Influence of combustion and emission characteristics on a compression ignition engine from a different generation of biodiesel

In the present study the combine effects of compression ratio and the engine load on the mixture of first, second and third generation biodiesel with diesel fuel for the assessment of piston force, sauter mean diameter, tip penetration and soot formation of a direct injection diesel engine have been analyzed numerically. The results showed that slightly higher piston force and increased with compression ratio (CR) as well as sauter mean diameter (SMD) with first, second and third generation biodiesel-diesel blend compared to diesel. Spray tip penetration (STP) was found to be slightly lower by increasing CR and higher for first, second and third generation fuels compared to diesel. An effective reduction of soot emission is observed with the biodiesel blend for Karanja by 6.1% (first generation), jatropha curcas by 25.9% (second generation) and spirulina by 5.59% (third generation) at CR17.5 but soot emission increases with increase in compression ratio.