氢气和过氧化氢对正癸烷燃烧特性影响的对比

氢气(H2)和过氧化氢(H2O2)具有较强的反应活性，能够增强碳氢燃料的燃烧过程。为了探究添加液态氢和液态过氧化氢对航空燃油燃烧特性的影响，以正癸烷为代理燃料，采用数值模拟方法对比研究了H2和H2O2对正癸烷/空气燃烧特性的影响。研究发现，随着H2O2的增加，点火延迟时间显著缩短；而随着H2的增加，初始温度为1100 K时，点火延迟时间基本不变，在初始温度为1600 K时点火延迟时间略有缩短。随着H2O2的增加，层流火焰速度有所提升，而H2添加量对层流火焰速度的提高相对而言较小。富油燃烧时，CO排放指数随H2O2和H2的增加有所降低，NO排放指数有所增长。低压贫油燃烧时，H2O2和H2添加量对CO和NO排放指数基本没有影响；高压贫油燃烧时CO排放指数有所降低，NO排放指数有所提高，H2O2添加量的影响更加显著。 

Comparative study on the effects of hydrogen and hydrogen peroxide additions on combustion characteristics of n-decane/air mixtures

Hydrogen (H2) and hydrogen peroxide (H2O2) are useful promoters of hydrocarbons combustion due to their high reactivity. To explore the effects of liquid hydrogen and liquid hydrogen peroxide additions on combustion characteristics of jet fuel, a comparative computational study was conducted with n decane as a single component surrogate for the practical jet fuel. It was founded that H2O2 addition can significantly shorten the ignition delay times of fuel/air mixtures at all condition considered, while H2 addition had negligible effect on the ignition delay times at low temperature around 1100K compared with the notable effect at high temperature around 1600K. The H2O2 addition showed a more significant effect on increasing the laminar flame speeds than H2 addition. The H2O2 and H2 additions slightly reduced the emission index of CO (EICO), but increased the emission index of NO (EINO). EICO and EINO did not vary much with H2 and H2O2 addition levels at fuel lean and low pressure conditions. For rich fuel and high pressure conditions EICO decreased and EINO increased with increasing H2O2 and H2 additions; however, effects of H2O2 addition on both EICO and EINO were much significant than H2 addition.