燃焼の反応機構と反応素過程 ─ (3) 反応機構簡略化

抄録

Combustion simulation is a promising tool in many ways such as understanding the mechanism of ignition and extinction, engine design, emission prediction and control, and fuel development. Regarding the chemical kinetics mechanism for the oxidation of hydrocarbon fuels, there are many investigations on the elementary reaction process, and now we have detailed chemical kinetics models which quantitatively predict the ignition timing and laminar flame velocity for the representative components and their mixtures included in the natural gas, gasoline, diesel fuels, kerosene, and jet fuels. When we combine these large chemical kinetics models into fluid dynamic simulations, the computational cost inhibits the practical use. Thus, the need for the reduction of detailed chemical kinetics model is increasing. This article describes the concept of surrogate fuel which mimics the combustion properties of real fuels with few or several representative hydrocarbon components. Then, we see the mechanism reduction method briefly. Finally, we see the construction of simplified model for gasoline surrogate fuel which predicts the autoignition timing and laminar flame velocity under the temperature and pressure related to the internal combustion engines.