Abstract
In this work, three-dimensional numerical simulations with a simplified reaction mechanism are conducted to investigate the effect of implementing a perforated plate in an ammonia-fueled micro-power systems on the NOx emission behavior. Detailed analyses on 1) the perforated plate hole dimensionless width w, dimensionless location l as well as the material property are performed. Results show that with an optimized perforated plate implemented, the NO emission is reduced by up to 73.3 % compared to those in the absence of perforated plates. The decrease is mainly due to the formation of a recirculation zone with a low flame temperature. Increasing w is shown to play a positive role in minimizing the NO generation, while l leads to a reverse trend resulting from the size variation of the recirculation zone. In contrast, the plate material has a negligible effect on NOx emissions. It is also shown that the pressure loss Ploss is varied non-monotonically with l, but monotonically with w and the NH3 volumetric flow rate. Furthermore, the conjugate heat transfer between the plate and combustion products has a certain impact on Ploss. The present work shed lights on reducing NOx emissions by implementing a well-designed perforated plate for practical micro-power systems.
Original language | English |
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Article number | 123848 |
Journal | Journal of Hazardous Materials |
Volume | 401 |
DOIs | |
Publication status | Published - 5 Jan 2021 |
Keywords
- Ammonia
- Micro-combustion
- NOx Emission
- Perforated plate
- Pressure loss