Development of a simulation model for compression ignition engine running with ignition improved blend

Abstract

The present work describes the thermodynamic and heat transfer models used in a computer program which simulates the diesel fuel and ignition improver blend to predict the combustion and emission characteristics of a direct injection com-pression ignition engine fuelled with ignition improver blend using classical two zone approach. One zone consists of pure air called non-burning zone and other zone consist of fuel and combustion products called burning zone. First law of thermodynamics and state equations are applied in each of the two zones to yield cylinder temperatures and cylinder pressure histories. Using the two zone com-bustion model the combustion parameters and the chemical equilibrium composi-tion were determined. To validate the model an experimental investigation has been conducted on a single cylinder direct injection Diesel engine fuelled with 12% by volume of 2-ethoxy ethanol blend with diesel fuel. addition of ignition improver blend to diesel fuel decreases the exhaust smoke and increases the thermal efficiency for the power outputs. It was observed that there is a good agreement between simulated and experimental results and the proposed model requires low computational time for a complete run.