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Investigation of Boundary Layer Behaviour in HCCI Combustion using Chemiluminescence Imaging

Persson, Håkan LU ; Hildingsson, Leif LU ; Hultqvist, Anders LU ; Johansson, Bengt LU and Ruebel, Jochen (2005) In SAE Transactions, Journal of Fuels and Lubricants 114(4). p.1358-1369
Abstract
A five-cylinder diesel engine, converted to a single

cylinder operated optical engine is run in Homogeneous

Charge Compression Ignition (HCCI) mode. A blend of

iso-octane and n-heptane is used as fuel.



An experimental study of the horizontal boundary layer

between the main combustion and the non-reacting

surface of the combustion chamber is conducted as a

function of speed, load, swirl and injection strategy. The

combustion behaviour is monitored by

chemiluminescence measurements.



For all cases an interval from -10 to 16 crank angles

after top dead center (CAD ATDC) in steps of one CAD

are studied. One... (More)
A five-cylinder diesel engine, converted to a single

cylinder operated optical engine is run in Homogeneous

Charge Compression Ignition (HCCI) mode. A blend of

iso-octane and n-heptane is used as fuel.



An experimental study of the horizontal boundary layer

between the main combustion and the non-reacting

surface of the combustion chamber is conducted as a

function of speed, load, swirl and injection strategy. The

combustion behaviour is monitored by

chemiluminescence measurements.



For all cases an interval from -10 to 16 crank angles

after top dead center (CAD ATDC) in steps of one CAD

are studied. One image-intensified camera observes the

boundary layer up close from the side through a quartz

cylinder liner while a second camera has a more global

view from below to see more large scale structure of the

combustion.



The averaged chemiluminescence intensity from the

HCCI combustion is seen to scale well with the rate of

heat release. A boundary layer is defined and studied in

detail between the main combustion volume and the

piston crown surface as a function of crank angle. The

boundary layer is found to be in the range from 2 to 4

mm for all cases by the definition used; however, the

location for the measurements becomes more and more

important as combustion becomes more

inhomogeneous. To get accurate calculations, the level

of noise must also be considered and definitions of

boundary layer thickness should not be made at to low

chemiluminescence intensity. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Heat Release, Boundary Layer, Chemiluminescence, Engine, Combustion, HCCI
in
SAE Transactions, Journal of Fuels and Lubricants
volume
114
issue
4
pages
1358 - 1369
publisher
Society of Automotive Engineers
external identifiers
  • scopus:84877452396
ISSN
0096-736X
language
English
LU publication?
yes
id
29e02b1e-ee08-433d-b124-b5bfe95aa0cd (old id 539526)
alternative location
http://www.ingentaconnect.com/search/article?author=ruebel%2C+j&year_from=2002&year_to=2007&database=0&pageSize=20&index=2
date added to LUP
2007-10-05 12:14:58
date last changed
2017-09-10 04:32:02
@article{29e02b1e-ee08-433d-b124-b5bfe95aa0cd,
  abstract     = {A five-cylinder diesel engine, converted to a single<br/><br>
cylinder operated optical engine is run in Homogeneous<br/><br>
Charge Compression Ignition (HCCI) mode. A blend of<br/><br>
iso-octane and n-heptane is used as fuel.<br/><br>
<br/><br>
An experimental study of the horizontal boundary layer<br/><br>
between the main combustion and the non-reacting<br/><br>
surface of the combustion chamber is conducted as a<br/><br>
function of speed, load, swirl and injection strategy. The<br/><br>
combustion behaviour is monitored by<br/><br>
chemiluminescence measurements.<br/><br>
<br/><br>
For all cases an interval from -10 to 16 crank angles<br/><br>
after top dead center (CAD ATDC) in steps of one CAD<br/><br>
are studied. One image-intensified camera observes the<br/><br>
boundary layer up close from the side through a quartz<br/><br>
cylinder liner while a second camera has a more global<br/><br>
view from below to see more large scale structure of the<br/><br>
combustion.<br/><br>
<br/><br>
The averaged chemiluminescence intensity from the<br/><br>
HCCI combustion is seen to scale well with the rate of<br/><br>
heat release. A boundary layer is defined and studied in<br/><br>
detail between the main combustion volume and the<br/><br>
piston crown surface as a function of crank angle. The<br/><br>
boundary layer is found to be in the range from 2 to 4<br/><br>
mm for all cases by the definition used; however, the<br/><br>
location for the measurements becomes more and more<br/><br>
important as combustion becomes more<br/><br>
inhomogeneous. To get accurate calculations, the level<br/><br>
of noise must also be considered and definitions of<br/><br>
boundary layer thickness should not be made at to low<br/><br>
chemiluminescence intensity.},
  author       = {Persson, Håkan and Hildingsson, Leif and Hultqvist, Anders and Johansson, Bengt and Ruebel, Jochen},
  issn         = {0096-736X},
  keyword      = {Heat Release,Boundary Layer,Chemiluminescence,Engine,Combustion,HCCI},
  language     = {eng},
  number       = {4},
  pages        = {1358--1369},
  publisher    = {Society of Automotive Engineers},
  series       = {SAE Transactions, Journal of Fuels and Lubricants},
  title        = {Investigation of Boundary Layer Behaviour in HCCI Combustion using Chemiluminescence Imaging},
  volume       = {114},
  year         = {2005},
}