电力科技与环保2024，Vol.40Issue(1)：18-27,10.DOI:10.19944/j.eplep.1674-8069.2024.01.003
H2与氨混燃增强火焰燃烧特性模拟研究
Simulation of enhanced mixed combustion characteristics of hydrogen and am-monia
摘要
Abstract
Hydrogen and ammonia have been widely concerned as clean energy sources,and the mixed combustion of the two can promote the application of hydrogen and ammonia in practical combustion.In this paper,a relevant reaction model is established with the help of Chemkin simulation platform,and the combustion process is simulated by Otomo mechanism with hydrogen-ammonia gas mixture as fuel and air as accelerant.The ignition delay time,laminar flow com-bustion speed,adiabatic combustion temperature,NO emission and other combustion characteristics of the mixed gas were simulated varying the equivalent ratio,initial pressure and hydrogen ratio in the fuel.Chemical kinetic analysis was carried out on the laminar flow flame structure,ROP yield of H and OH radicals and sensitivity of NO generation under different working conditions.The influencing factors and essential reasons of the combustion characteristics of hydrogen-ammonia mixed combustion were deeply investigated.The results show that pure ammonia gas has long ignition delay time,slow laminar flow combustion rate,improved combustion characteristics after hydrogen mixing,and increased the adiabatic combustion temperature of the flame,but the higher the proportion of hydrogen mixing,the more NO emission.Considering a series of combustion characteristics of hydrogen-ammonia mixed combustion and the costs and benefits of hydrogen mixing and pressurization,this paper recommends 15%hydrogen,equivalent ratio φ=1.1,and pressure P=0.2 MPa as the optimal conditions for hydrogen-ammonia mixed combustion.关键词
H2/NH3/混合燃烧/层流燃烧特性/数值模拟研究Key words
hydrogen/ammonia/mixed combustion/laminar flow combustion characteristics/numerical simulation studied分类
能源科技引用本文复制引用
赵争辉,李航锦,吴超杭,尹倩倩,王睿坤..H2与氨混燃增强火焰燃烧特性模拟研究[J].电力科技与环保,2024,40(1):18-27,10.基金项目
国家自然科学基金项目(52176105) （52176105）
河北省教育厅青年拔尖人才资助项目(BJK2022063) （BJK2022063）
