Study on Emission of Dimethyl Ether Engine by Avl-fire

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Xiong, Jiangyong^1 ; Li, Chongchong^1

College of Automotive Engineering, Nanjing Vocational College of Information Technology, Nanjing

210013, China^1

关键词: Combustion characteristics;    Dimethyl ethers;    Emission of NOx;    Engine control;    FIRE softwares;    National standard;    Reasonable proportion;    Turning angles;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/4/042006/pdf
DOI  :  10.1088/1755-1315/252/4/042006

来源: IOP

【 摘 要 】

The combustion characteristics of WD615 diesel engine fuelled with dimethyl ether content of 0%, 5%, 15% and 25% were numerically simulated and analysed by AVL-FIRE software. The simulation results show that with the increase of DME content, the emission of NOx and HC in the engine exhaust is declining, while the CO is increasing. The simulation results show that when the crankshaft turning angle for 50C A and 25% dimethyl ether added, NOx decreases by 93.7%, HC decreases by 25.3%. While the CO increases a little, but it is still within the scope of the national standard. The simulation also shows that the NOx emission decreased by 49.2% when the EGR rate increased from 0 to 27.5% under n=2200r/min and Pme=0.3MPa conditions. CO increased by 70.7%; HC emissions increased by 159.7%. However, when the n=2200r/min and Pme=0.6 MPa conditions, NOx emissions decreased more obvious, CO and HC increased more obvious, but also within the scope of the national standard. Therefore, it is helpful to choose a reasonable proportion of EGR in the actual engine control.