一个改进的异辛烷氧化化学动力学骨架模型  

An Improved Skeletal Chemical Kinetic Model for Iso-Octane Oxidation

作　　者：刘耀东[1] 解茂昭[1] 贾明[1] 庞斌[1] 

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024

出　　处：《工程热物理学报》2013年第4期791-795,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51176020;No.51176021);美国通用汽车公司全球研发中心项目(No.GM024705-NV584)

摘　　要：本文重点关注预测层流火焰速度和反应中关键组分的演变过程,采用一种实用的思路构建了一个的异辛烷化学动力学骨架模型,包含32种组分和111个反应。基于骨架模型的构建目标,将异辛烷的燃烧过程考虑为以下两个部分:一部分是详细的小分子机理,它作为整个机理的"内核",详尽地描述了着火以后的反应过程和特性;另一部分是通过耦合"内核"来专门描述和控制着火特性的骨架模型。新的骨架模型分别采用激波管、喷射搅拌反应器、流动反应器、层流火焰速度和HCCI发动机进行了验证,均显示出很好的性能。Focusing on predicting laminar flame speed and important species evolution, a skeletal chemical kinetic model for iso-octane oxidation is constructed by using a practical methodology. The new model consists of 32 species and 111 reactions. Based on the skeletal model target, the methodology considers a combustion mechanism as two parts： a comprehensive part describing reaction processes involving small radicals and molecules as the ＇core＇, and a skeletal one which, in coupling with the ＇core＇, controls the ignition characteristics. The new iso-octane model has been validated against various experimental data including shock tube, jet-stirred reactor, flow reactor, laminar flame speed and HCCI engine, and shows good performance in all the cases.

关 键 词：异辛烷 化学反应动力学 骨架模型 发动机 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]