Advancing the Combustion of Hydrogen-AmmonIa blEnds for improVed Emissions and stability

To mitigate the impact of greenhouse gas on the environment and climate, the gas turbine power generation industry must rapidly reduce its emissions. This requires abandoning the traditional combustion of carbon-based natural gas in favour of carbon-free fuels. ACHIEVE aims at developing the fundamental knowledge to enable a transition to unconventional carbon-free fuel blends based around H2 and NH3 to achieve zero carbon emissions, ultra-low NOx emissions, and stable gas turbine operation. ACHIEVE proposes a three-pronged strategy consisting of (a) experimental and (b) numerical activities, that will advance the technology readiness level (TRL) up to 4 for practical low emissions combustors for realistic and representative blends of fuels, as well as (c) system level engagement with OEMS, end users, and stakeholders. Experimental campaigns will explore combustor stability limits, emissions, and fundamental aspects of the combustion of hydrogen blends, with the complexity of the experimental burners and operating conditions increasing over time and culminating in tests performed at intermediate pressures and powers relevant for gas turbine conditions. Numerical activities will address combustion modelling challenges, including chemical kinetics, fundamental physics governing flame dynamics, ushering in new modelling techniques such as artificially thickened flames coupled with virtual chemistry, sub-grid LES models for thermo-diffusive instabilities and stability analysis aimed to understand and predict NOx formation mechanism, lean blow off, flashback limits and thermoacoustic instabilities. Real-time monitoring and predictive capabilities for practical combustion systems will also be developed. Finally, in the third prong, engagement with industry, OEMs, and other target groups will leverage the results of ACHIEVE with the necessary stakeholders to progress the transition to a carbon-free fuels for power generation.