Research on the Concoctions, Material Parameters and diesel engine performance simulation for the Blend Fuels of Ethanol and Diesel

Abstract:

Blend fuels of ethanol and diesel have an advantage of decreasing request of petroleum resource and diesel engine exhaust emissions. But the molecular polarity of ethanol and diesel are different, it’s hard to form uniform and stability blend fuels without solubilizer. First, butanol, heptanol, biodiesel and sorbitan monooleate were chosen as the solubilizers. The solubilization capacity of these solubilizers were researched. Then the experiments on the ethanol-diesel blend fuels in different ethanol volume percentages (10%, 20% and 30%) and temperatures (from 5℃ to 60℃) were conducted. The experiential formulas about density, surface tension and viscosity varied with ethanol volume percentage and temperature were generalized. Finally, the simulation research for the effect of ethanol volume percentages on the diesel engine performance was conducted. With the ethanol volume percentage increasing, the fuel atomizing process improved, wallfilm mass decreased, NOx and soot emissions decreased, engine power performance penalized, while equivalent indicated specific fuel consumption and combustion noise reduced. The comprehensive performance of the diesel engine is the best when ethanol volume percentage is 10%.