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Numerical investigation of combustion characteristics of ammonia-air mixtures under high pressure lean conditions
Presentation

Numerical investigation of combustion characteristics of ammonia-air mixtures under high pressure lean conditions

Hadi NozariArif Karabeyoğlu

In this numerical study we investigate the combustion characteristics of ammonia-air mixtures at elevated pressure and lean conditions which are encountered in gas turbine combustors. The Konnov mechanism is implemented to predict the laminar burning velocity, autoignition, species concentrations and the sensitivity analysis of ammonia decomposition and laminar flame speed. A laminar premixed freely propagating flame model is implemented to calculate burning velocity, mole fractions of species, and contribution of reactions in molar conversion of specific species. Also a homogenous reactor model is used to analyze the temporal mole fraction of radicals and ignition delay time. Effects of adding hydrogen…

Simulation of Fuel Economy of Gasoline-Ethanol-Ammonia Tertiary Fuel Blends for a Series Hybrid Electric Vehicle
Presentation

Simulation of Fuel Economy of Gasoline-Ethanol-Ammonia Tertiary Fuel Blends for a Series Hybrid Electric Vehicle

Shehan Haputhanthri

With the depletion of petroleum resources around the world, a need to have cleaner and fuel efficient automotive technologies and alternative fuel sources has become prominent. Hybrid electric vehicles and sustainable energy sources have gained a high momentum in fulfilling this requirement. To satisfy both needs ammonia, which has been used for a long period of time as a sustainable and carbon free transport fuel can be combined with hybrid electric vehicles. Ammonia when blended with gasoline can be used as an alternate fuel to power existing internal combustion engines. Such blends similar to ethanol-gasoline fuel blends would provide a…

Presentation

Characteristics of Ammonia / N2 / O2 Laminar Premixed Flame in Oxygen-enriched Condition

Hiroyuki TakeishiJun HayashiShota KonoKimio IinoFumiteru Akamatsu

The problems of ammonia fuel are a low combustion qualities compared with the combustion qualities of hydrocarbon fossil fuels. In this study, the laminar burning velocity was used as the indicator of the combustion quality. Since the laminar burning velocity of ammonia fuel is low compared with that of other fossil fuels, it is necessary to increase the combustion quality in order to utilize the ammonia as an alternative fuel in conventional combustion systems. In this study, the oxygen-enriched combustion was applied to an ammonia/N2/O2 premixed flame for achieving higher burning velocity. The effects of the oxygen-enriched combustion on the…

Ammonia as an alternate transport fuel: Emulsifiers for gasoline ammonia fuel blends and real time engine performance
Presentation

Ammonia as an alternate transport fuel: Emulsifiers for gasoline ammonia fuel blends and real time engine performance

Shehan Haputhanthri

Ammonia is a carbon-free solution to energy crisis without strenuous changes to the existing infrastructure. Ammonia and hydrocarbon liquid fuel blends can be used to power existing IC engines as an alternative transportation fuel. Due to the structure of ammonia and hydrocarbon molecules an emulsifying agent has to be used to obtain a stable and high molality solution. Feasibility of ammonia and gasoline liquid fuel blends using ethanol and methanol as emulsifiers was studied in this research. A small thermo-stated vapor liquid equilibrium (VLE) high pressure cell was used to study the solubility of ammonia in gasoline. A larger VLE…