It is well known that the combustion of higher hydrocarbons is governed by a hierarchical structure of the underlying detailed reaction mechanisms. This allows (at least for high-temperature kinetics) the construction of combustion mechanisms for higher hydrocarbons based on the H_2, CO, and C_1-C_4 oxidation mechanisms by adding reactions for the decomposition of the higher hydrocarbons. In this work, we show how this hierarchical structure is reflected in simplified kinetic schemes based on intrinsic low-dimensional manifolds (ILDMs). An analysis of the dynamical behavior of the chemical system reveals that (at least for low dimensions) the dynamics can be represented by generic ILDMs which do not depend on the specific fuel considered. This allows the construction of ILDMs of higher hydrocarbons based on existing ILDMs of much simpler reaction mechanisms for C_1-C_2 or C_1-C_4 chemistry. Examples are shown for combustion of syngas, methane, iso-octane, n-dodecane, and other fuels. They verify the approach. The method can, however, he applied to a variety of other combustion systems, too.
展开▼
