(2) The signal filter indicates that if the signal components away from the frequency of the detonation wave are filtered at first, there is little effect on the frequency of the detonation wave signal。 and the effect can be ignored。
(3) Through the analysis of the signal measured by two ion probe acquisition circuit, we can know the acquisition circuit 2 has better anti-interference, impact resistance, and higher signal gain。
(4) Through analysis, the measurement method of rotating detonation wave velocity is obtained。 And under the condition: the mass flow rate of H2 and Air are 2。4544g/s and 65。561g/s, equivalent ratio is 1。285, the overall temperature of the experimental is 295K, respectively by ion probe and pressure sensor measuring, the frequency of rotating detonation waves are 5904Hz and 5891Hz, the propagation velocities are 1391。1m/s and 1388。0m/s, and the relative error between them does not exceed 2%。
(5) When the equivalent ratio is about the same (near 1。61), with the continuing increase of the propellant mass flow, the frequency and propagation velocity of rotating detonation wave increase linearly in the beginning, while fluctuate up and down nearby when increasing to a stable value。
(6) By processing the data, a linear relationship is established between ion probe voltage attenuation velocity and the pressure peak of detonation wave。
Keywords: continuously rotating detonation engine; rotating detonation wave; frequency; ion probe; propagation velocity。
目 录
1 绪论 1
1。1 本文研究的背景和意义 1
1。2 爆震理论的发展历程 2
1。2。1 CJ理论 2
1。2。2 ZND模型 3
1。3 连续旋转爆震发动机的研究进展 4
1。4 基于离子电流测量技术的发展 6
1。5 本文研究的主要问题和主要内容 7
1。5。1 本文研究的主要问题 7
1。5。2 本文主要内容 7
2 基于离子电流测量原理和测量技术介绍 9
2。1 爆震波中离子的形成 9
2。1。1 燃烧中的化学电离 9
2。1。2 燃烧中的热电离 9
2。1。3 燃烧中的离子衰减 9
2。1。4 爆震燃烧中的电离 9
2。2 爆震波中离子电流的形成 10
2。3 离子电流测量原理 10
2。4 实验所用离子探针结构 11
3 实验系统介绍 13
3。1 发动机模型和起爆方式 14
3。2 燃料和氧化剂供应系统 14
3。3 测量采集和控制系统 15
3。4 实验过程 17
4 实验结果处理与分析 19
4。1 高频信号的滤波处理 19
4。2 两种不同离子探针测量电路测得的信号比较 基于等离子探针的旋转爆震波测量技术研究(2):http://www.youerw.com/jixie/lunwen_88366.html