贫氧推进剂激光点火性能实验研究
本文采用CO2激光辐照实验系统，研究了在密闭燃烧室内不同环境组分和不同热流密度对NEPE推进剂点火及燃烧特性的影响，分析其点火延迟时间和火焰结构。实验证明，NEPE推进剂在不同环境组分中进行激光点火时，激光热流密度和环境中氧气含量对推进剂的点火延迟时间和火焰结构有着显著的影响。
本文还设计改进了点火试验台，实现不拆卸装置的情况下连续点燃多根药柱，且药柱能够按特定转速旋转，提高了实验效率，且具有实际意义。
关键词 NEPE推进剂 激光点火 点火延迟
毕业论文设计说明书外文摘要
Title Experimental Investigation of Laser Ignition
Characteristic of Fuel-Rich Propellant
Abstract
The study on ignition property of propellants has great significance for revealing combustion mechanism and testing ignition model,and has provided the necessary basic data for analogue simulation of combustion. In recent years, Technology of laser ignition has became a hot research project.
This article introduce CO2 laser ignition experimental system,and research on the influences of different environment component and different laser heat flux for property of ignition and combustion of NEPE propellant in closed combustion chamber,especially, analysing its ignition delay and burning rate.In order to record the process of ignition and combustion, observe its flame shape,I use the High-speed camera. Experimental data reveals that the laser heat flux and the content of oxygen in environment has great influence for ignition delay and flame structure of NEPE propellant under laser ignition.
In addition, I design and improve the experimental device,realize that ignite several propellant without disassembling the device and propellant could rotate in special rotation speed.It is meaningful and improve the efficiency.
Keywords NEPE propellant Laser ignition Ignition delay
目 次
1 绪论 1
1.1 研究背景及意义 1
1.2 NEPE推进剂概述 2
1.3 点火准则概述 2
1.4 推进剂的点火特性实验研究 3
1.5 本论文的主要研究工作 6
2 激光点火实验技术 .8
2.1 激光点火实验系统 8
2.2 燃烧室气密性测试 10
2.3 试样制备 11
2.4 环境组分调节 12
2.5 温度测量及点火燃烧过程的记录 13
3 旋转试验台的设计 .15
3.1 试验台概述 15
3.2 可调速旋转结构设计 16
3.3 多药柱连续点火结构设计 18
3.4 试验台密封设计 20
4 NEPE推进剂激光点火燃烧性能研究 .22
4.1 不同环境组分下的激光点火实验 22
4.1.1 点火延迟时间 22
4.1.2 推进剂火焰结构 23
4.1.3 推进剂火焰光强信号 26
4.2 不同热流密度下的激光点火实验 27
4.2.1 点火延迟时间 27
4.2.2 推进剂表面温度 28
结 论 30