Iranian Journal of Mechanical Engineering Transactions of the ISME

Iranian Journal of Mechanical Engineering Transactions of the ISME

Comparative Evaluation of Combustion Mechanisms (GRI 3.0 and DRM19) in MILD Combustor

Document Type : Research Paper

Authors
1 PhD Student, Faculty of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
2 Professor, Faculty of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
Abstract
One of the newest combustion technologies is the MILD combustion process, which is based on preheating fuel and air and diluting the oxygen content of the air to produce a proper mixing of the reactants. In the present study, MILD combustion of methane is simulated in a lab-scale combustor and its results will be compared in two modes of combustion mechanisms, namely DRM19 (as reduced mechanism) and GRI 3.0 (as complete mechanism). The results show that both mechanisms have uniform temperature distribution, diluting of oxygen reaches to below 5% and the amount of NOX and CO pollutants is reduced to below 10ppm. However, based on the solution procedure, the DRM19 mechanism has higher accuracy and convergence speed compared to GRI 3.0.
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