Investigation of Boundary Layer Behaviour in HCCI Combustion using Chemiluminescence Imaging
(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:
https://lup.lub.lu.se/record/539526
- author
- Persson, Håkan LU ; Hildingsson, Leif LU ; Hultqvist, Anders LU ; Johansson, Bengt LU and Ruebel, Jochen
- organization
- publishing date
- 2005
- 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
- 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
- 2016-04-01 16:16:11
- date last changed
- 2022-01-28 18:28:38
@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}},
keywords = {{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}},
url = {{https://lup.lub.lu.se/search/files/4621311/626006.pdf}},
volume = {{114}},
year = {{2005}},
}