吉林大学学报(工学版) ›› 2025, Vol. 55 ›› Issue (12): 3783-3792.doi: 10.13229/j.cnki.jdxbgxb.20240382

• 车辆工程·机械工程 •    

放电参数对NH3/空气混合气纳秒脉冲多通道点火特性的影响

熊勇1(),田杰1,程勇1(),赵庆武2   

  1. 1.山东大学 能源与动力工程学院,济南 250061
    2.萨里大学 机械工程科学学院,英国 吉尔福德 GU27XH
  • 收稿日期:2024-04-11 出版日期:2025-12-01 发布日期:2026-02-03
  • 通讯作者: 程勇 E-mail:1193613299@qq.com;cysgd@sdu.edu.cn
  • 作者简介:熊勇(1992-),男,博士研究生.研究方向:等离子体辅助燃烧.E-mail:1193613299@qq.com
  • 基金资助:
    国家自然科学基金项目(51976107);国家自然科学基金项目(52376118)

Effect of discharge parameters on nanosecond pulse multi⁃channel ignition characteristics of NH3/air mixture

Yong XIONG1(),Jie TIAN1,Yong CHENG1(),Qing-wu ZHAO2   

  1. 1.School of Energy and Power Engineering,Shandong University,Jinan 250061,China
    2.School of Mechanical Engineering Sciences,University of Surrey,Guildford GU27XH,UK
  • Received:2024-04-11 Online:2025-12-01 Published:2026-02-03
  • Contact: Yong CHENG E-mail:1193613299@qq.com;cysgd@sdu.edu.cn

摘要:

基于定容燃烧弹,研究了NH3/空气混合气中放电脉冲间隔和放电脉冲数对纳秒脉冲沿面介质阻挡放电(nSDBD)的放电特性和点火特性的影响规律。放电特性测试表明:nSDBD可以产生多个独立分布的放电丝,扩大了等离子体的范围;放电脉冲间隔为50 μs时,30个放电脉冲能激发约12个放电丝,其长度约14 mm。点火特性测试表明:nSDBD实现了空间多点点火效果;脉冲间隔为50 μs时,180个放电脉冲产生了6个环绕顶部电极的初始火核;NH3/空气混合气中,初始火核出现了消散的现象,使初始火核数量与稳定燃烧的火核数量不一致;随着脉冲间隔或脉冲数的增加,初始火核面积增大,并且稳定火核的数量从1个逐渐增加至6个,这有效缩短了NH3/空气混合气的着火延迟,缩短量可达30 ms,约55%;脉冲间隔和脉冲数的调整可以有效控制NH3/空气混合气的燃烧相位。

关键词: 动力机械工程, 沿面介质阻挡放电, 纳秒脉冲, 多通道点火

Abstract:

The effect of discharge pulse interval and number on the discharge and ignition characteristics of nanosecond pulse surface dielectric barrier discharge (nSDBD) in NH3/air mixture was studied. The experiment is conducted in a constant volume combustion chamber. Discharge characteristic tests show that nSDBD can generate multiple independently distributed discharge filaments, expanding the range of plasma. When using 30 pulse numbers with a pulse interval of 50 μs, at least 12 discharge filaments are excited, with filament lengths exceeding 14 mm. The ignition characteristic test shows that nSDBD has achieved spatial multi-point ignition. When the pulse interval is 50 μs, 180 discharge pulses generate 6 initial flame kernels surrounding the top electrode. In the NH3/air mixture, there is a phenomenon of initial flame kernels dissipating, resulting in a discrepancy between the number of initial flame kernels and the number of stable combustion flame kernels. As the pulse interval or pulse number increases, the area of the initial flame kernels increases, and the number of stable flame kernels gradually increases from 1 to 6. This effectively shortens the ignition delay of NH3/air mixture, with a reduction of up to 30 ms, approximately 55%. The adjustment of pulse interval and pulse number can effectively control the combustion phase of NH3/air mixture.

Key words: power mechanical engineering, surface dielectric barrier discharge, nanosecond pulsed, multi-channel ignition

中图分类号: 

  • TK411

图1

试验装置示意图"

表1

纳秒脉冲多流注放电及点火特性试验方案"

方案PI/μsPN?

放电

试验

50,60,701201.0
50100,110,140,160,1801.0

点火

试验

50100~2101.0
60100~2001.0
70100~1801.0

图2

电容充放电电流的测量值与计算值对比"

图3

图像处理流程"

图4

燃烧过程特征参数FDT与FRT (PI=50 μs, PN=180,初始压力0.1 MPa,?=1.0)"

图5

NH3/空气混合气中高频重复nSDBD多流注放电图像(PI=50 μs, PN=30)"

图6

高频nSDBD单个脉冲放电丝发展图像(PI=50 μs, PN=40, NH3/空气混合气中)"

图7

高频nSDBD放电丝数量随放电脉冲的变化(PI=50 μs, NH3/空气混合气中)"

图8

高频nSDBD放电丝长度随放电脉冲数的变化(PI=50 μs, NH3/空气混合气中)"

图9

高频nSDBD电压、电流和能量曲线(PI=50 μs, PN=30, NH3/空气混合气中)"

图10

高频nSDBD单个脉冲电压、电流、功率和能量典型曲线(PI=50 μs, NH3/空气混合气中)"

图11

高频nSDBD单脉冲放电能量特性(NH3/空气混合气中)"

图12

高频nSDBD累计能量特性(PN=30,NH3/空气混合气中)"

图13

不同脉冲间隔下火核的发展过程(PN=120,NH3/空气混合气中)"

图14

不同脉冲数下火核的发展过程(PI=50 μs, NH3/空气混合气中)"

图15

不同脉冲间隔下火核半径的发展过程(PN=120,NH3/空气混合气中)"

图16

不同脉冲数下火核半径的发展过程(PI=50μs, NH3/空气混合气中)"

图17

放电参数对FDT的影响(NH3/空气混合气中)"

图18

放电参数对FRT的影响(NH3/空气混合气中)"

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