Effect of jet-jet interactions on the liquid fuel penetration in an optical heavy-duty di diesel engine

Guillaume Lequien*, Edouard Berrocal, Yann Gallo, Augusto Themudo E Mello, Oivind Andersson, Bengt Johansson

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

The liquid phase penetration of diesel sprays under reacting conditions is measured in an optical heavy-duty Direct Injection (DI) diesel engine. Hot gas reservoirs along the diffusion flames have previously been shown to affect the liftoff length on multi hole nozzles. The aim of this study is to see if they also affect the liquid length. The inter-jet spacing is varied together with the Top Dead Center density and the inlet temperature. To avoid unwanted interferences from the natural flame luminosity the illumination wavelength is blue shifted from the black body radiation spectrum and set to 448 nm. Filtered Mie scattered light from the fuel droplets is recorded with a high speed camera. The liquid fuel penetration is evaluated from the start of injection to the quasi steady phase of the jets. Knowledge of jet-jet interaction effects is of interest for transferring fundamental understanding from combustion vessels to practical engine applications. It is found that the hot gas reservoirs do not significantly affect the liquid length. A close inter-jet spacing causes a more pronounced evaporative cooling which seems to explain the longer liquid length observed on the confined jets.

Original languageEnglish (US)
JournalSAE Technical Papers
Volume2
DOIs
StatePublished - Jan 1 2013
EventSAE 2013 World Congress and Exhibition - Detroit, MI, United States
Duration: Apr 16 2013Apr 18 2013

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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