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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) 2004 Powertrain & Fluid Systems Conference & Exhibition In SI engine experiment and modeling : [as part of Powertrain & Fluid Systems Conference & Exhibition, held October 25 - 28, 2004, in Tampa, Florida, USA]
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 modelling 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
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
SI engine experiment and modeling : [as part of Powertrain & Fluid Systems Conference & Exhibition, held October 25 - 28, 2004, in Tampa, Florida, USA]
conference name
2004 Powertrain & Fluid Systems Conference & Exhibition
external identifiers
  • scopus:84877160798
ISBN
978-0-7680-1523-2
language
English
LU publication?
yes
id
066f27d1-8fd0-4e72-af3a-2cc094299583 (old id 593954)
date added to LUP
2008-02-19 14:06:38
date last changed
2017-06-04 04:47:32
@inproceedings{066f27d1-8fd0-4e72-af3a-2cc094299583,
  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 modelling 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},
  booktitle    = {SI engine experiment and modeling : [as part of Powertrain & Fluid Systems Conference & Exhibition, held October 25 - 28, 2004, in Tampa, Florida, USA]},
  isbn         = {978-0-7680-1523-2},
  language     = {eng},
  title        = {Stochastic model for the investigation of the influence of turbulent mixing on engine knock},
  year         = {2004},
}