喷孔直径对PFI氢内燃机燃烧和排放特性的影响  

The effect of injector orifice on combustion and emission characteristics of a PFI hydrogen internal combustion engine

作　　者：张孚 杨振中[1] 靳康[1] 李丹丹[1] 孙永生[1] 

机构地区：[1]华北水利水电大学,河南郑州450045

出　　处：《汽车实用技术》2017年第1期53-55,共3页Automobile Applied Technology

摘　　要：通过对一台双孔对置式PFI氢内燃机进行三维数值模拟,对比分析了不同喷孔直径下氢内燃机混合气形成质量及缸内燃烧和排放特性。结果表明:随着喷孔直径的增加,缸内混合气均匀性系数逐渐降低,而缸内最大压力、最高温度、瞬时放热率、累积放热量和NOx排放均呈先增大后减小趋势。In this paper, based on a symmetric double injector of PFI hydrogen internal combustion engine （HICE） system. And the quality of hydrogen-air mixture, combustion and emission characteristics of hydrogen internal combustion engine under different injector orifice were analyzed by uesing 3D numerical simulation method. It was found that the uniformity coefficient of mixture decrease with the increase of injector orifice, but the maximal pressure and temperature in cylinder, rate of heat release, accumulated heat release and NOx emission increasing first and then decreasing.

关 键 词：氢内燃机 喷孔直径 燃烧 排放 

分 类 号：U467.2[机械工程—车辆工程]