Rather M A, Wani M M. Computational study on the effects of exhaust gas recirculation on thermal and emission characteristics of HCCI diesel engine. ASE 2018; 8 (4) :2833-2839
URL:
http://ijae.iust.ac.ir/article-1-465-en.html
National Institute of Technology, Srinagar, Kashmir, J&K. INDIA
Abstract: (21477 Views)
In this paper, a computational in-cylinder analysis of HCCI diesel engine was carried out using IC Engine FORTE (ANSYS 18.2) software package. The analysis used pre-defined industry standard CHEMKIN format for specifying a chemical reaction mechanism during the combustion duration. The investigation was carried out for the effects of various EGR mass percentages on the thermal and emission characteristics of a diesel engine running on HCCI mode of combustion. It was observed that an increase in EGR concentration resulted in the decrease in peak in-cylinder pressure and temperature and it was also found that when the EGR rates were increased beyond 75% there was no combustion happening within the cylinder. A considerable decrease in the NOx emissions was found with an increase in EGR mass percentage with almost negligible values when the EGR rates were increased beyond 50%, however there was a slight increase in un-burnt hydrocarbons.