基于自适应化学理论的复杂CH_4燃烧模拟

MODELING OF CH_4 COMBUSTION USING ADAPCHEM

麻省理工学院化工系的Green教授提出了自适应化学理论AdapChem的概念。这种方法根据反应条件的不同,分别使用多个简化化学反应模型而非复杂的详细基元反应模型进行区域内的数值模拟。该法提供了在保证化学精度条件下,避免效率浪费的一条有效途径。然而,为了完善AdapChem,引入以往没有考虑过的辐射模型是有必要的。为此,该文使用的是离散坐标法并对复杂CH4空气火焰进行了模拟,得到了较为理想的结果。

Recently, an adaptive chemistry (adapchem) concept was proposed (green and schwer, 2001; schwer et al, 2001). In this method, several different reduced models are used in a simulation, each reduced model being used only under reaction conditions where it is representative to (he full model. Adapchem approach provides a method for avoiding this loss of efficiency while retaining chemical accuracy where it is required. However, it is necessary to add radiation model in order to develop AdapChem for application to real combustion system. This paper uses Discrete Ordinates Method for radiation model. The simulations from the CH4/air flame calculation are reasonable.