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本文作了H_2O、O、H、OH和NO对氢-空气燃烧影响的化学动力学计算.计算范围是:压力0.02～0.2MPa,初始温度:910～2000K,当量油气比为1.0.有限速率化学反应模型包括38个反应式和13种组分的H_2-O_2-N_2系统,模型反应了氢-空气化学反应的当前最新研究成果.计算结果表明,在某些温度范围内,H_2O、O、H、OH和NO对着火时间有很大影响.反应时间并不受初始成份中自由原子和基的影响,但是初始成份中含有H_2O,将缩短反应时间.本研究关系到污染对燃烧的影响以及对于超音速燃烧冲压发动机地面试验的影响.燃烧化学动力学显然是污染影响中的一个重要因素.
In this paper, the chemical kinetic calculations of the effects of H 2 O, O, H, OH and NO on hydrogen-air combustion have been carried out.The calculation range is as follows: the pressure is 0.02-0.2 MPa, the initial temperature is 910-2000 K, the equivalent ratio is 1.0, The reaction model consisted of H_2-O_2-N_2 system with 38 reactions and 13 components, and the model reflected the latest research results of hydrogen-air chemistry.The results show that in some temperature range, H_2O, O, H , OH and NO have a great influence on the ignition time.The reaction time is not affected by the free atoms and radicals in the initial composition, but the initial composition contains H 2 O, which will shorten the reaction time.This study related to the impact of pollution on the combustion and for Effect of supersonic combustion ramjet ground test. Combustion chemical kinetics is clearly an important factor in the impact of pollution.