高重频纳秒脉冲放电点火系统设计

doi:10.13229/j.cnki.jdxbgxb20191085

摘要/Abstract

摘要：

在脉冲变压器和磁压缩脉冲成型网络的基础上，设计了基于谐振充电的紧凑型高重复频率纳秒脉冲放电点火系统。通过电路仿真阐明了脉冲成型电路的工作过程和原理，电路测试结果表明：系统可以产生上升时间约20 ns、半高宽约50 ns、幅值为10 kV以上的电压脉冲，脉冲重复频率为16 kHz时能保证较好的幅值一致性。放电测试结果表明：纳秒脉冲放电产生的等离子体具有较高的亮度，脉冲重复频率为10 kHz时的10个脉冲较单脉冲放电的等离子体体积和亮度更大；使用同轴电极时，等离子体覆盖面积明显变大。定容弹点火实验表明：多脉冲放电较单脉冲放电的点火延迟明显缩短；相比于单点放电，同轴电极放电能显著缩短点火延迟。

关键词: 动力机械工程, 点火系统, 等离子体, 纳秒脉冲

Abstract:

High-frequency nanosecond pulsed discharge is an effective way to generate non-equilibrium plasma for plasma assisted ignition and combustion research. In this paper， a compact high-frequency nanosecond-pulsed ignition system is designed based on resonant charging and magnetic pulse compression. Details of the electrical architecture and working principles of the ignition system are presented. The system can produce high voltage pulses over 10 kV， with a rising time of 20 ns， and a full width at half maximum of 50 ns， at repetition rate up to 16 kHz. Test results show that 10 pulses at repetition rate of 16 kHz have larger discharge volume and higher brightness than single pulse， and the utilization of coaxial electrode enlarges the discharge volume compared with pin-to-pin electrode. The experiment results show that the ignition delay time of multi-pulse discharge is much shorter than that of single-pulse discharge， and coaxial electrode discharge can significantly shorten the ignition delay time compared to pin-to-pin electrode with the same pulse number.

Key words: power mechanical engineering, ignition system, plasma, nanosecond pulse

中图分类号:

TK413.9

赵庆武,程勇,杨雪,王宁. 高重频纳秒脉冲放电点火系统设计[J]. 吉林大学学报(工学版), 2021, 51(2): 414-421.

Qing-wu ZHAO,Yong CHENG,Xue YANG,Ning WANG. A high⁃frequency nanosecond⁃pulsed ignition system for plasma assisted ignition and combustion[J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(2): 414-421.

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参数	数值
外径/cm	4
内径/cm	2.5
截面积/cm	1.2
饱和磁感应强度/T	0.8
剩余磁感应强度/T	0.7
矫顽力/(A·m^-1)	16

器件	型号/规格	说明
S₁、S₂	FGA25N120	1200 V，25 A
D₁、D₂	FR307	1000 V，3 A
C₁	630 V/luF	CBB电容
PT磁芯	402520	超微晶1K107J
C₂、C₃	20 kV/1 nF	高压瓷片电容
D₃	CL01-12	12 kV，0.5 A

组别	电极类型	放电参数
a	单点电极	1个脉冲
b	单点电极	10 kHz，10个脉冲
c	同轴电极	10 kHz，10个脉冲
d	单点电极	16 kHz，10个脉冲
e	同轴电极	16 kHz，10个脉冲