摘要
采用最新化学反应动力学机理 ,对具有少量柴油引燃的天然气、空气混合物着火过程进行了理论分析。其中 :甲烷氧化机理包含 79个基元反应 ,涉及 32种组分 ;柴油反应机理包含 32 7个基元反应 ,涉及 71种组分。对IPIC- CFD 软件进行修改 ,使之适合双燃料系统的燃烧计算 ,程序采用了美国 SANDIA国家实验室 ,NASA和BERKEL EY大学热力学数据库中的相关参数以及大型化学反应动力学软件包 CHEMKIN 中相关的模型和子程序。运用开发的源码 ,计算了柴油、天然气和空气混合物在不同点火温度、不同当量比和不同压力下的着火延迟时间 ,同时预测了火焰中反应物、主产物。
The ignition process of premixed air natural gas (NG) with a little diesel pilot quantity was studied.A new mechanism was employed in which methane and diesel fuel consisted of 32 species in 79 reactions and 71 species in 327 reactions respectively.It could be applied to numerical prediction of combustion for the dual fuel system by IPIC CFD Ⅱ software modified.The released thermodynamic databases of Sandia National Lab and NASA as well as University of California,Berkeley were included in the program;besides,some models of CHEMKINⅢ were used.Ignition delays for premixed air NG diesel fuel at different temperatures of ignition and different equivalence ratios as well as different pressures are disposed and calculated by using the code.The variation histories of concentrations of reactions,main products and radicals as well as temperature are predicted as time goes on.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2002年第4期342-347,共6页
Journal of Combustion Science and Technology
基金
国家重点基础研究专项经费资助项目 (2 0 0 1 CB40 960 0 )
国家自然科学基金资助项目(50 0 760 4 2 )
江苏省汽车工程重点实验室开放基金资助项目 (K2 0 89)
