Effects of CO<sub>2</sub> Dilution on Methane Ignition in Moderate or Intense Low-oxygen Dilution(MILD) Combustion: A Numerical Study

曹甄俊; 朱彤

doi:10.1016/S1004-9541(11)60238-3

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Effects of CO₂ Dilution on Methane Ignition in Moderate or Intense Low-oxygen Dilution(MILD) Combustion: A Numerical Study

Updated：2026-01-06

- Effects of CO₂ Dilution on Methane Ignition in Moderate or Intense Low-oxygen Dilution(MILD) Combustion: A Numerical Study
- Chinese Journal of Chemical Engineering Vol. 20, Issue 4, Pages: 701-709(2012)
- Affiliations：
  
  1. College of Mechanical Engineering, Tongji University,Shanghai,China,200092
  2. Shanghai DFYH Tech Services Co., Ltd.,Shanghai,China,201114
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(11)60238-3
  CLC：
- Published：2012
- Accepted：
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Dilution on Methane Ignition in Moderate or Intense Low-oxygen Dilution(MILD) Combustion: A Numerical Study[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 701-709.
DOI：

Dilution on Methane Ignition in Moderate or Intense Low-oxygen Dilution(MILD) Combustion: A Numerical Study[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 701-709. DOI： 10.1016/S1004-9541(11)60238-3.

摘要

Abstract

Homogeneous mixtures of CH

/air under moderate or intense low-oxygen dilution(MILD) combustion conditions were numerically studied to clarify the fundamental effects of exhaust gas recirculation(EGR)

especially CO

in EGR gases

on ignition characteristics.Specifically

effects of CO

addition on autoignition delay time were emphasized at temperature between 1200 K and 1600 K for a wide range of the lean-to-rich equivalence ratio(0.2~2).The results showed that the ignition delay time increased with equivalence ratio or CO

dilution ratio.Furthermore

ignition delay time was seen to be exponentially related with the reciprocal of initial temperature.Special concern was given to the chemical effects of CO

on the ignition delay time.The enhancement of ignition delay time with CO

addition can be mainly ascribed to the decrease of H

O and OH radicals.The predictions of temperature profiles and mole fractions of CO and CO

were strongly related to the chemical effects of CO

.A single ignition time correlation was obtained in form of Arrhenius-type for the entire range of conditions as a function of temperature

mole fraction and O

mole fraction.This correlation could successfully capture the complex behaviors of ignition of CH

/air/CO

mixture.The results can be applied to MILD combustion as "reference time"

for example

predict ignition delay time in turbulent reacting flow.

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⁰

Effects of CO2 Dilution on Methane Ignition in Moderate or Intense Low-oxygen Dilution(MILD) Combustion: A Numerical Study

DOI：10.1016/S1004-9541(11)60238-3

摘要

Abstract

关键词

Keywords

references

Effects of CO₂ Dilution on Methane Ignition in Moderate or Intense Low-oxygen Dilution(MILD) Combustion: A Numerical Study