• Title/Summary/Keyword: Ethane ignition

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Kinetics and Dynamics on Inhibition Effect of Chlorinated Hydrocarbon in Combustion Reaction: The Inhibition Effect of $CH_3Cl$ on the Ignition of $C_2H_6$ (염소계 탄화수소의 연소 억제 효과에 관한 반응속도 및 동력학 연구: $C_2H_6$ 점화 과정에서 $CH_3Cl$ 억제 효과)

  • Shin, Kuan Su;Kang, Wee Kyung;Shim, Seung Bo;Jee, Sung Bae
    • Journal of the Korean Chemical Society
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    • v.43 no.2
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    • pp.150-155
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    • 1999
  • The ignition delay times behind reflected shock waves in $C_2H_6-O_2-Ar$ systems containing $CH_3Cl$ were measured for the range of temperatures between 1270 and 1544 K. The measurements indicated that $CH_3Cl$ inhibited the ignition of ethane ignition and the inhibition effects increased with increasing $CH_3Cl$ concentration. To clarify the inhibition effects of $CH_3Cl$ from the viewpoint of the reaction mechanism, computational analyses were performed in $C_2H_6-CH_3CI-O_2-Ar$ mixtures.

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Effect of Ignition Delay Time on Autoignited Laminar Lifted Flames (자발화된 층류 부상화염에 대한 점화지연시간의 영향)

  • Choi, Byung-Chul
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.35 no.10
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    • pp.1025-1031
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    • 2011
  • Autoignition characteristic is an important parameter for designing diesel or PCCI engines. In particular, diesel spray flames are lifted from the nozzle and the initial flame is formed by an autoignition phenomenon. The lifted nature of diesel spray flames influences soot formation, since air will be entrained into the spray core by the entrainment of air between the nozzle region and the lifted flame base. The objective of the present study was to identify the effect of heat loss on the ignition delay time by adopting a coflow jet as a model problem. Methane ($CH_4$), ethylene ($C_2H_4$), ethane ($C_2H_6$), propene ($C_3H_6$), propane ($C_3H_8$), and normal butane (n-$C_4H_{10}$) fuels were injected into high temperature air, and the liftoff height was measured experimentally. As the result, a correlation was determined between the liftoff height of the autoignited lifted flame and the ignition delay time considering the heat loss to the atmosphere.

Conditional moment closure modeling in turbulent nonpremixed combustion (난류확산연소에서의 conditional moment closure modeling)

  • Huh, Kang-Yul
    • 한국연소학회:학술대회논문집
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    • 2000.12a
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    • pp.24-32
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    • 2000
  • A brief introduction is given on the conditional moment closure model for turbulent nonpremixed combustion. It is based on the transport equations derived through a rigorous mathematical procedure for the conditionally averaged quantities and appropriate modeling forms for conditional scalar dissipation rate, conditional mean velocity and reaction rate. Examples are given for prediction of NO and OH in bluffbody flames, soot distribution in jet flames and autoignition of a methane/ethane jet to predict the ignition delay with respect to initial temperature, pressure and fuel composition. Conditional averaging may also be a powerful modeling concept in other approaches involved in turbulent combustion problems in various different regimes.

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Conditional Moment Closure Modeling in Turbulent Nonpremixed Combustion (난류확산연소에서의 Conditional Moment Closure Modeling)

  • Huh, Kang-Y.
    • Journal of the Korean Society of Combustion
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    • v.5 no.2
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    • pp.9-17
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    • 2000
  • A brief introduction is given on the conditional moment closure model for turbulent nonpremixed combustion. It is based on the transport equations derived through a rigorous mathematical procedure for the conditionally averaged quantities and appropriate modeling forms for conditional scalar dissipation rate, conditional mean velocity and reaction rate. Examples are given for prediction of NO and OR in bluffbody flames, soot distribution in jet flames and autoignition of a methane/ethane jet to predict the ignition delay with respect to initial temperature, pressure and fuel composition. Conditional averaging may also be a powerful modeling concept in other approaches involved in turbulent combustion problems in various different regimes.

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