Study on Initial Combustion Process in Diesel Spray Flame

- Effects of Ambient Conditions and Injection Pressure on Ignition Delay and Ignition Position -

Abstract

The purpose of this study is to obtain a detailed understanding of the process from mixture formation to ignition in the diesel spray. In this paper, the effects of ambient temperature, ambient density, and injection pressure on the ignition delay and set-off length were measured using single-hole and three-holes nozzle with cone angle. The effects of adjacent sprays on the set-off length and ignition delay were also investigated by focusing on the backflow of ambient gas. In addition, a model was developed to predict the set-off length and ignition delay from the amount of ambient gas introduced into the spray.