煤油/氧气预爆器爆震波特性研究

doi:10.13675/j.cnki.tjjs.200184

推进技术 ›› 2021, Vol. 42 ›› Issue (4): 795-804.DOI: 10.13675/j.cnki.tjjs.200184

煤油/氧气预爆器爆震波特性研究

李夏飞¹，李建中¹，金武¹，胡阁¹，袁丽²

1.南京航空航天大学能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室，江苏南京 210016;2.陆军工程大学国防工程学院，江苏南京 210007

出版日期:2021-04-15 发布日期:2021-04-15
作者简介:李夏飞，硕士生，研究领域为航空发动机燃烧理论与技术。E-mail：lxf16636195472@163.com
基金资助:
国家自然科学基金（51906106）；江苏省自然科学基金（BK20190423）；中央高校基本科研业务费资助项目（NT2019005）。

Detonation Combustion Characteristics of Kerosene/Oxygen Initiator

1.Key Laboratory of Aero-Engine Thermal Environment and Structure，Ministry of Industry and Information Technology， College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China;2.School of National Defense Engineering，The Army Engineering University of PLA，Nanjing 210007，China

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

摘要/Abstract

摘要： 为了解决液态煤油旋转爆震发动机短距离快速起爆问题，进行了煤油/氧气预爆器方案设计。此方案包括双级轴向旋流和离心喷嘴匹配方案、半圆轴向垂直预爆管和圆管切向预爆管等设计，建立了液态煤油/氧气预爆器爆震波特性试验台。探讨了不同工作时序、当量油气比、预爆管结构等对预爆器爆震燃烧特性的影响。结果表明，预爆器产生的爆震波压力达到4.0MPa以上，爆震波传播速度高于1300m/s，液态煤油/氧气最佳当量油气比存在于0.6~0.73之间一点。对比半圆轴向垂直预爆管和圆管切向预爆管，圆管模型爆震波压力明显高于半圆管模型，而传播速度却低于半圆管模型，圆管模型整体存在着前导激波的生成，而半圆管模型却在生成的爆震波后方有明显的压力波动现象。

关键词: 旋转爆震发动机;煤油/氧气预爆器;圆管切向预爆管;半圆轴向预爆管;爆震波特性

Abstract: In order to quickly initiate a liquid kerosene-fueled rotating detonation engine in a short tube， a kerosene/oxygen detonation initiator scheme was designed. This scheme includes the design of a dual-stage swirler， a centrifugal nozzle， a tangential circular chamber and an axial semi-circular chamber. In addition， to study the characteristics of detonation waves， a liquid kerosene/oxygen initiator test bench was established. The effects of timing， equivalence ratio and initiator structure on the combustion characteristics of detonation were investigated. Results show that the pressure at the outlet of the initiator can reach more than 4.0MPa. And detonation wave speed can reach more than 1300m/s. An optimal equivalence ratio was found to achieve the best detonation energy. This equivalence ratio is between 0.6~0.73. The detonation pressure obtained from the circular chamber model is significantly higher than that of the semi-circular chamber model， but the velocity is lower. The leading shock wave exists in the circular chamber structure， but the semi-circular chamber model has obvious pressure fluctuations behind the generated detonation wave.

Key words: Rotating detonation engine;Kerosene/Oxygen initiator;Tangential circular chamber;Axial semi-circular chamber;Detonation combustion characteristics

李夏飞，李建中，金武，胡阁，袁丽. 煤油/氧气预爆器爆震波特性研究[J]. 推进技术, 2021, 42(4): 795-804.

LI Xia-fei¹, LI Jian-zhong¹, JIN Wu¹, HU Ge¹, YUAN Li². Detonation Combustion Characteristics of Kerosene/Oxygen Initiator[J]. Journal of Propulsion Technology, 2021, 42(4): 795-804.

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煤油/氧气预爆器爆震波特性研究

Detonation Combustion Characteristics of Kerosene/Oxygen Initiator

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