摘要
为准确模拟RP-3航空煤油的着火和燃烧特性,提出摩尔分数为41%正十二烷、37%正癸烷、3%正丙基环己烷、19%正丙基苯的4种组分替代燃料模型,模型包含136种组分、308步基元反应。通过计算对单组分详细机理进行简化,完成了简化机理的反应动力学验证;同时完成RP-3航空煤油层流燃烧速度的实验和4种组分替代燃料模型的验证。结果表明:在压力p=101.325、202.65 kPa,当量比Ф=0.5、1.0、1.5工况时,该机理模拟得到的着火延迟时间与实验值能够很好吻合,均存在明显的NTC区域;在压力p为101.325~303.975 kPa,当量比Ф为0.8~1.4,温度T为420、450、480 K时,计算得到的层流燃烧速度与实验值较为吻合。通过与其他文献对比得出,该4种组分替代燃料燃烧机理拟合准确度较高,国产航空煤油着火特性与燃烧特性表现良好,相关工作具有一定的工程应用价值。
In order to accurately simulate the ignition and combustion characteristics of RP-3 aviation kerosene,a four-component alternative fuel model with mole fractions of 41%n-dodecane,37%n-decane,3%n-propylcyclohexane,and 19%n-propyl benzene was proposed.The model contained 136 components and 308 elementary reactions.The single-component detailed mechanism was simplified,and the reaction kinetics verification of the simplified mechanism was completed.The laminar combustion velocity experiment of RP-3 aviation kerosene was completed,and the four-component alternative fuel model was verified.The results show that when the pressure is 101.325 kPa and 202.65 kPa and the equivalence ratio is 0.5,1.0 and 1.5 respectively,the ignition delay time obtained by the mechanism simulation is in good agreement with the experimental value,and there is an obvious NTC region.When the pressure is 101.325~303.975 kPa,the equivalence ratio is 0.8~1.4 and the temperature is 420 K,450 K and 480 K respectively,the calculated laminar combustion velocity is in good agreement with the experimental value.By comparing with other works of literature,it is concluded that the combustion mechanism of the four-component alternative fuel has high fitting accuracy,and the ignition and combustion characteristics is good,and the related work has certain engineering application value.
作者
马洪安
魏忠秀
付淑青
刘宇
宫俊波
苗磊
MA Hong-an;WEI Zhong-xiu;FU Shu-qing;LIU Yu;GONG Jun-bo;MIAO Lei(College of Aero-engine,Shenyang Aerospace University,Shenyang 110136,China)
出处
《沈阳航空航天大学学报》
2022年第5期1-13,共13页
Journal of Shenyang Aerospace University
基金
国家自然科学基金(项目编号:51506132,51606129)。
关键词
RP-3航空煤油
替代燃料
反应机理
层流燃烧速度
着火延迟时间
4种组分
RP-3 aviation kerosene
alternative fuel
reaction mechanism
laminar combustion velocity
ignition delay time
four-component
