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Turbulent flame and mass burning rate in a spark ignition engine

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Title: Turbulent flame and mass burning rate in a spark ignition engine
Authors: Liu, Kexin1, Burluka, A.A. A.A.Burluka@leeds.ac.uk, Sheppard, C.G.W.1
Source: Fuel (0016-2361). May2013, Vol. 107, p202-208. 7p.
Subjects: Turbulence, Combustion in spark ignition engines, Acceleration (Mechanics), Parameter estimation, Sensitivity analysis, Waste gases, Mass transfer
Abstract: Abstract: Turbulent burning rates were measured in an spark-ignition engine with extensive optical access for a fairly wide range of operating conditions. Skip-fired operation was employed to eliminate the effects caused by trapped or recirculated exhaust gases. Three main stages of turbulent flame propagation in SI engines were discerned: an initial acceleration, propagation with approximately constant speed and final deceleration caused by the proximity of walls. The rate of the initial flame acceleration showed little sensitivity to the engine operating parameters if the burning rate was expressed in terms of dimensionless flame radius. Propagation at a constant burning rate occurred over most of the charge volume but only for a minor fraction of its mass; the burning rate in this regime was proportional to the turbulence root-mean-square velocity while the influence of all other relevant factors could be encapsulated in either Karlovitz stretch factor or Damkohler number. The final stage of combustion, where the burnt gas radius was within one integral length scale from the walls, was responsible for more than two-thirds of the charge mass consumption and occurred at decreasing burning rate and flame brush thickness. [Copyright &y& Elsevier]
Copyright of Fuel (0016-2361) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 86394993
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: Turbulent flame and mass burning rate in a spark ignition engine
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Kexin%22">Liu, Kexin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burluka%2C+A%2EA%2E%22">Burluka, A.A.</searchLink><i> A.A.Burluka@leeds.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Sheppard%2C+C%2EG%2EW%2E%22">Sheppard, C.G.W.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Fuel+%280016-2361%29%22">Fuel (0016-2361)</searchLink>. May2013, Vol. 107, p202-208. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink><br /><searchLink fieldCode="DE" term="%22Combustion+in+spark+ignition+engines%22">Combustion in spark ignition engines</searchLink><br /><searchLink fieldCode="DE" term="%22Acceleration+%28Mechanics%29%22">Acceleration (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Parameter+estimation%22">Parameter estimation</searchLink><br /><searchLink fieldCode="DE" term="%22Sensitivity+analysis%22">Sensitivity analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Waste+gases%22">Waste gases</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+transfer%22">Mass transfer</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: Turbulent burning rates were measured in an spark-ignition engine with extensive optical access for a fairly wide range of operating conditions. Skip-fired operation was employed to eliminate the effects caused by trapped or recirculated exhaust gases. Three main stages of turbulent flame propagation in SI engines were discerned: an initial acceleration, propagation with approximately constant speed and final deceleration caused by the proximity of walls. The rate of the initial flame acceleration showed little sensitivity to the engine operating parameters if the burning rate was expressed in terms of dimensionless flame radius. Propagation at a constant burning rate occurred over most of the charge volume but only for a minor fraction of its mass; the burning rate in this regime was proportional to the turbulence root-mean-square velocity while the influence of all other relevant factors could be encapsulated in either Karlovitz stretch factor or Damkohler number. The final stage of combustion, where the burnt gas radius was within one integral length scale from the walls, was responsible for more than two-thirds of the charge mass consumption and occurred at decreasing burning rate and flame brush thickness. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Fuel (0016-2361) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=86394993
RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.fuel.2013.01.042
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 7
        StartPage: 202
    Subjects:
      – SubjectFull: Turbulence
        Type: general
      – SubjectFull: Combustion in spark ignition engines
        Type: general
      – SubjectFull: Acceleration (Mechanics)
        Type: general
      – SubjectFull: Parameter estimation
        Type: general
      – SubjectFull: Sensitivity analysis
        Type: general
      – SubjectFull: Waste gases
        Type: general
      – SubjectFull: Mass transfer
        Type: general
    Titles:
      – TitleFull: Turbulent flame and mass burning rate in a spark ignition engine
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            NameFull: Liu, Kexin
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            NameFull: Burluka, A.A.
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            NameFull: Sheppard, C.G.W.
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            – D: 01
              M: 05
              Text: May2013
              Type: published
              Y: 2013
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              Value: 107
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            – TitleFull: Fuel (0016-2361)
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