推进技术 ›› 2019, Vol. 40 ›› Issue (1): 206-214.

• 材料推进剂燃料 • 上一篇    下一篇

收集处理方法对含铝固体推进剂凝相燃烧产物特性影响

刘欢,刘佩进,胡松启,敖文   

  1. 西北工业大学燃烧、热结构与内流场重点实验室,陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室,陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室,陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室,陕西西安 710072
  • 发布日期:2021-08-15
  • 作者简介:刘欢,博士生,研。究领域为航空宇航推进理论与工程。 E-mail: liuhuanspace@mail.nwpu.edn.cn 通讯作者:敖文,博士,副教授,研究领域为金属燃料燃烧机理和固体发动机燃烧不稳定。
  • 基金资助:
    国家自然科学基金( 51506181);陕西省自然科学基金( 2018JQ5112);中央高校基本科研业务费专项资金资助(3102018ZY003)

Effects of Collection and Treatment Methods on Characteristics of Condensed Combustion Products of Aluminized Solid Propellant

  1. Science and Technology on Combustion,Internal Flow and Thermo-Structure Laboratory,Northwestern Polytechnical University,Xi’an 710072,China,Science and Technology on Combustion,Internal Flow and Thermo-Structure Laboratory,Northwestern Polytechnical University,Xi’an 710072,China,Science and Technology on Combustion,Internal Flow and Thermo-Structure Laboratory,Northwestern Polytechnical University,Xi’an 710072,China and Science and Technology on Combustion,Internal Flow and Thermo-Structure Laboratory,Northwestern Polytechnical University,Xi’an 710072,China
  • Published:2021-08-15

摘要: 含铝固体推进剂凝相燃烧产物特性对固体火箭发动机的燃烧效率、燃烧稳定性和绝热安全性等影响重大。为获得准确可靠的凝相燃烧产物的理化特性,利用定压燃烧装置来收集凝相燃烧产物,采用马尔文激光粒度分析仪、扫描电镜及 X射线衍射仪对产物进行表征,研究收集介质、干燥处理和超声分散对凝相燃烧产物性质的影响。结果表明,使用水收集获得的凝相燃烧产物平均粒度与氮气收集条件下相比大 60%,水收集法适用于研究推进剂近燃面凝相燃烧产物。干燥处理能保证凝相燃烧产物样品中大尺寸颗粒的有效取样,在粒度测试之前需要对样品进行干燥处理来获取准确的凝相燃烧产物粒度分布数据。超声分散会导致大颗粒团聚物含量降低,小颗粒团聚物含量升高,最终显著降低凝相燃烧产物平均粒径。粒度测试时,在 80kHz条件下,超声分散参数设定为 40 W,5 min较为合适。基于研究结果,提出了一套科学合理的凝相燃烧产物收集处理方法。

关键词: 固体推进剂;凝相燃烧产物;收集方法;粒度分布;超声分散

Abstract: The characteristics of condensed combustion products of aluminized solid propellant have pro.found influence on the combustion efficiency,combustion stability and adiabatic safety of solid rocket motor. Inorder to obtain accurate and reliable physical and chemical properties of condensed combustion products,a con. stant-pressure quench vessel was used to collect the condensed combustion products. Laser diffraction particlesize analyzer,SEM and XRD were adopted to characterize the products. The effects of collection media,dryingtreatment and ultrasonic dispersion on condensed combustion products were investigated. The results show thatthe mean size is 60% larger in the experiment with water than that with nitrogen. Using water as collection mediais more suitable for the study of condensed combustion products near propellant burning surface. The drying treat.ment can ensure the effective sampling of the large size particles,therefore the sample should be dried beforesize test in order to obtain the accurate particle size distribution data. The ultrasonic dispersion would reduce the content of large agglomerates,whereas increase the content of small agglomerates in the products,leading to asignificant decrease in the average particle size of condensed combustion products. Under a frequency of 80kHz, the most reasonable parameter of ultrasonic dispersion is supposed to be 40W,5min during size measurement. Based on the previous results,a more scientific and reasonable sequence of collecting and processing method ofcondensed combustion products is proposed.

Key words: Solid propellant;Condensed combustion products;Collection method;Particle size distribu. tion;Ultrasonic dispersion