Abstract: Diethyl ether (C₄H₁₀O, DEE) is a promising oxygenated fuel with a cetane number of up to 125 and can be used for cold starts in engines and diesel engines, so diethyl ether is often seen as a potential alternative fuel for diesel engines. The study of the chemical kinetics of diethyl ether started late, and most of the DEE Combustion reaction mechanisms found in literature are detailed mechanisms with a large number of species and reactions, making them difficult to use in high-dimensional numerical simulations. In this study, based on the minimized reaction network (MRN) method, 3 species and 7-step reactions were added to the previously developed C0-C2 to construct a diethyl ether combustion mechanism (DEE-CKL) with 32 species and 56 reactions. The two-parameter form of the Arrhenius equation (A, E) is used to describe the rate constant of the reaction. Finally, the ignition delay time and laminar flame speed of the constructed DEE-CKL mechanism were simulated using Chemkin-Pro software. The simulation results were compared with existing experimental results, and the comparison indicated that the constructed DEE-CKL mechanism could effectively reproduce the experimental results, demonstrating the reliability and practicality of the DEE-CKL mechanism.

Key words: Diethyl ether, combustion reaction mechanism, Minimized reaction network, Chemical equilibrium