氨气掺混甲醇的层流燃烧速度模拟研究  

Numerical Study on Laminar Burning Velocity of Ammonia Flame with Methanol Addition

作　　者：徐昊 王静 戴礼明[1] 何志霞 王谦[1] Xu Hao;Wang Jing;Dai Liming;He Zhixia;Wang Qian(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China;Zhen Jiang Campus,Army Military Transportation University,Zhenjiang 212003,China;Energy Research Institute,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013 [2]陆军军事交通学院镇江校区,江苏镇江212003 [3]江苏大学能源研究院,江苏镇江212013

出　　处：《内燃机学报》2024年第3期226-235,共10页Transactions of Csice

基　　金：国家自然科学基金资助项目(50576083).

摘　　要：通过数值模拟的手段研究了氨气/甲醇混合气的燃烧特征,甲醇对氨气的层流燃烧速度有着显著的促进作用.选取了文献中报道的6种机理,验证了其准确性,以此为基础开发一个简化且可靠的针对氨气/甲醇混合气燃烧的化学反应机理,该机理能够准确地预测常温条件下氨/甲醇混合气的层流燃烧速度.基于新机理对氨/甲醇混合物燃烧的反应路径分析表明,甲醇不直接参与氨氧化,而是甲醇氧化产生的甲基自由基促进了氨的脱氢.NO_(x)排放分析表明,添加60%甲醇时混合气的NO_(x)排放最高.研究通过产率分析确定了控制NO_(x)的产生和消耗的最重要的反应.Combustion characteristics of ammonia/methanol mixed gas were studied through numerical simulations to understand the significant enhancement of methanol on the laminar burning velocity of ammonia.Based on six mechanisms selected from literatures reported,a simplified and reliable chemical reaction mechanism for ammonia/methanol combustion was developed,and their accuracy was verified.This mechanism can accurately predict the laminar burning velocity of ammonia/methanol mixture at room temperature.Reaction pathway analysis based on the new mechanism for ammonia/methanol mixture combustion shows that methanol does not directly participate in ammonia oxidation but rather promotes ammonia dehydrogenation through the production of methyl radicals from methanol oxidation.NO_(x) emission analysis indicates that the addition of 60%methanol results in the highest NO_(x) emissions for the mixture gas.Yield analysis identifies the most important reactions which control the generation and consumption of NO_(x).

关 键 词：氨气与甲醇混合气 层流燃烧速度 数值计算 化学反应动力学分析 

分 类 号：TK438.9[动力工程及工程热物理—动力机械及工程]