基于滑动弧的航空发动机燃烧室头部喷雾特性

doi:10.7527/S1000-6893.2020.24308

流体力学与飞行力学

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基于滑动弧的航空发动机燃烧室头部喷雾特性

张磊¹, 于锦禄¹, 陈一¹, 胡长淮¹, 蒋永健², 田裕¹

1. 空军工程大学航空工程学院, 西安 710038;
2. 陆军航空兵研究所, 北京 101121

收稿日期:2020-05-28 修回日期:2020-07-08 发布日期:2020-08-21
通讯作者: 陈一 E-mail:chenyikgd@163.com
基金资助:
国家自然科学基金（91741112，51776223）

Spray characteristics of gliding arc discharge combustion dome of areo-engine combustors

ZHANG Lei¹, YU Jinlu¹, CHEN Yi¹, HU Changhuai¹, JIANG Yongjian², TIAN Yu¹

1. Aeronautics Engineering College, Air Force Engineering University, Xi'an 710038, China;
2. Army Aviation Research Institute, Beijing 101121, China

Received:2020-05-28 Revised:2020-07-08 Published:2020-08-21
Supported by:
National Natural Science Foundation of China (91741112, 51776223)

摘要/Abstract

摘要： 发明了航空发动机燃烧室滑动弧等离子体燃油裂解头部，并开展了燃油喷雾性能实验，实验研究了不同放电电压下滑动弧等离子体对燃油喷雾性能的影响规律。结果表明，实施滑动弧等离子体燃油裂解之后，初次雾化的燃油在高温电子的碰撞下高碳链的燃油分子被打断成低碳链的小分子，燃油的黏性力降低，雾化性能得到提升。随着放电电压的升高，燃油喷雾的雾化锥角增大，SMD平均值减小，不均匀系数下降，燃油喷雾的均匀性得到明显的改善。当入口空气流量为20 m³/h，余气系数为0.6时，未施加等离子体的燃油喷雾的雾化锥角为43°，SMD平均值为93.545 6 μm，不均匀系数为0.304，当放电电压达到200 V时，燃油喷雾的雾化锥角增大到75°，SMD平均值减小为89.690 6 μm，不均匀系数下降到0.233。

关键词: 滑动弧放电, 等离子体, 燃油裂解, 燃烧室头部, 燃油雾化

Abstract: A plasma-enhanced combustion dome is developed based on the gliding arc discharge technology in areo-engine combustors, and the effect of the gliding arc plasma on fuel spray performance at different discharge voltages is studied through fuel spray performance experiments. The application of the gliding arc plasma fuel pyrolysis technology shows that the fuel molecules of high-carbon chains are broken into small molecules of low-carbon chains under the impact of high-temperature electrons, leading to decrease in viscosity and increase in atomization performance of the fuel. With the rise of the discharge voltage, the atomization angle of the fuel increases, the SMD average value of fuel atomization decreases, and the uniformity of fuel atomization is improved. When the inlet air flow is 20 m³/h and the excess air coefficient is 0.6, the atomization cone angle of the fuel spray without applying plasma excitation is 43°, the average SMD 93.545 6 μm and the non-uniformity coefficient 0.304. When the discharge voltage reaches 200 V, the atomization cone angle of the fuel spray increases to 75°, the average value of SMD is reduced to 89.690 6 μm, and the non-uniformity coefficient drops to 0.233.

Key words: gliding arc discharge, plasma, fuel pyrolysis, combustor dome, fuel atomization

中图分类号:

V235.1

张磊, 于锦禄, 陈一, 胡长淮, 蒋永健, 田裕. 基于滑动弧的航空发动机燃烧室头部喷雾特性[J]. 航空学报, 2021, 42(3): 124308-124308.

ZHANG Lei, YU Jinlu, CHEN Yi, HU Changhuai, JIANG Yongjian, TIAN Yu. Spray characteristics of gliding arc discharge combustion dome of areo-engine combustors[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(3): 124308-124308.

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基于滑动弧的航空发动机燃烧室头部喷雾特性

Spray characteristics of gliding arc discharge combustion dome of areo-engine combustors

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