Effect of AC Electric Field on Combustion Characteristics of Methane/Air Premixed Spherical Flame at High Initial Pressure

doi:10.7652/xjtuxb202003010

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Effect of AC Electric Field on Combustion Characteristics of Methane/Air Premixed Spherical Flame at High Initial Pressure

更新时间：2025-07-09

- Effect of AC Electric Field on Combustion Characteristics of Methane/Air Premixed Spherical Flame at High Initial Pressure
- Vol. 54, Issue 3, Pages: 80-87+96(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/xjtuxb202003010
  CLC： TK431
- Online First：10 March 2020，
  
  Published：2020
- 稿件说明：
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Effect of AC Electric Field on Combustion Characteristics of Methane/Air Premixed Spherical Flame at High Initial Pressure[J]. 2020, 54(3): 80-87+96.
DOI：

Effect of AC Electric Field on Combustion Characteristics of Methane/Air Premixed Spherical Flame at High Initial Pressure[J]. 2020, 54(3): 80-87+96. DOI： 10.7652/xjtuxb202003010.

摘要

为了明确在高初始压力下外加交流电场对天然气预混火焰的影响

以甲烷/空气预混的瞬态球形火焰为研究对象

利用定容燃烧弹探究了在过量空气系数为1.2、常温298 K、高初始压力300 kPa下

加载电压有效值5 kV的低频和高频交流电场对甲烷/空气预混火焰燃烧特性的影响。结果显示:低频条件(f=40

100 Hz)下

火焰传播速度分别增大17.41%、6.53%、3.99%、1.54%时

燃烧压力峰值分别增大2.06%、1.73%、1.04%、0.79%

质量燃烧率达到100%所用的时间分别缩短11.96%、10.27%、7.78%、3.74%; 高频条件(f=10

20 kHz)下

火焰传播速度分别增大13.69%、19.76%、22.21%时

燃烧压力峰值分别增大1.00%、2.37%、3.07%

质量燃烧率达到100%所用的时间分别缩短11.03%、14.94%、16.13%。对低频和高频交流电场的助燃机理——双离子风效应和电化学效应进行了具体的分析

分析结果与实验现象吻合

证明了电场助燃技术的可行性与有效性。

Abstract

To study the effect of applying AC electric field on the natural gas premixed flame at high initial pressures

we used a volume-constant combustion chamber

and the research object was a transient spherical flame of methane/air premixture

aiming at exploring the effects of low-frequency AC electric field and high-frequency AC electric field loaded with an effective voltage 5 kV on the combustion characteristics of methane/air premixed flames in the condition that excess air coefficient-=1.2

temperatureT=298 K and initial pressurep=300 kPa. The results showed that

under low frequency conditions

when the electric field frequencyf=40

100 H-

the flame propagation speeds increased by17.41%

6.53%

3.99% and 1.54%; the flame combustion pressure peak increased by2.06%

1.73%

1.04% and 0.79%; the time for the mass burning rate reaching 100% shortened by11.96%

10.27%

7.78% and 3.74%

respectively. Under high frequency conditions

when the electric field frequencyf=10

20 k

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references

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