关键词: 空气污染;氢氧燃烧;化学动力学;分析

Abstract: Quantitative analysis have been conducted which show the effects of H2O, O, H, OH, NO on the finite-rate chemical kinetics of premixed hydrogen and air. Calculations were made over the pressure range of 0.02 to 0.2 MPa, over the temperatures range of 910 to 2000K, and at the hydrogen-air mixture equivalence ratio of 1.0. The finite-rate chemistry model includes 38 reactions among 13 species of the H2-O2-N2 system. The reactions contained in the mechanism reflect the current state of knowledge of the chemistry of the hydrogen-air system. The results indicate that the presence of H2, NO, O, H and OH can have significant effect on ignition time within certain mixture temperature. The reaction times is not affected by the initial amounts offree radicals, but is dominantly influenced by the H2O. This study deals with the effect of vitiated air contamination on combustion and scramjet engine ground tests. Combustion kinetics appears as the significant factor in a study on the effect of vitiation.

Key words: Air pollution;Hydrogen oxygen combustion;Reaction kinetics;Analyzing