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Influence of the Velocity Near the Spark Plug on Early Flame Development

Johansson, Bengt LU (1993) SAE International Congress and Exposition In SAE Technical Paper Series
Abstract
The objective of this paper is to investigate how the

velocity and turbulence within different locations close to

the spark plug influence the combustion at individual

cycles in a SI-engine.

2-D cycle-resolved laser doppler velocimetry

(LDV) measurements have been done both inside the spark

gap and around the spark tip to extract velocity

information. The pressure in the cylinder was measured

with a piezo-electric transducer connected to an A/D-card

in a standard PC.

The velocity information was filtered to get "mean

velocity" and "turbulence". The pressure signal was used

in a one-zone heatrelease model to get different levels... (More)
The objective of this paper is to investigate how the

velocity and turbulence within different locations close to

the spark plug influence the combustion at individual

cycles in a SI-engine.

2-D cycle-resolved laser doppler velocimetry

(LDV) measurements have been done both inside the spark

gap and around the spark tip to extract velocity

information. The pressure in the cylinder was measured

with a piezo-electric transducer connected to an A/D-card

in a standard PC.

The velocity information was filtered to get "mean

velocity" and "turbulence". The pressure signal was used

in a one-zone heatrelease model to get different levels of

mass fraction burned etc.

The results show a significant influence of both the

"mean velocity" and the "turbulence" on the early part of

the combustion when the velocity was measured close to

the spark plug tip. The influence was less significant when

the velocity was measured at some distance from the

electrodes for both a pancake and a high squish

combustion chamber. The correlation between the velocity

close to the spark plug and the early flame development

showed no dependence on the air-fuel ratio and a modest

dependence on ignition timing. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
cycle-cycle variation, combustion engine, LDV, velocity measurement
in
SAE Technical Paper Series
publisher
Society of Automotive Engineers
conference name
SAE International Congress and Exposition
external identifiers
  • scopus:84877160975
ISSN
0148-7191
language
English
LU publication?
yes
id
f08eb7cf-966e-45d3-ac77-18fb527a518d (old id 574799)
date added to LUP
2008-02-04 17:43:05
date last changed
2017-05-21 04:18:13
@inproceedings{f08eb7cf-966e-45d3-ac77-18fb527a518d,
  abstract     = {The objective of this paper is to investigate how the<br/><br>
velocity and turbulence within different locations close to<br/><br>
the spark plug influence the combustion at individual<br/><br>
cycles in a SI-engine.<br/><br>
2-D cycle-resolved laser doppler velocimetry<br/><br>
(LDV) measurements have been done both inside the spark<br/><br>
gap and around the spark tip to extract velocity<br/><br>
information. The pressure in the cylinder was measured<br/><br>
with a piezo-electric transducer connected to an A/D-card<br/><br>
in a standard PC.<br/><br>
The velocity information was filtered to get "mean<br/><br>
velocity" and "turbulence". The pressure signal was used<br/><br>
in a one-zone heatrelease model to get different levels of<br/><br>
mass fraction burned etc.<br/><br>
The results show a significant influence of both the<br/><br>
"mean velocity" and the "turbulence" on the early part of<br/><br>
the combustion when the velocity was measured close to<br/><br>
the spark plug tip. The influence was less significant when<br/><br>
the velocity was measured at some distance from the<br/><br>
electrodes for both a pancake and a high squish<br/><br>
combustion chamber. The correlation between the velocity<br/><br>
close to the spark plug and the early flame development<br/><br>
showed no dependence on the air-fuel ratio and a modest<br/><br>
dependence on ignition timing.},
  author       = {Johansson, Bengt},
  booktitle    = {SAE Technical Paper Series},
  issn         = {0148-7191},
  keyword      = {cycle-cycle variation,combustion engine,LDV,velocity measurement},
  language     = {eng},
  publisher    = {Society of Automotive Engineers},
  title        = {Influence of the Velocity Near the Spark Plug on Early Flame Development},
  year         = {1993},
}