毕业论文移动版

摘要脉冲成形网络与等离子体负载的匹配程度直接关系整个电热化学发射过程的电能转换效率。本文基于电路模型、金属电爆炸模型、等离子体射流流动模型和等离子体电导率模型，对整个放电过程进行数值模拟，探讨并分析了初始放电电压、回路电感、回路电容和回路内阻四个因素对脉冲电源和等离子体负载匹配程度、能量利用率、脉宽以及最大瞬时传输功率的影响。结果表明，在一定范围内，提高初始放电电压，可以有效提高最大瞬时传输功率，系统的匹配程度会出现明显降低；提高回路电感，能量利用率逐渐提高，但系统的匹配程度会逐渐减小，输出电流脉宽逐渐增大，最大瞬时传输功率发生较快下降；提高回路电容，能量利用率缓慢降低，最大瞬时传输功率基本没有变化，输出电流脉宽也逐渐增大，匹配程度缓慢上升；回路内阻增大时，能量利用率降低较快，其他指标均缓慢变化。42454

关键词 脉冲电源 等离子体负载 匹配性 优化

毕业论文网设计说明书外文摘要

Title    Study on the electrical parameters matching between pulse forming network and plasma generator                                    

Abstract

The matching degree of the pulse forming network and the plasma load is directly related to the electric energy conversion efficiency of the electrothermal chemical launch. Based on the circuit model, a electrical explosion model, plasma jet flow model and the plasma conductivity model, this paper carried out numerical simulation of the discharge process, then investigated and analyzed how the four factors including initial discharge voltage, loop inductance, loop capacitance and loop resistance  have an affect on the matching degree of pulse power source and load, the energy utilization rate, pulse width and maximum instantaneous transmission power. It is shown that within a certain range, increasing the initial discharge voltage, can effectively improve the maximum instantaneous transmission power but system matching degree decreased obviously; if improving the loop inductance, energy utilization rate is increased gradually, but system matching degree decreases, the output current pulse width increases, the maximum instantaneous transmission power rapid decline occurs; if improving the loop capacitance, energy utilization rate reduces slowly, there is almost no change in the maximum instantaneous transmission power, output current pulse width is gradually increasing, matching degree rises slowly; with loop resistance increasing, energy utilization rate is reduced quickly, other indicators change slowly.

Keywords  pulse power supply  plasma loading  matching  optimization

 目 录

1 引言 1

1.1 课题背景及意义 1

1.2 国内外研究现状 1

1.3 本文的主要工作 2

2 系统模型 4

2.1脉冲成形网络的电路模型 4

2.2 电爆炸过程中负载电阻模型 4

2.3 等离子体射流的流动模型 6

2.4 等离子体的电导率模型 8

3 数值计算方法 12

3.1 系统电路方程的数值计算格式 12

3.2 Saha方程的迭代求解 13

3.3 计算步骤 14