摘要
基于化学平衡计算方法 ,提出了计算燃料燃烧热效应的新方法 .以甲烷 (CH4 )为例求解了其在不同空燃比和反应温度条件下的产物组分及浓度 .从化学热力学的角度 ,在较完整反应式的基础上 ,得到了CH4 的反应热与反应温度和过量空气系数的关系 ,从而揭示了CH4 环保、经济的燃烧条件是反应温度低于 2 40 0K ,且过量空气系数大于 1.对压缩天然气的燃烧计算和模拟结果表明 :在发动机燃烧计算和模拟中 ,采用化学平衡分析热效应处理方法比低热值定常处理方法更合理 .
Based on chemical equilibrium analysis, a new method to estimate thermal results of hydrocarbon combustion is proposed. Taking methane for example, the products and their concentrations are solved at various temperatures and air/fuel ratios. When the reactive equations have been known enough, using the method of chemical thermodynamics analysis, it is easy to get the relationships of thermal results for methane with different reactive temperatures and excessive air coefficients. The economical and lower pollution reactive conditions for methane are obtained, i.e. reactive temperature is lower than 2 400 K and excessive air coefficient is bigger than 1 0. Through computation and simulation for combustion process of compressed natural gas (CNG), it is shown that the results using chemical equilibrium method are better than those of low heat value (LHV) method in simulation and computation of an engine.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2003年第3期229-233,共5页
Journal of Xi'an Jiaotong University
基金
国家重点基础研究资助项目(2 0 0 1CB2 0 90 8)
国家自然科学基金重点资助项目 (5 0 1360 40 )
