Title: Influence of Gasoline Spray Characteristics on Gasoline-Diesel Blend Fuel Combustion in a Compression-ignition Engine.
Authors : Joonho Jeon, Seokhwon Lee,Young Ho Seo, Hyunchul Kim, Seokjoo Kwon, Sungwook Park
Research of gasoline-diesel blend fuel has been performed to achieve high thermal efficiency and low exhaust emissions in compression-ignition (CI) engines. Different fuel properties of two fuels lead to various combustion strategies; reactivity controlled compression ignition (RCCI) mode and dual-fuel premixed compression ignition (PCI) mode. In this study, the effect of gasoline properties in gasoline-diesel blend fuel on spray and combustion characteristics was investigated by numerical approach, the KIVA-3V code. To calculate two type fuels simultaneously, the discrete multi component (DMC) model was implemented in the spray simulation and the primary reference fuels (PRFs) mechanism was used in the combustion analysis. The blended test fuel was directly injected into the cylinder and exposed at various surrounding conditions depending on injection timings. The present study shows that the volatile component in the test fuel made fuel-air mixture more homogeneous than that of neat diesel fuel and thus high thermal efficiency and low soot concentration were obtained. In addition, the multi-dimensional simulation code provided local equivalence ratio and temperature information, which shows that gasoline element in the blend fuels improved the fuel-air mixture quality and the reduction of exhausted emissions.
Date: Oct. 26, 2014 - Oct. 29, 2014
Place : Tongli Lakeview Hotel, Suzhou, China.