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Статті в журналах з теми "Mélange pauvre en hydrogène"
Harouadi, Farid, and Salim Boulahrouz. "Etude et Analyse de la Combustion Turbulente dans un Moteur Alimenté en Gaz Naturel." Journal of Renewable Energies 3, no. 2 (December 31, 2000): 93–103. http://dx.doi.org/10.54966/jreen.v3i2.914.
Повний текст джерелаRichter, H., J. Vandooren, and P. J. van Tiggelen. "Structure d'une flamme pauvre hydrogène-oxygène ensemencée ou non par le trifluorométhane." Bulletin des Sociétés Chimiques Belges 99, no. 7 (September 1, 2010): 491–501. http://dx.doi.org/10.1002/bscb.19900990708.
Повний текст джерелаTebibel, Hammou, Bouziane Mahmah, and Wahiba Bendaïkha. "Dimensionnement optimal d’un système photovoltaïque pour la production d’hydrogène pour usage en mélange avec le gaz naturel comprimé dans les véhicules." Journal of Renewable Energies 15, no. 4 (October 25, 2023): 621–28. http://dx.doi.org/10.54966/jreen.v15i4.351.
Повний текст джерелаANDRIEU, J. P., C. DEMARQUILLY, and J. ROUEL. "Conservation et valeur alimentaire des ensilages directs de prairies naturelles. Comparaison de trois types de conservateur." INRAE Productions Animales 3, no. 1 (February 3, 1990): 67–73. http://dx.doi.org/10.20870/productions-animales.1990.3.1.4362.
Повний текст джерелаDouaud, A. M., A. Ecomard, J. C. Guibet, and M. Prigent. "Potentiel des moteurs à mélange pauvre face aux moteurs actuels à réglage stoechiométrique : consommation, émissions, exigence en octane." Revue de l'Institut Français du Pétrole 43, no. 1 (January 1988): 111–23. http://dx.doi.org/10.2516/ogst:1988007.
Повний текст джерелаAsongwed-Awa, Anastasia, Oumarou Abakar, and Eric Vall. "Ingestion et digestibilité des rations à base de Calopogonium mucunoides par les ânes de trait pendant la saison sèche." Revue d’élevage et de médecine vétérinaire des pays tropicaux 56, no. 3-4 (March 1, 2003): 205. http://dx.doi.org/10.19182/remvt.9866.
Повний текст джерелаAmos, A. T., J. O. Amos Olowoniyi, D. U. Kareem, W. O. Olukowi, G. K. Odeyemi, E. O. Ajayi, D. O. Adekola, and O. M. O. Idowu. "Nutrient utilization by broiler chickens fed differently processed cassava-soya blends." Nigerian Journal of Animal Production 48, no. 6 (January 18, 2022): 237–57. http://dx.doi.org/10.51791/njap.v48i6.3304.
Повний текст джерелаShaahu, D. T., L. Abah, and J. A. Ayoade. "The effect of dietary replacement of maize with spent sorghum residue-cassava peel composite meal on growth performance and feed cost analysis in the diet of growing rabbits." Nigerian Journal of Animal Production 49, no. 1 (February 25, 2022): 215–23. http://dx.doi.org/10.51791/njap.v49i1.3420.
Повний текст джерелаde Ferrieres, Solène, Guillaume Vanhove, Abderrahman El Bakali, Jean-François Pauwels, and Micheline Montero. "Le mélange gaz naturel/hydrogène : un combustible alternatif pour réduire les émissions polluantes." Pollution atmosphérique, N°205 (2010). http://dx.doi.org/10.4267/pollution-atmospherique.718.
Повний текст джерелаMameri, Abdelbaki, Iskender Gökalp, and Djamel Boukeffa. "Simulation numérique de la stabilisation d’une flamme turbulente de méthane en régime pauvre par ajout d’hydrogène." Journal of Renewable Energies 10, no. 1 (November 12, 2023). http://dx.doi.org/10.54966/jreen.v10i1.797.
Повний текст джерелаДисертації з теми "Mélange pauvre en hydrogène"
Villenave, Nicolas. "Étude expérimentale des propriétés fondamentales de la combustion de l'hydrogène pour des applications de propulsion." Electronic Thesis or Diss., Orléans, 2025. http://www.theses.fr/2025ORLE1001.
Повний текст джерелаIn order to reach carbon neutrality by 2050, the European Union is considering hydrogen as a promising energy carrier to reduce reliance on fossil fuels. While fuel cells and electric vehicles already play an important role in decarbonizing the transport sector, hydrogen is also seen as an alternative to conventional fuels for heavy-duty vehicles. Yet, a number of challenges linked to the physico-chemical properties of lean hydrogen combustion are still under investigation: abnormal combustion phenomena, production of nitrogen oxides,instabilities due to thermodiffusive effects, to state a few. This thesis contributes to the understanding of the auto-ignition process in lean hydrogen/air mixtures, as well as the propagation of laminar and turbulent premixed flames. First, measurements of hydrogen/air and hydrogen/air/nitrogen oxides ignition delay times are carried out using a rapid compression machine, to update and validate a kinetic mechanism under spark ignition engine-like conditions. Second, outwardly propagating spherical premixed laminar flames were studiedin a constant-volume combustion chamber, varying the initial temperature and steam dilution, and considering the intrinsic instabilities linked to the physico-chemical properties of hydrogen namely thermodiffusive,hydrodynamic and gravity-related instabilities. Then, expanding premixed turbulent flames are characterized by the generation of a homogeneous and isotropic turbulence zone within a spherical chamber. A parametric study is conducted by varying turbulent intensity, initial pressure and equivalence ratio. Finally, a turbulent correlation is proposed to describe the turbulent propagation of such flames, for use in numerical models
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.
Повний текст джерелаThe 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
Malheiro, Salvador. "Etude expérimentale de la combustion d'un mélange méthane-air hétérogène globalement pauvre." Poitiers, 2002. http://www.theses.fr/2002POIT2253.
Повний текст джерелаBiet, Joffrey. "Etude expérimentale et numérique de la combustion en mélange pauvre des hydrocarbures légers." Orléans, 2004. http://www.theses.fr/2004ORLE2059.
Повний текст джерелаTaillefet, Thierry. "Combustion en milieu confiné d'un mélange pauvre initiée par un jet de gaz chauds." Poitiers, 1999. http://www.theses.fr/1999POIT2299.
Повний текст джерелаMusi, Andrea. "Réduction des oxydes d'azote en mélange pauvre en utilisant des alcools comme agents réducteurs." Paris 6, 2008. http://www.theses.fr/2008PA066199.
Повний текст джерелаGauducheau, Jean-Loup. "Amélioration du fonctionnement d'un moteur alimenté au gaz naturel en mélange pauvre par ajout d'hydrogène." Aix-Marseille 1, 1997. http://www.theses.fr/1997AIX11078.
Повний текст джерелаMichou, Yanick. "Etude expérimentale de flammes diphasiques turbulentes, partiellement prémélangées et prévaporisées d'un mélange pauvre heptane-air." Orléans, 2000. http://www.theses.fr/2000ORLE2050.
Повний текст джерелаMalet, Fabrice. "Etude expérimentale et numérique de la propagation de flammes prémélangées turbulentes dans une atmosphère pauvre en hydrogène et humide." Orléans, 2005. http://www.theses.fr/2005ORLE2050.
Повний текст джерелаBenissad, Farida. "Elaboration de fibres de carbone à partir du mélange méthane-hydrogène." Grenoble INPG, 1986. http://www.theses.fr/1986INPG0121.
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