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Stochastic model for the investigation of the influence of turbulent mixing on engine knock

Gogan, Adina LU ; Lehtiniemi, Harry LU ; Sundén, Bengt LU and Mauss, Fabian LU (2004) In SAE Transactions Journal of Engines 113(3). p.1594-1603
Abstract
A stochastic model based on a probability density function (PDF) was developed for the investigation of different conditions that determine knock in spark ignition (SI) engine, with focus on the turbulent mixing. The model used is based on a two-zone approach, where the burned and unburned gases are described as stochastic reactors. By using a stochastic ensemble to represent the PDF of the scalar variables associated with the burned and the unburned gases it is possible to investigate phenomena that are neglected by the regular existing models (as gas non-uniformity, turbulence mixing, or the variable gas-wall interaction). Two mixing models are implemented for describing the turbulent mixing: the deterministic interaction by exchange... (More)
A stochastic model based on a probability density function (PDF) was developed for the investigation of different conditions that determine knock in spark ignition (SI) engine, with focus on the turbulent mixing. The model used is based on a two-zone approach, where the burned and unburned gases are described as stochastic reactors. By using a stochastic ensemble to represent the PDF of the scalar variables associated with the burned and the unburned gases it is possible to investigate phenomena that are neglected by the regular existing models (as gas non-uniformity, turbulence mixing, or the variable gas-wall interaction). Two mixing models are implemented for describing the turbulent mixing: the deterministic interaction by exchange with the mean (IEM) model and the stochastic coalescence/ dispersal (C/D) model. Also, a stochastic jump process is employed for modeling the irregularities in the heat transfer. Parameter studies are carried out in order to assess the influence of the turbulence intensity and of the fluctuations in the gas - wall interactions. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
SAE Transactions Journal of Engines
volume
113
issue
3
pages
1594 - 1603
publisher
Society of Automotive Engineers
ISSN
0096-736X
language
English
LU publication?
yes
id
c5bee035-53f8-4907-b77d-a69a10f16319 (old id 586373)
alternative location
http://www.sae.org/technical/papers/2004-01-2999
date added to LUP
2016-04-01 16:52:59
date last changed
2022-01-28 22:50:19
@article{c5bee035-53f8-4907-b77d-a69a10f16319,
  abstract     = {{A stochastic model based on a probability density function (PDF) was developed for the investigation of different conditions that determine knock in spark ignition (SI) engine, with focus on the turbulent mixing. The model used is based on a two-zone approach, where the burned and unburned gases are described as stochastic reactors. By using a stochastic ensemble to represent the PDF of the scalar variables associated with the burned and the unburned gases it is possible to investigate phenomena that are neglected by the regular existing models (as gas non-uniformity, turbulence mixing, or the variable gas-wall interaction). Two mixing models are implemented for describing the turbulent mixing: the deterministic interaction by exchange with the mean (IEM) model and the stochastic coalescence/ dispersal (C/D) model. Also, a stochastic jump process is employed for modeling the irregularities in the heat transfer. Parameter studies are carried out in order to assess the influence of the turbulence intensity and of the fluctuations in the gas - wall interactions.}},
  author       = {{Gogan, Adina and Lehtiniemi, Harry and Sundén, Bengt and Mauss, Fabian}},
  issn         = {{0096-736X}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{1594--1603}},
  publisher    = {{Society of Automotive Engineers}},
  series       = {{SAE Transactions Journal of Engines}},
  title        = {{Stochastic model for the investigation of the influence of turbulent mixing on engine knock}},
  url          = {{http://www.sae.org/technical/papers/2004-01-2999}},
  volume       = {{113}},
  year         = {{2004}},
}