Numerical and experimental analysis of combustion and exhaust emissions in a dual-fuel diesel/natural gas engine
Numerical and experimental analysis of combustion and exhaust emissions in a dual-fuel diesel/natural gas engine
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DOI：
10.1021/ef7004755
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发表时间：
2008-05-01
期刊：
影响因子：
5.3
通讯作者：
Scarcelli, Riccardo
中科院分区：
文献类型：
--
作者：
Cordiner, Stefano;Gambino, Michele;Scarcelli, Riccardo
柴油/天然气（NG）双燃料概念基于在柴油发动机中引入空气和NG的均匀充量。然后，通过在上止点附近直接喷射到气缸中的少量柴油的燃烧来点燃充量。这种技术可以被认为是一个有前途的和诱人的解决方案，以解决影响传统柴油发动机的颗粒物-NOx排放的权衡。本文讨论了重型柴油机转换为双燃料运行的问题。进行了实验测试，以确定发动机性能和减少废气排放。实验数据也被用来开发一个数值分析，其特征在于由混合一维（ID）-三维（3D）的方法。就三维仿真工具而言，修改后的KIVA-3V代码用于模拟发动机的整个工作循环，并代表柴油喷射和整体燃烧。
The dual-fuel diesel/natural gas (NG) concept is based on the introduction of a homogeneous charge of air and NG in a diesel engine. The charge is then ignited by the combustion of a small amount of diesel fuel directly injected into the cylinder near the top dead center. Such technology can be considered as a promising and inviting solution to address the tradeoff of particulate matter-NOx emissions affecting traditional diesel engines. In this paper the conversion of a heavy-duty diesel engine to dual-fuel operations is discussed. Experimental tests were performed to define engine performance and reduce exhaust emissions. The experimental data also were used to develop a numerical analysis, characterized by a mixed one-dimensional (ID)-three-dimensional (3D) approach. As far as 3D simulation tools are concerned, a modified version of the KIVA-3V code was used to simulate the whole working cycle of the engine and to represent diesel injection and overall combustion.