单缸柴油机燃用二甲基醚及其与柴油混合燃料的仿真分析

The Simulation Analysis of DME and Its Mixture with Diesel Burning in a Single-Cylinder Diesel Engine

利用GT-Power软件,对单缸柴油机模型分别进行柴油、二甲基醚及二者混合燃料的燃烧仿真分析,主要分析了燃烧二甲基醚以及二甲基醚的质量分数分别为80%、90%、95%的D80、D90、D95 3种二甲基醚一柴油混合燃料的动力性和排放特性。结果表明:在基本保持动力性的条件下,柴油机燃用二甲基醚以及在柴油中掺入较高质量分数的二甲基醚可以降低NO_x及碳烟的排放,且混合燃料中以二甲基醚的质量分数为80%时效果最佳。

By using the GT-Power, the simulation model of a single-cylinder diesel engine was made and analyzed respectively with DME, diesel, and the mixture of both of them. The mass fraction of DME in mixture is 80%, 90%, and 95%. The results show that keeping the power performance constant, the diesel engine fueled with DME or a high mass fraction of DME could reduce NOx and soot emissions, and the mixed fuel with the mass fraction of 80% is the best.