摘要
航空活塞发动机的排放问题始终备受关注,其燃烧室的尺寸对发动机排放性能具有一定的影响,以某航空活塞发动机为研究对象,从燃烧喷雾模型出发,利用Fire建立其燃烧室模型,在现有燃烧室几何参数的基础上提出改进,利用新的方案进行仿真分析,在某一瞬态下对比新旧方案的氮氧化合物和碳烟排放。结果表明:新的燃烧室结构下发动机氮氧化合物排放降低23%,碳烟排放降低2.8%,总体排放下降;将修正后的燃烧室装配到发动机上,经实验台架测试后,发动机功率和扭矩不变,排放物明显降低,该设计方案可行。
The emission of aero piston engines has been a focused problem.The combustion chamber size is of certain effect on engine emissions performance.A piston engine is taken as the object of study.Fire is used to establish a type of engine combustion chamber model from the perspective of combustion spray model.Improvement based on geometric parameters of existing combustion chamber are proposed;and simulation analysis is carried out under the new program;the nitrogen and oxygen compounds and carbon emissions between the old and new program are compared in a transient state.The results show that the emission of nitrogen and oxygen compounds under the new combustion chamber structure is reduced by 23%,the carbon emission is reduced by 2.8%,and the overall emission is decreased.After installing the modified combustion chamber into the engine and maintaining the engine power and torque unchanged,a reduction in emission is clearly shown,which proves that the design program is feasible.
作者
潘钟键
周凯
程立志
Pan Zhongjian;Zhou Kai;Cheng Lizhi(School of Mechanical Engineering,Changsha University,Changsha 410003,China;Aviation Institute,Sunward Intelligent Equipment Co.,Ltd.,Changsha 410100,China;College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China)
出处
《航空工程进展》
CSCD
2018年第4期611-616,共6页
Advances in Aeronautical Science and Engineering
基金
长沙市科技计划项目(K1705041)
关键词
活塞发动机
燃烧室
几何参数
排放
台架测试
piston engine
combustion chamber
geometric parameters
emission
bench test
