sur un modèle non linéaire d'interaction entre flamme et acoustique". Poitiers, 2006. http://www.theses.fr/2006POIT2304.
Pełny tekst źródłaPremixed flames may be considered as thin active interfaces, a point of view that we adopt here. Whereas accurate asymptotic expansions methods exist to obtain first-order-in-time Evolution Equations, whenever flow-field accelerations intervene those methods fail to provide an unambiguous answer. Still, suitable designed Evolution Equations that are able to handle with flow accelerations are tailored, based on phenomenological grounds, symmetry arguments, and consistency with known limiting cases. Those describe flame dynamics by a second-order-in-time Evolution Equation, with a geometrical non-linearity stemming from normal (Huygens) propagation, the density change, the overall geometry, and the inertia-induced gravitational forcing, provided that Galilean invariance is fulfilled. This flame EE model is numerically coupled with its self-induced acceleration field, where linear acoustics is shown to prevail on transverse average. The flame-shape evolution is handled via a Fourier pseudo-spectral method, which is checked against flame responses to prescribed accelerations successfully, even in the nonlinear regime. This nonlinear, global, system model is solved for flames in tubes as an example. Follow-on studies are also envisaged
Palies, Paul. "Dynamique et instabilités de combustion des flammes swirlées". Phd thesis, Ecole Centrale Paris, 2010. http://tel.archives-ouvertes.fr/tel-00545421.
Pełny tekst źródłaPoinsot, Thierry. "Analyse des instabilités de combustion de foyers turbulents prémélangés". Paris 11, 1987. http://www.theses.fr/1987PA112065.
Pełny tekst źródłaKsiążki na temat "Instabilités de front de flamme"
Mégret, Bruno. La flamme: Les voies de la renaissance. Paris: R. Laffont, 1990.
Znajdź pełny tekst źródłaCzęści książek na temat "Instabilités de front de flamme"
Sato, Mako, i Yasuhide Fukumoto. "Influence of an oblique magnetic field on planar flame front instability". W 2019-20 MATRIX Annals, 439–59. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-62497-2_26.
Pełny tekst źródłaOrtoleva, Peter J. "Reaction Front Morphology". W Geochemical Self-Organization, 111–35. Oxford University PressNew York, NY, 1994. http://dx.doi.org/10.1093/oso/9780195044768.003.0007.
Pełny tekst źródłaSIV ASHINSKY, G. I. "Nonlinear analysis of hydrodynamic instability in laminar flames—I. Derivation of basic equations". W Dynamics of Curved Fronts, 459–88. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-08-092523-3.50048-4.
Pełny tekst źródłaStreszczenia konferencji na temat "Instabilités de front de flamme"
BYCHKOV, VITALIY. "FLAME FRONT INSTABILITIES AND DEVELOPMENT OF FRACTAL FLAMES". W Conference on Fractals 2002. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777720_0021.
Pełny tekst źródłaGopalakrishnan, Harish Subramanian, Andrea Gruber i Jonas Moeck. "Computation of Intrinsic Instability and Sound Generation From Autoignition Fronts". W ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82480.
Pełny tekst źródłaOravecz, Lisa M., Indrek S. Wichman i Sandra L. Olson. "Instability of Flame Spread in Microgravity". W ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-1118.
Pełny tekst źródłaMukaiyama, Kenji, i Kazunori Kuwana. "Influence of Flame Front Instability on Flame Propagation Behavior". W ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44223.
Pełny tekst źródłaZhu, Shengrong, i Sumanta Acharya. "Effects of Hydrogen Addition on Swirl-Stabilized Flame Properties". W ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23686.
Pełny tekst źródłaBaghirzade, Mammadbaghir, Md Nayer Nasim, Behlol Nawaz, Jonathan Aguilar, Martia Shahsavan, Mohammadrasool Morovatiyan i John Hunter Mack. "Analysis of Premixed Laminar Combustion of Methane With Noble Gases as a Working Fluid". W ASME 2021 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/icef2021-67516.
Pełny tekst źródłaKusakai, Takafumi, i Satoshi Kadowaki. "Numerical Simulation on the Instability of Cylindrically Expanding Premixed Flames With Radiative Heat Loss at Low Lewis Numbers". W ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44181.
Pełny tekst źródłaSamarasinghe, Janith, Wyatt Culler, Bryan D. Quay, Domenic A. Santavicca i Jacqueline O’Connor. "The Effect of Fuel Staging on the Structure and Instability Characteristics of Swirl-Stabilized Flames in a Lean Premixed Multi-Nozzle Can Combustor". W ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63688.
Pełny tekst źródłaFaldella, Filippo, Sebastián Eisenring, Taesung Kim, Ulrich Doll i Peter Jansohn. "Turbulent Flame Speed and Flame Characteristics of Lean Premixed H2-CH4 Flames at Moderate Pressure Levels". W ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-102527.
Pełny tekst źródłaPeracchio, A. A., i W. M. Proscia. "Nonlinear Heat-Release/Acoustic Model for Thermoacoustic Instability in Lean Premixed Combustors". W ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-269.
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