Numerical investigations on flashback dynamics of premixed methane-hydrogen-air laminar flames

2022-07-12
Kıymaz, Tahsin Berk
Böncü, Emre
Güleryüz, Dilay
Karaca, Mehmet
YILMAZ, BARIŞ
Allouis, Christophe Gerard
Gökalp, İskender
© 2022 Hydrogen Energy Publications LLCInjecting hydrogen into the natural gas network to reduce CO2 emissions in the EU residential sector is considered a critical element of the zero CO2 emissions target for 2050. Burning natural gas and hydrogen mixtures has potential risks, the main one being the flame flashback phenomenon that could occur in home appliances using premixed laminar burners. In the present study, two-dimensional transient computations of laminar CH4 + air and CH4 + H2 + air flames are performed with the open-source CFD code OpenFOAM. A finite rate chemistry based solver is used to compute reaction rates and the laminar reacting flow. Starting from a flame stabilized at the rim of a cylindrical tube burner, the inlet bulk velocity of the premixture is gradually reduced to observe flashback. The results of the present work concern the effects of wall temperature and hydrogen addition on the flashback propensity of laminar premixed methane-hydrogen-air flames. Complete sequences of flame dynamics with gradual increases of premixture velocity are investigated. At the flame flashback velocities, strong oscillations at the flame leading edge emerge, causing broken flame symmetry and finally flame flashback. The numerical results reveal that flashback tendency increase with increasing wall temperature and hydrogen addition rate.
International Journal of Hydrogen Energy

Suggestions

Gis-based site selection approach for wind and solar energy systems : a case study from western Turkey
Aydın, Nazlı Yonca; Kentel Erdoğan, Elçin; Department of Geodetic and Geographical Information Technologies (2009)
Many countries around the world integrated Renewable Energy Systems (RES) in their future energy plans in order to reduce negative impacts of fossil fuel consumption on the environment. However, RES may as well cause various environmental problems which are mostly related with the geographic locations of these facilities. The aim of this thesis is to create a Geographic Information System-based methodology for evaluating alternative locations for wind, solar and hybrid power plants by using fuzzy multi-crit...
Optimum daily operation of a wind-hydro hybrid system
Ercan, Eray; Kentel Erdoğan, Elçin (2022-06-01)
© 2022 Elsevier LtdDue to the negative effects of fossil fuels on the environment and health, energy supply is shifting towards renewables. The integration of renewable energy systems is challenging due to the intermittent nature of renewables, however this can be mitigated through storage. Uncertainty in electricity prices in spot markets further complicates the operation of these systems. Pumped storage hydropower is currently the most viable form of large-scale energy storage, and operation of renewable ...
Experimental and numerical modeling of direct injection of CO 2 into carbonate formations
Izgec, O.; Demiral, B.; Bertin, H.; Akın, Serhat (Society of Petroleum Engineers (SPE); 2006-11-20)
Sequestration of carbon dioxide in geological formations is an alternative way to manage the carbon emitted by combustion of fossil fuels. Results of an experimental and numerical modeling study aiming to investigate the important aspects of injection of CO2 in carbonate formations are presented. Different from sandstones, in carbonates surface reaction rates are very high, so mass transfer often limits the overall reaction rate, leading to highly non-uniform dissolution patterns. Often, large flow channels...
Mathematical modeling of FBC'a co-fired with lignite and biomass
Moralı, Ekrem Mehmet; Selçuk, Nevin; Department of Chemical Engineering (2007)
Increasing environmental legislations on pollutant emissions originated from fossil fuel combustion and intention of increasing the life of existing fossil fuels give rise to the use of renewable sources. Biomass at this juncture, with its renewable nature and lower pollutant emission levels becomes an attractive energy resource. However, only seasonal availability of biomass and operation problems caused by high alkaline content of biomass ash restrict its combustion alone. These problems can be overcome b...
Energy consumption, income, and carbon emissions in the United States
Soytaş, Uğur; Sarı, Ramazan (2007-05-15)
This paper investigates the effect of energy consumption and output on carbon emissions in the United States. Earlier research focused on testing the existence and/or shape of an environmental Kuznets curve without taking energy consumption into account. We investigate the Granger causality relationship between income, energy consumption, and carbon emissions, including labor and gross fixed capital formation in the model. We find that income does not Granger cause carbon emissions in the US in the long run...
Citation Formats
T. B. Kıymaz et al., “Numerical investigations on flashback dynamics of premixed methane-hydrogen-air laminar flames,” International Journal of Hydrogen Energy, vol. 47, no. 59, pp. 25022–25033, 2022, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85136318329&origin=inward.