大气压条件下高焓空气等离子体流场特性及应用

doi:10.7527/S1000-6893.2018.22132

流体力学与飞行力学

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大气压条件下高焓空气等离子体流场特性及应用

刘丽萍^1,2, 王一光², 王国林¹, 罗杰¹, 马昊军¹

1. 中国空气动力研究与发展中心超高速空气动力研究所, 绵阳 621000;
2. 西北工业大学超高温结构复合材料重点实验室, 西安 710072

收稿日期:2018-03-09 修回日期:2018-05-07 出版日期:2018-08-15 发布日期:2018-05-07
通讯作者: 王国林 E-mail:wgl65269@163.com
基金资助:
国家自然科学基金（11602289）

Characteristic and application of high enthalpy air plasma flow field under atmospheric pressure

LIU Liping^1,2, WANG Yiguang², WANG Guolin¹, LUO Jie¹, MA Haojun¹

1. Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;
2. Key Laboratory of Science and Technology on Thermostructural Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China

Received:2018-03-09 Revised:2018-05-07 Online:2018-08-15 Published:2018-05-07
Supported by:
National Natural Science Foundation of China (11602289)

摘要/Abstract

摘要： 评估和鉴定高超声速飞行器防热材料使用性能，需要在能够模拟飞行气动热环境的高焓设备中进行大量地面试验。详细介绍了一种能够运行在大气压条件下的电感耦合等离子体设备，该设备能够产生多种气体（空气、氮气、二氧化碳、氩气）的等离子体射流，运行功率范围为27~85.5 kW，最大运行效率可达77.9%。通过对30 mm的亚声速喷管出口8 mm处空气等离子体流场参数高精度重构和发射光谱测试研究，获得了气体温度和光谱发射强度沿径向的分布，等离子体的焓值范围为8.54~22.2 MJ/kg，驻点热流最高可达721 W/cm²。选定2个试验状态对典型防热材料C/SiC进行烧蚀氧化考核试验，并通过与国内外同类设备比较，表明该大气压感应耦合等离子体设备达到国际先进水平，完全具备开展高超声速飞行器防热材料性能改进地面模拟试验的能力。

关键词: 感应耦合空气等离子体炬, 大气压, 流场特性, 发射光谱, C/SiC

Abstract: To evaluate the performance of thermal protection materials of hypersonic vehicles, it is needed to conduct ground tests in the high enthalpy facilities for simulating the aerothermal environment. A new inductive coupled plasma torch facility is introduced. The facility can operate under atmospheric pressure, and can produce plasma jets of air, nitrogen, carbon dioxide and argon, with the operation power ranging from 27 to 85.5 kW, and the maximum operating efficiency being about 77.9%. The parameters of the plasma flow field at the distance 8 mm away from the subsonic nozzle exit of the width of 30 mm is characterized based on high precision diagnostic of air plasma and emission spectroscopy test. The distribution of electron temperature and spectral emission intensity along the nozzle radial direction are obtained. The torch is found to induce a total enthalpy ranging from 8.54 to 22.2 MJ/kg, and the maximum heat flux at the stagnation point reaches 721 W/cm². A comparison of our facility with similar facilities at home and abroad and ablation test of carbon fiber reinforced silicon carbide (C/SiC) under two typical test conditions show that the inductive coupled plasma torch facility can reach the international advanced level, and can be used for ground simulation tests for performance improvement of thermal protection materials of hypersonic vehicles.

Key words: inductive coupled air plasma torch, atmospheric pressure, flow field characteristic, emission spectrum, C/SiC

中图分类号:

V211.71

刘丽萍, 王一光, 王国林, 罗杰, 马昊军. 大气压条件下高焓空气等离子体流场特性及应用[J]. 航空学报, 2018, 39(8): 122132-122132.

LIU Liping, WANG Yiguang, WANG Guolin, LUO Jie, MA Haojun. Characteristic and application of high enthalpy air plasma flow field under atmospheric pressure[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(8): 122132-122132.

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

大气压条件下高焓空气等离子体流场特性及应用

Characteristic and application of high enthalpy air plasma flow field under atmospheric pressure

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