乙烯燃烧简化化学动力学模型及其验证

Reduced chemical kinetics and test for ethylene combustion

采用'准稳态'方法,从乙烯燃烧的详细化学反应动力学模型出发,建立了包含20个组分和16步总包反应的简化化学动力学模型。为检验动力学模型的有效性,在我国同步辐射实验室燃烧站上开展了乙烯/O2/Ar的层流预混火焰组分测量。应用一维数值方法对实验结果进行了模拟,计算的组分分布和实验测量数据进行了对比。结果表明:简化反应动力学模型能有效地再现详细基元反应模型的反应机理,具有较高精度;但采用乙烯详细化学动力学模型计算结果与实验测量还存在一定的差异,需要进一步改进。

A reduced chemical kinetics including 20 species and 16 global reactions was obtained by reducing the detailed kinetics for ethylene combustion with the method of quasi-steady state approximation （QSSA）. Experimental measurements of a laminar premixed ethylene/O2/Ar flame were carried out on the combustion station at National Synchrotron Radiation Laboratory （NSRL） to validate the kinetics. One-dimensional numerical method was implemented to simulate the test. Comparison with each other shows that the reduced kinetics has the ability to represent efficiently the reaction mechanisms of detailed element reaction model. Some difference between the experimental data and calculated results with detailed kinetics indicates the modifications of the detailed kinetics is needed.