Effect of CO<sub>2</sub> Addition on Explosion and Combustion Characteristics of Hydrogen-Air Turbulent Mixtures in Confined Spaces

YANG Yilan; LI Qianqian; WANG Jing; CAO Xun; LIU Hu; HUANG Zuohua

doi:10.7652/xjtuxb202603007

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Effect of CO₂ Addition on Explosion and Combustion Characteristics of Hydrogen-Air Turbulent Mixtures in Confined Spaces

更新时间：2026-03-09

- Effect of CO₂ Addition on Explosion and Combustion Characteristics of Hydrogen-Air Turbulent Mixtures in Confined Spaces
- Journal of Xi'an Jiaotong University Vol. 60, Issue 3, Pages: 67-76(2026)
- 作者机构：
  
  西安交通大学绿色氢电全国重点实验室，710049，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202603007
  CLC： TK16
- Received：05 July 2025，
  
  Published：10 March 2026
- 稿件说明：
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YANG Yilan, LI Qianqian, WANG Jing, et al. Effect of CO₂ Addition on Explosion and Combustion Characteristics of Hydrogen-Air Turbulent Mixtures in Confined Spaces[J]. Journal of Xi'an Jiaotong University, 2026, 60(3): 67-76. DOI: 10.7652/xjtuxb202603007.
DOI：

YANG Yilan, LI Qianqian, WANG Jing, et al. Effect of CO₂ Addition on Explosion and Combustion Characteristics of Hydrogen-Air Turbulent Mixtures in Confined Spaces[J]. Journal of Xi'an Jiaotong University, 2026, 60(3): 67-76. DOI: 10.7652/xjtuxb202603007. DOI：

摘要

为探究CO

抑爆剂在实际场景中抑制氢燃爆的性能，利用定容燃烧弹开展了封闭空间中不同CO

掺混比下H

-空气-CO

湍流混合气的爆炸燃烧实验，获得了爆炸燃烧特征参数，并系统分析了CO

添加量和湍流强度对混合气的影响规律，建立了爆燃指数依赖于压力上升时间的经验公式。结果表明：随着CO

掺混比增大，火焰传播速度和混合气总能量均减小，爆炸压力和压力上升强率均显著降低，当CO

掺混比从0增加30%时，爆炸压力降低32.6%，最大压力上升速率降低77.7%；热损失基本不变，导致绝热压力与实验最大爆炸压力之差几乎不变；在当量比和CO

掺混比固定的条件下，随着湍流加剧，最大爆炸压力变化不大，而最大爆炸压力升高率明显增大，热损失减小，绝热压力与实验最大爆炸压力之间的差减小，其中，当量比为1.0、CO

掺混比为30%、湍流强度从0提升到2.715 m/s时，最大压力升高率增大179%，绝热压力与实验最大爆炸压力之间的差降低7.2%；随着湍流强度增大，CO

的抑爆性能减弱。

Abstract

To investigate the performance of CO

as a flame suppressant in practical hydrogen deflagration scenarios

experiments are conducted in a constant-volume combustion chamber to study the explosion and combustion characteristics of H

-air-CO

turbulent mixtures with varying CO

fractions in a confined space.Explosion combustion parameters are obtained

and the effects of CO

concentration and turbulence intensity are systematically analyzed.An empirical formula linking the deflagration index to pressure rise time is established.The results show that increased CO

fraction reduces both flame propagation speed and total mixture energy

leading to significant decreases in explosion pressure and pressure rise rate.When CO

fraction increases from 0% to 30%

explosion pressure decreases by 32.6%

and maximum pressure rise rate decreases by 77.7%.Heat loss remains lar

gely unchanged

resulting in negligible variation between adiabatic pressure and experimental maximum explosion pressure.Under constant equivalence ratio and CO

fraction

increased turbulence intensity has little effect on maximum explosion pressure

while the maximum pressure rise rate increases significantly

and heat loss decreases

reducing the difference between adiabatic pressure and experimental maximum explosion pressure.For example

at an equivalence ratio of 1.0 and CO

fraction of 30%

as turbulence velocity increases from 0 to 2.715 m/s

maximum pressure rise rate increases by 179%

and the difference between adiabatic pressure and experimental maximum explosion pressure decreases by 7.2%.Higher turbulence intensity weakens the flame suppression effectiveness of CO

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⁰

Effect of CO2 Addition on Explosion and Combustion Characteristics of Hydrogen-Air Turbulent Mixtures in Confined Spaces

DOI：10.7652/xjtuxb202603007

摘要

Abstract

关键词

Keywords

references

Effect of CO₂ Addition on Explosion and Combustion Characteristics of Hydrogen-Air Turbulent Mixtures in Confined Spaces