Effects of Inlet Temperature on Lean Blowoff of Ammonia Hydrogen Flames Inside a Toroidal Jet-Stirred Reactor

Due to rising concerns about global surface temperatures and carbon emissions, there has been an increased interest in studying alternative fuels. Ammonia and hydrogen are fuels with the potential to replace general biofuels, hydrocarbons, and sustainable aviation fuels, as they do not contain any carbon, eliminating carbon emissions. However, they are both dangerous to store and work with, and their combustion characteristics still need to be further studied. Neat ammonia's poor combustion properties hinder its use as a fuel, but when mixed with a more reactive fuel such as hydrogen, improved sustainment and ignition can be seen. Preliminary experiments have shown that different inlet conditions in this case temperature can influence lean blowout. Thus, this work will study the lean blow-out stability limits of turbulent ammonia-hydrogen flames at various concentrations and different jet-ring inlet temperatures. Lean blowout is determined by a significant and sustained decrease in temperature, measured by thermocouples, or visual flame extinction.