Mechanism Analysis on the Effect of High-Frequency AC Electric Field on Premixed Lean Burn Flame

doi:10.7652/xjtuxb202005002

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Mechanism Analysis on the Effect of High-Frequency AC Electric Field on Premixed Lean Burn Flame

更新时间：2025-07-09

- Mechanism Analysis on the Effect of High-Frequency AC Electric Field on Premixed Lean Burn Flame
- Vol. 54, Issue 5, Pages: 9-16+94(2020)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202005002
  CLC： TK431
- Online First：10 May 2020，
  
  Published：2020
- 稿件说明：
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Mechanism Analysis on the Effect of High-Frequency AC Electric Field on Premixed Lean Burn Flame[J]. 2020, 54(5): 9-16+94.
DOI：

Mechanism Analysis on the Effect of High-Frequency AC Electric Field on Premixed Lean Burn Flame[J]. 2020, 54(5): 9-16+94. DOI： 10.7652/xjtuxb202005002.

摘要

为了明确高频交流电场对火焰燃烧的影响机理

分别选取了初始压力为0.1、0.3、0.5 MPa的CH

/空气和初始压力为0.1 MPa的CH

/Ar预混稀燃气

通过在定容燃烧弹内的网状电极上加载幅值为5 kV、频率为15 kHz的高频交流电场

对比分析了在高频交流电场下两种预混气火焰传播特性的异同

以及不同初始压力下CH

/空气火焰传播特性的异同。结果表明:加载高频交流电场后

随着初始压力的增大

电场对CH

/空气火焰面发展的影响程度逐渐减小

平均火焰传播速度增大率逐渐减小; 随着过量空气系数的增大

加载电场后对CH

/空气火焰的拉伸作用逐渐减小

对CH

/Ar火焰的拉伸作用逐渐增大

/空气的平均火焰传播速度增大率逐渐减小

/Ar的平均火焰传播速度增大率逐渐增大

电场对两种混合气火焰传播的影响趋向相同。这说明在CH

/空气预混稀燃气中

高频交流电场影响火焰燃烧的电化学效应中电子与燃烧产物分子的振动碰撞及其后续的链式反应占据主导。在不同初始压力下

平均火焰传播速度增大率随着简化场的增大呈线性增大

说明利用简化场来衡量高频交流电场电化学效应的强弱是可行的。

Abstract

In order to clarify the affecting mechanism of high frequency AC electric field on flame combustion

two premixed lean gases including CH

/Air with the initial pressures of 0.1

0.3

0.5 MPa and CH

/Ar with the initial pressures of 0.1 MPa were selected as the research object. The high-frequency AC electric field with the amplitude of 5 kV and the frequency of 15 kH- was applied on the mesh electrodes within the combustion bomb. The flame p

ropagation characteristics of the two premixed gases under the high-frequency AC electric field and the flame propagation characteristics of CH

/Air at different initial pressures were analy-ed. The results show that the degree of influence of the electric field on the development of the CH

/Air flame surface gradually decreases

and the increase rate of average flame propagation velocity gradually decreases with the initial pressure increasing under high-frequency AC electric field. With the

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references

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