不同EGR率对生物柴油发动机燃烧的数值模拟

以4100柴油发动机为研究对象,用fire软件模拟分析不同EGR对生物柴油燃烧性能和排放的影响。结果表明,应用EGR,能有效降低生物柴油发动机NOX的排放,但同时发动机的动力性和经济性会有一定幅度的下降;EGR率的增加会给柴油机的动力性、燃油消耗率、烟度的排放带来不同程度的负面影响,使柴油机的最大爆发压力及放热率峰值下降。

Numerical simulation of different EGR on biological diesel engine combustion

To actually 4100 diesel engines as the research object, analysis into the EGR on Biological diesel Engine combustion and performance using FIRE. The results show that EGR. effectively reduces the NOx emissions at the same time the engine performance and fuel economy reduces to a certain extent. The increase of the EGR rate brings negative impacts to engine power, fuel economization and FSN emission, furthermore, as a result of drop of both the maximum explosive pressure and the peak value of the heat release rate.