Application of zero-dimensional thermodynamic model for predicting combustion parameters of CI engine fuelled with biodiesel-diesel blends

Abstract

Biodiesel from non-edible vegetable oil seems to be a promising alternate for petro-diesel in the present energy scenario. This study analyses the experimental and theoretical effects on the blends of Bee Wax biodiesel with straight diesel on combustion parameters. A zero-dimensional mathematical model is developed to analyse the rise in in-cylinder pressure along with Wiebie’s heat release correlations, ignition delay, gas dynamics model, heat transfer model and frictional model. The combustion parameters include in-cylinder pressure rise, net heat release and rate of pressure rise are investigated and found to be higher for straight diesel and deteriorated with the increase in blends of BWB. The theoretical simulation also supports the experimental data with constant injection timing, speed and compression ratio.

Keywords

• Zero-dimensional model
• Combustion
• Heat release
• Rate of pressure rise