Abstract
Ammonia, a potential hydrogen energy carrier, offers high energy density as a carbon-free fuel, yet its application in micro burners is limited by flame instability. To capitalize on this energy potential, this study innovatively employs a magnetic field to enhance micro-flame stability, marking a novel approach to harnessing the benefits of ammonia. Our investigations into micro-diffusion flames, fueled by ammonia and methane, reveal that the magnetic field not only reduces axial velocity and leading to a back-flow zone, but also directly correlates with peak temperatures and maximal heat release rates. The quenching speed limit elevates with increasing ammonia molar fraction, attributed to the reduced fuel performance. Significantly, the magnetic field broadens the flammable fraction of ammonia, suggesting an effective stabilization strategy. This research underscores the transformative potential of magnetic fields in optimizing flame properties and the energy efficiency of micro-combustion systems powered by ammonia.
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