| Summary: | 碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 104 === In this study, a skeletal kinetic mechanisms for biodiesel fuel surrogates is developed for fuel oxidation that can overcome the barrier of incorporating detailed chemistry to computational fluid dynamics (CFD) for fuel combustion. This study begins from (1) assembling mechanisms which are able to predict experimentally measured methyl isobutyrate (MIB), polycyclic aromatic hydrocarbons (PAHs) and compound (C5H10) (2) generating a minimized skeletal mechanism for methyl butanoate (MB) oxidation. Using the path flux analysis method, the minimized skeletal mechanism is obtained by the determination of a trade-off between the accuracy and mechanism size. The newly derived compact mechanisms are examined in ignition delay time in 0-D shock tube modeling, 1-D premixed burner flame, 1-D counterflow diffusion flame, and 2-D laminar diffusion flame. We carry out the error analyses introduced by the removal of species and reactions from the detailed mechanism. The rate of production (ROP) and sensitivity analysis (SA) are used to improve the predictions of skeletal mechanisms. Moreover, the revised MIB skeletal mechanism are selected to be combined with the soot sub model to obtain a skeletal mechanism which is able to predict the heavy PAHs and soot formation in pure methane flame and methane/air diffusion flame doped with MIB.
|
|---|
