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Flow and Temperature Distribution in an Experimental Engine: LES Studies and Thermographic Imaging

Joelsson, Tobias LU ; Yu, Rixin LU ; Bai, Xue-Song LU ; Takada, Noriyuki LU ; Sakata, Ischiro; Yanagihara, Hiromichi; Lindén, Johannes LU ; Richter, Mattias LU ; Aldén, Marcus LU and Johansson, Bengt LU (2010) In SAE Technical Paper Series
Abstract
Temperature stratification plays an important role in HCCI

combustion. The onsets of auto-ignition and combustion

duration are sensitive to the temperature field in the engine

cylinder. Numerical simulations of HCCI engine combustion

are affected by the use of wall boundary conditions,

especially the temperature condition at the cylinder and

piston walls. This paper reports on numerical studies and

experiments of the temperature field in an optical

experimental engine in motored run conditions aiming at

improved understanding of the evolution of temperature

stratification in the cylinder. The simulations were based on

Large-Eddy-Simulation... (More)
Temperature stratification plays an important role in HCCI

combustion. The onsets of auto-ignition and combustion

duration are sensitive to the temperature field in the engine

cylinder. Numerical simulations of HCCI engine combustion

are affected by the use of wall boundary conditions,

especially the temperature condition at the cylinder and

piston walls. This paper reports on numerical studies and

experiments of the temperature field in an optical

experimental engine in motored run conditions aiming at

improved understanding of the evolution of temperature

stratification in the cylinder. The simulations were based on

Large-Eddy-Simulation approach which resolves the

unsteady energetic large eddy and large scale swirl and

tumble structures. Two dimensional temperature experiments

were carried out using laser induced phosphorescence with

thermographic phosphors seeded to the gas in the cylinder.

The results revealed different mechanisms for the

development of temperature stratification: intake gas and

residual gas mixing, heat transfer in the wall boundary layer,

compression of the charge, and large scale flow transport.

The sensitivity of LES results to different wall boundary

conditions and inflow conditions was analyzed. (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
Large Eddy Simulation, HCCI, CFD
in
SAE Technical Paper Series
publisher
Society of Automotive Engineers
external identifiers
  • scopus:84877163115
ISSN
0148-7191
project
Competence Centre for Combustion Processes
language
English
LU publication?
yes
id
6ebd7300-2964-464c-8491-469bd21967a8 (old id 1887357)
alternative location
http://papers.sae.org/2010-01-2237
date added to LUP
2011-04-04 14:57:11
date last changed
2018-05-29 09:54:49
@article{6ebd7300-2964-464c-8491-469bd21967a8,
  abstract     = {Temperature stratification plays an important role in HCCI<br/><br>
combustion. The onsets of auto-ignition and combustion<br/><br>
duration are sensitive to the temperature field in the engine<br/><br>
cylinder. Numerical simulations of HCCI engine combustion<br/><br>
are affected by the use of wall boundary conditions,<br/><br>
especially the temperature condition at the cylinder and<br/><br>
piston walls. This paper reports on numerical studies and<br/><br>
experiments of the temperature field in an optical<br/><br>
experimental engine in motored run conditions aiming at<br/><br>
improved understanding of the evolution of temperature<br/><br>
stratification in the cylinder. The simulations were based on<br/><br>
Large-Eddy-Simulation approach which resolves the<br/><br>
unsteady energetic large eddy and large scale swirl and<br/><br>
tumble structures. Two dimensional temperature experiments<br/><br>
were carried out using laser induced phosphorescence with<br/><br>
thermographic phosphors seeded to the gas in the cylinder.<br/><br>
The results revealed different mechanisms for the<br/><br>
development of temperature stratification: intake gas and<br/><br>
residual gas mixing, heat transfer in the wall boundary layer,<br/><br>
compression of the charge, and large scale flow transport.<br/><br>
The sensitivity of LES results to different wall boundary<br/><br>
conditions and inflow conditions was analyzed.},
  author       = {Joelsson, Tobias and Yu, Rixin and Bai, Xue-Song and Takada, Noriyuki and Sakata, Ischiro and Yanagihara, Hiromichi and Lindén, Johannes and Richter, Mattias and Aldén, Marcus and Johansson, Bengt},
  issn         = {0148-7191},
  keyword      = {Large Eddy Simulation,HCCI,CFD},
  language     = {eng},
  publisher    = {Society of Automotive Engineers},
  series       = {SAE Technical Paper Series},
  title        = {Flow and Temperature Distribution in an Experimental Engine: LES Studies and Thermographic Imaging},
  year         = {2010},
}