Relationship between Mixture Formation and Ignition Processes in a Two-component Fuel Spray

Abstract

The aim of this paper is to investigate the relationship between fuel/air mixture formation and ignition processes of a two component fuel spray using a one-dimensional diesel spray model. The model, which was originally proposed by Musculus and Kattke, was modified in order to allow evaporation process of a transient diesel spray to be taken into account. The calculation model was validated against pressure history data measured in a combustion experiment and showed good agreement with decreased pressure in the combustion chamber which represents heat absorption process of the spray. This model was applied to predictions of mixture formation process of two-component fuels which are composed of Hexadecane(C₁₆H₃₄) and 1-methyl-naphthalene(C₁₁H₁₀). Based on the calculation results, reasons why cetane number and fuel injection duration influence the ignition delay were closely discussed.