Combustion In Micro Combustors With Reduced Chemical Kinetic Mechanism

Zainudin, Luqman Hakim (2017) Combustion In Micro Combustors With Reduced Chemical Kinetic Mechanism. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

A micro combustor is an alternative device to the conventional lithium-ion batteries. Miniaturized product development such as micro robots, notebook computers and other small scale devices are critical in need of powerful energy resources. Nonetheless, stabilizing flame inside narrow channel combustor is the greatest challenge for the researchers. This research can be categorized as fundamental research where the flame stabilization in micro combustors is investigated. In this project, two dimensional (2-D) numerical simulations that focus on the effect of thickness on combustion of micro combustor with reduced chemical kinetics mechanism were performed. By using ANSYS-Fluent 17.1 as the Computational Fluid Dynamics (CFD) tool, the blowout limits for micro combustors with different size of thickness is determined. The thickness use for each micro combustor design are 0.3 mm, 0.5 mm, 1.0 mm and 1.2 mm, respectively. The chemical reaction employed is global one-step and two-step propane-air mixture. The blowout limits for the different thickness micro combustor had been determined. Thus, trend pattern of the effect of combustor thickness on the flame stabilization are also deduced. From the results, it can be concluded that the thickness of the micro combustors significantly affect the blowout limits. Meanwhile, two types combustion reaction mechanism for propane-air mixtures were employed to investigate the effect reaction mechanism on flame stabilization limits. It is suggested that the reaction mechanism for one-step and two-step combustion of propane-air mixture does not significantly affect the flame stabilization limits of the combustors.

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