航空学报 > 2016, Vol. 37 Issue (9): 2721-2728   doi: 10.7527/S1000-6893.2015.0350

等离子体增强含硼燃气二次燃烧实验分析

张鹏1, 洪延姬1, 丁小雨1, 纪海龙2   

  1. 1. 装备学院 激光推进及其应用国家重点实验室, 北京 101416;
    2. 西北工业大学 燃烧、热结构与内流场重点实验室, 西安 710072
  • 收稿日期:2015-09-13 修回日期:2015-10-25 出版日期:2016-09-15 发布日期:2016-01-30
  • 通讯作者: 洪延姬 女, 博士, 研究员, 博士生导师。主要研究方向:先进推进技术。 Tel.: 010-66364438 E-mail: hongyanji@vip.sina.com E-mail:hongyaniji@vip.sina.com
  • 作者简介:张鹏 男, 博士研究生。主要研究方向:等离子体点火助燃技术。 E-mail: zhangpengtf@126.com
  • 基金资助:

    国家自然科学基金(11372356)

Experimental analysis on plasma assisted secondary combustion of boron-based gas

ZHANG Peng1, HONG Yanji1, DING Xiaoyu1, JI Hailong2   

  1. 1. State Key Laboratory of Laser Propulsion & Application, Equipment Academy, Beijing 101416, China;
    2. Science and Technology on Combustion, Internal Flow and Thermal-Structure Laboratory, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2015-09-13 Revised:2015-10-25 Online:2016-09-15 Published:2016-01-30
  • Supported by:

    National Natural Science Foundation of China (11372356)

摘要:

为研究等离子体助燃条件下含硼燃气在补燃室的二次燃烧特性,建立了排除来流空气掺混效应的扩散燃烧实验模型。利用高速摄影仪拍摄了含硼燃气在补燃室的火焰照片,得到了有无等离子体条件下的燃烧火焰形貌;测量了补燃室不同截面的静压和总压,分析了有无等离子体条件下含硼推进剂在固冲发动机中的燃烧效率。实验结果表明:在含硼燃气二次燃烧过程中加入等离子体炬,等离子体炬后方区域火焰更加明亮,硼燃烧更加充分;断开等离子体炬后,补燃室静压和总压出现压力突降台阶,说明加入等离子体后可以加快化学反应速率,提高含硼燃气在固冲发动机中的燃烧效率,从而提高了补燃室的压强;且放电功率越高,含硼燃气在固冲发动机中燃烧效率的增长率越高。

关键词: 等离子体炬, 固冲发动机, 硼, 补燃室, 扩散火焰

Abstract:

In order to research the influence of plasma on the secondary combustion characteristic of boron-based gas in the afterburning chamber, a diffusion combustion experimental model which can exclude the mixing effect of intake air on the boron-based gas is designed and built. The flame image of boron-based gas secondary combustion is measured by the high-speed photographic apparatus to analyze the degree of brightness of the flame and the flame shape; the total pressure and static pressure of different cross-sections in the combustion chamber are measured to analyze the combustion efficiency of boron-based propellant under the influence of plasma. The results show that when adding plasma torch at the secondary combustion of boron-based gas, the combustion efficiency of boron-based gas increases and the boron-based flame is brighter; the abrupt decrease in the total pressure and static pressure appears when turning the plasma torch off. These show that the chemical reaction rate of boron-based gas increases with plasma, and the combustion efficiency of boron-based propellant in the solid rocket ramjet increases with plasma, which leads to the increase of the total pressure and static pressure with plasma; the combustion efficiency increases with the growth of discharge plasma power.

Key words: plasma torches, ducted rocket engines, boron, afterburning chamber, diffusion flames

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