摘要
为了研究RP-3航空煤油的点火和燃烧特性,基于敏感性分析方法,对一种RP-3数值模拟替代燃料正葵烷的化学反应机理(62组分344步)进行简化,得到对平衡温度和组分浓度有重要影响的基元反应,建立一种该替代燃料的36组分62步简化反应机理。利用CHEMKIN 4.1中完全搅拌反应器对该简化机理进行研究与检验,并在预混燃烧器中对该简化机理进行数值计算,与详细机理结果和试验数据进行比较。计算结果表明:在完全搅拌反应器中采用62步机理计算得到的平衡温度,反应物和主要生成物的摩尔分数与344步详细化学反应机理计算结果整体变化趋势吻合较好;在预混燃烧器中采用62步机理得到的进口反应物和出口生成物摩尔分数与详细机理结果和试验数据稍有差异,但基本变化趋势基本一致。因此,文中获得的62步简化机理能在较大范围内反映正葵烷的燃烧性能,并且大大提高其计算效率。
In order to investigate the ignition and combustion characteristics of RP-3 kerosene, the chem- ical reaction mechanism（62 species and 344 steps） of n-decane, as a kind of surrogate fuel of RP-3 kero- sene, is simplified to obtain a new reduced mechanism （36 species and 62steps） based on sensitivity a- nalysis. The reduced mechanism is then tested in perfectly stirred reactor （PSR）and the premixed burn- er by using CHEMKIN 4. 1. Furthermore, the simpified mechanism is numerically calculated in the premixed burner,and the results are compared with that of the mechanism of 344 steps and experimental data. The numerical results of the reduced kinetic mechanism show the good agreement with that of the mechanism of 344 steps on the equilibrium temperature, the reactant and major component concentra- tion in PSR, and the reactant and the major component concentration by using the reduced kinetic mech- anism in the premixed burner basically agree with that of the mechanism of 344 steps and experimental data. Therefore the reduced mechanism can reflect the combustion characteristics of n-decane well with- in wide temperature range and improve the computational efficiency at the same time.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2015年第4期579-587,共9页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国家自然科学基金(50906040)资助项目
航空科学基金(2013ZB52017)资助项目
关键词
敏感性分析
正葵烷
简化机理
完全搅拌反应器
预混燃烧器
sensitivity analysis
n-decane
reduced mechanism
perfectly stirred reactor
premixed burner
