Effect of blending CO<sub>2</sub> into air on combustion characteristics of CH<sub>4</sub>

ZHANG Gaoqiang; ZHANG Tianqing; FU Zhongguang; SONG Jiasheng; GAO Yucai

doi:10.19666/j.rlfd.201911134

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Effect of blending CO₂ into air on combustion characteristics of CH₄

Thermal Power Generation Vol. 49, Issue 7, Pages: 61-68(2020)

更新时间：2025-09-28

- Effect of blending CO₂ into air on combustion characteristics of CH₄
- 作者机构：
  
  1. 华北电力大学电站设备状态检测与控制教育部重点实验室
  2. 重庆大学低品位能源利用技术及系统教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201911134
  CLC： TK224.1+1
- Published Online：27 June 2020，
  
  Published：2020
- 稿件说明：
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ZHANG Gaoqiang, ZHANG Tianqing, FU Zhongguang, et al. Effect of blending CO₂ into air on combustion characteristics of CH₄[J]. Thermal Power Generation, 2020, 49(7): 61-68.
DOI：

ZHANG Gaoqiang, ZHANG Tianqing, FU Zhongguang, et al. Effect of blending CO₂ into air on combustion characteristics of CH₄[J]. Thermal Power Generation, 2020, 49(7): 61-68. DOI： 10.19666/j.rlfd.201911134.

摘要

采用数值模拟对空气掺混CO_2后与CH_4的燃烧特性进行了研究

分析不同CO_2掺混率对燃烧室温度场、速度场及污染物NO_x排放的影响。结果表明:提高CO_2掺混率

燃烧室高温区面积减少

最高温度降低

出口温度也逐渐下降;燃烧室回流区面积减小

不同径向截面处的轴向速度峰谷差降低

平均轴向速度逐渐下降。综合空气掺混CO_2后与CH_4完全燃烧的流场特性

认为该燃烧室模型对应的最佳CO_2掺混率为10%。

Abstract

The combustion characteristics of CH_4 in atmosphere of air mixed with CO_2 were numerically studied. The effects of CO_2 mixing ratio on temperature field

velocity field and NO_x emission of the combustion chamber were investigated. The result shows that

when the CO_2 mixing rate was increased

the high temperature area in the combustion chamber reduced

the maximum temperature declined

and the temperature at outlet of the combustion chamber also decreased gradually. The recirculation area in the combustion chamber reduced

and the difference of axial velocity peaks and valleys at different radial sections reduced. The average axial velocity of the flue gas gradually decreased. By analyzing the flow field characteristics of complete combustion with CH_4 after air-mixed CO_2

it shows that 10% is the optimum CO_2 mixing rate corresponding to the combustion chamber model.

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Effect of blending CO2 into air on combustion characteristics of CH4

DOI：10.19666/j.rlfd.201911134

摘要

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Effect of blending CO₂ into air on combustion characteristics of CH₄