基于预爆震管的旋转爆震波建立和传播过程研究

doi:10.13675/j.cnki.tjjs.200177

推进技术 ›› 2021, Vol. 42 ›› Issue (4): 826-833.DOI: 10.13675/j.cnki.tjjs.200177

基于预爆震管的旋转爆震波建立和传播过程研究

马虎¹，贾立新²，侯世卓¹，张义宁³，刘事成¹，高浩鸿¹

1.南京理工大学机械工程学院，江苏南京 210094;2.陆军装备部驻北京地区第一军代表室，北京 100042;3.北京动力机械研究所激光推进及其应用国家重点实验室，北京 100074

出版日期:2021-04-15 发布日期:2021-04-15
作者简介:马　虎，博士，副教授，研究领域为旋转爆震燃烧。E-mail：mahuokok@163.com
基金资助:
国家自然科学基金（12072163；51606100）。

Initiation and Propagation Processes of Rotating Detonation Wave Based on Pre-Detonation Tube

1.School of Mechanical and Engineering，Nanjing University of Science and Technology，Nanjing 210094，China;2.Office of the First Military Representative of the Armaments Department in Beijing，Beijing 100042，China;3.State Key Laboratory of Laser Propulsion and Application， Beijing Power Machinery Institute，Beijing 100074，China

Online:2021-04-15 Published:2021-04-15

摘要/Abstract

摘要： 为研究预爆震管点火方式下旋转爆震波的起始和传播过程，采用动态压力传感器、离子探针以及高速摄影等实验手段，分析了旋转爆震波的建立过程，探讨了预爆震管与燃烧室的相互作用，总结了预爆震管出口直径、初始填充压力以及排气时间对旋转爆震波建立和传播的影响。研究表明：由于衍射作用，从垂直安装预爆震管传出的爆震波，在燃烧室内迅速发生解耦，形成两道传播速度相同、方向相反的低速燃烧波。两道燃烧波沿燃烧室周向不断加速并对撞，对撞多次后最终发展成一道旋转爆震波。预爆震管出口直径对旋转爆震波建立时间的影响要明显大于初始填充压力的影响。增大预爆震管出口直径，可提高燃烧室内初道激波和燃烧波的强度，有利于缩短DDT时间，但由于预爆震管对旋转爆震波的传播具有一定消弱作用，旋转爆震波的平均传播速度略有减小。当预爆震管处于排气阶段时，旋转爆震波仍可稳定传播，其排气过程并不影响旋转爆震波建立时间。

关键词: 旋转爆震发动机;爆震波;预爆震管;点火;起爆;传播

Abstract: Pre-detonation tubes have become a major ignition method to start rotating detonation engine （RDE）. Dynamic pressure sensors， ion probes and high speed camera were adopted to study the initiation and propagation processes of rotating detonation wave （RDW） based on pre-detonation tube. The initiation processes of RDW and the interaction between pre-detonation tube and detonation combustor were investigated. The factors influencing the initiation and propagation processes of RDW， such as outlet diameter， initial filling pressure and exhausting time of the pre-detonation tube， were considered. Due to the diffraction， detonation wave from vertical-mounted pre-detonation tube would decouple in annular combustor. Two flame fronts with low speed， which had the same propagation velocity and the opposite direction of motion， were observed in the combustor. These two flame fronts accelerated along circumference of the combustor. Then a RDW appeared by many times collisions of flame fronts in the combustor. Compared with the initial filling pressure of pre-detonation tube， the outlet diameter had more impact on onset time of RDW. With the increase of outlet diameter， the onset time shortened because the incoming shock and flame enhanced， however， average propagation velocity of RDW decreased lightly because the pre-detonation tube could weaken the propagation of RDW. RDW still could propagate stably when the pre-detonation tube was still in the exhausting stages， and the onset time of RDW was independent of the exhausting process of pre-detonation tube.

Key words: Rotating detonation engine;Detonation wave;Pre-detonation tube;Ignition;Initiation;Propagation

马虎，贾立新，侯世卓，张义宁，刘事成，高浩鸿. 基于预爆震管的旋转爆震波建立和传播过程研究[J]. 推进技术, 2021, 42(4): 826-833.

MA Hu¹, Jia Li-xin², HOU Shi-zhuo¹, ZHANG Yi-ning³, LIU Shi-cheng¹, GAO Hao-hong¹. Initiation and Propagation Processes of Rotating Detonation Wave Based on Pre-Detonation Tube[J]. Journal of Propulsion Technology, 2021, 42(4): 826-833.

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基于预爆震管的旋转爆震波建立和传播过程研究

Initiation and Propagation Processes of Rotating Detonation Wave Based on Pre-Detonation Tube

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