Advanced

Lift-Off Lengths in an Optical Heavy-Duty Engine Operated at High Load with Low and High Octane Number Fuels

Lundgren, Marcus LU ; Matamis, Alexios LU ; Wang, Zhenkan LU ; Garcia Valladolid, Pablo LU ; Richter, Mattias LU ; Andersson, Oivind LU and Andersson, Arne (2018) In SAE Technical Papers 2018-April.
Abstract

The influence of the ignition quality of diesel-and gasoline-like fuels on the lift-off length of the jet were investigated in an optical heavy duty engine. The engine was operated at a load of 22 bar IMEPg and 1200 rpm. A production type injector with standard holes were used. The lift-off length was recorded with high speed video Different injection pressures and inlet temperatures were used to affect conditions that consequently affect the lift-off length. No matter which fuel used nor injection pressure or inlet temperature, all lift-off lengths showed equal or close to equal lift-off length when stabilized. The higher octane fuel had a longer ignition delay and therefore the fuel penetrate the combustion chamber before... (More)

The influence of the ignition quality of diesel-and gasoline-like fuels on the lift-off length of the jet were investigated in an optical heavy duty engine. The engine was operated at a load of 22 bar IMEPg and 1200 rpm. A production type injector with standard holes were used. The lift-off length was recorded with high speed video Different injection pressures and inlet temperatures were used to affect conditions that consequently affect the lift-off length. No matter which fuel used nor injection pressure or inlet temperature, all lift-off lengths showed equal or close to equal lift-off length when stabilized. The higher octane fuel had a longer ignition delay and therefore the fuel penetrate the combustion chamber before auto ignition. This gave a longer lift-off length at the initial stage of combustion before reaching the same stabilized lift-off length. These results indicate that the hot combustion gases are a dominant factor to the lift-off length. Also, that possible soot reductions using high octanes fuels are feasible because of a longer ignition delay that allow more premixing, and an initially longer lift-off length due to longer penetration into the combustion chamber.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
SAE Technical Papers
volume
2018-April
publisher
Society of Automotive Engineers
external identifiers
  • scopus:85045422499
ISSN
0148-7191
DOI
10.4271/2018-01-0245
language
English
LU publication?
yes
id
7f18c1d3-9ab2-4c63-aa94-ebfbc1d771d8
date added to LUP
2018-04-24 15:22:53
date last changed
2019-10-15 06:36:27
@article{7f18c1d3-9ab2-4c63-aa94-ebfbc1d771d8,
  abstract     = {<p>The influence of the ignition quality of diesel-and gasoline-like fuels on the lift-off length of the jet were investigated in an optical heavy duty engine. The engine was operated at a load of 22 bar IMEP<sub>g</sub> and 1200 rpm. A production type injector with standard holes were used. The lift-off length was recorded with high speed video Different injection pressures and inlet temperatures were used to affect conditions that consequently affect the lift-off length. No matter which fuel used nor injection pressure or inlet temperature, all lift-off lengths showed equal or close to equal lift-off length when stabilized. The higher octane fuel had a longer ignition delay and therefore the fuel penetrate the combustion chamber before auto ignition. This gave a longer lift-off length at the initial stage of combustion before reaching the same stabilized lift-off length. These results indicate that the hot combustion gases are a dominant factor to the lift-off length. Also, that possible soot reductions using high octanes fuels are feasible because of a longer ignition delay that allow more premixing, and an initially longer lift-off length due to longer penetration into the combustion chamber.</p>},
  author       = {Lundgren, Marcus and Matamis, Alexios and Wang, Zhenkan and Garcia Valladolid, Pablo and Richter, Mattias and Andersson, Oivind and Andersson, Arne},
  issn         = {0148-7191},
  language     = {eng},
  month        = {01},
  publisher    = {Society of Automotive Engineers},
  series       = {SAE Technical Papers},
  title        = {Lift-Off Lengths in an Optical Heavy-Duty Engine Operated at High Load with Low and High Octane Number Fuels},
  url          = {http://dx.doi.org/10.4271/2018-01-0245},
  volume       = {2018-April},
  year         = {2018},
}