Effects of Heat Transfer on Combustion Characteristics in a Cylindrical Vortex Combustor
DOI:
https://doi.org/10.37934/arnht.27.1.120131Keywords:
Heat transfer, Meso-scale combustor, Vortex combustions, Equivalence ratio, CFDAbstract
A vortex flows in micro/meso scale combustors for small-scale power generation play a crucial role in enhancing combustion efficiency and stability. They enhance mixing between fuel and air, promoting better combustion and help stabilize flames by maintaining consistent fuel-air ratios. The temperature are significantly impacts the reactant temperature due to heat conduction wall in Cylindrical Vortex Combustor (CVC). This phenomenon, known as preheating, occurs as the wall transfers heat to the reactants. ANSYS Fluent software is used for conducted a numerical investigation on a CVC. The combustor was characterized by a prescribed mass flow rate of 40 mg/s and an equivalence ratio (j) ranging from 0.5 to 1.5. Our analysis aimed to understand the combustion behavior within this confined geometry, considering factors such as heat loss and temperature behavior. The numerical findings indicate that elevated equivalence ratios correlate with the highest flame temperature in micro-combustion. Specifically, at an equivalence ratio of j=0.5, the flame temperature remains consistently low compared to the higher value of j=1.5. However, when accounting for wall temperature effects, the maximum flame temperature occurs at an equivalence ratio of j=1.3. The heat dissipation region is quite limited, especially at low equivalence ratio. In summary, heat transfer in cylindrical vortex combustors (CVC) contribute to reliable and efficient power generation, making them essential for portable energy systems.
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