Spray Analysis and Combustion Assessment of Diesel-LPG Fuel Blends in Compression Ignition Engine

摘要: A major challenge for internal combustion engines (ICEs), and diesel engines, in particular, is the reduction of exhaust emissions, essentially nitrogen oxides (NOx) particulate matter (PM). In this regard, potential LPG-diesel blends was evaluated work. The LPG were externally prepared by exploiting their perfect miscibility at high pressures. Two diesel-LPG mixtures with 20% 35% mass concentrations tested. terms spatial temporal evolution, spray characterization performed two pure fuel through high-speed imaging technique. behavior, engine performance emissions a test campaign carried out on single-cylinder engine. Diesel/LPG sprays penetrate less than diesel. This behavior results from lower momentum, surface tension viscosity, blend jets comparison to which guarantee greater atomization. addition tends proportionally increase cone angle, due stronger turbulent flow interaction caused by, density low flash-boiling point. Because improved atomization mixing during injection phase, have shown great reducing PM without affecting (CO2 emissions). resulted significant smoke (about 95%) similar NOx acceptable THC CO emissions. Furthermore, cetane number (CN) low-heating value (LHV) ensuring leaner air-fuel mixture, improvements efficiency, particularly higher concentration LPG.