3D C/SiC复合材料喷管在小型固体火箭发动机中的烧蚀规律研究

doi:10.3724/SP.J.1077.2008.00938

无机材料学报

3D C/SiC复合材料喷管在小型固体火箭发动机中的烧蚀规律研究

陈博, 张立同, 成来飞, 栾新刚

西北工业大学超高温结构复合材料国防科技重点实验室, 西安 710072

收稿日期:2007-09-26 修回日期:2007-11-06 出版日期:2008-09-20 网络出版日期:2008-09-20

Ablation Characteristic of 3D C/SiC Composite Nozzle in a Small Solid Rocket Motor

CHEN Bo, ZHANG Li-Tong, CHENG Lai-Fei, LUAN Xin-Gang

National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi’an 710072, China

Received:2007-09-26 Revised:2007-11-06 Published:2008-09-20 Online:2008-09-20

摘要/Abstract

摘要：

采用小型固体火箭发动机研究了3D C/SiC复合材料喷管的烧蚀性能, 分析了3D C/SiC的烧蚀机理及燃气参数对烧蚀性能的影响. 结果表明, 喷管喉部线烧蚀率为0.128±0.088mm/s, 质量烧蚀率为0.166kg/(m²·s); 受喷管内燃气组分、温度、压强和流速等环境参数的影响, 3DC/SiC的烧蚀涉及不同机理的非均匀烧蚀. 喉部及其上下游过渡区域烧蚀最严重, 收敛段其次, 扩散段烧蚀最弱. 烧蚀过程是热物理化学侵蚀和机械剥蚀综合作用的结果: 涉及SiC的分解流失, SiC和碳纤维的氧化烧蚀, 还涉及低速Al₂O₃大粒子的机械化学侵蚀, 高速Al₂O₃小粒子的机械侵蚀等.

关键词: 烧蚀, C/SiC复合材料, 固体火箭发动机, 烧蚀机理

Abstract: Ablation properties of a 3D C/SiC composite nozzle were investigated by using hot-firing test in a small solid propellant
rocket motor. Ablation mechanisms of the C/SiC composites and effects of the combustion gases parameters were discussed. The results show that the linear ablation rate at the throat of the composite nozzle is 0.128±0.088mm/s, and the mass ablation rate is 0.166kg/(m²·s). Ablation behavior for the 3D C/SiC composite shows a nonuniform process, which is directly affected by the compositions, temperature, pressure and the velocity of combustion gases. The ablation in the divergent section, convergent section and the regions near the throat grows severe by degrees. Ablation mechanisms of C/SiC composite are the cooperation of thermo-physical ablation, thermo-chemical ablation and thermo-mechanical erosion, which involve the decomposition of the SiC, oxidation of the SiC and carbon fiber, as well as chemical and mechanical erosion by Al₂O₃ slags and particles, respectively.

Key words: ablation, C/SiC composites, solid rocket motor, ablation mechanisms

中图分类号:

TB332

陈博,张立同,成来飞,栾新刚. 3D C/SiC复合材料喷管在小型固体火箭发动机中的烧蚀规律研究[J]. 无机材料学报, DOI: 10.3724/SP.J.1077.2008.00938.

CHEN Bo,ZHANG Li-Tong,CHENG Lai-Fei,LUAN Xin-Gang. Ablation Characteristic of 3D C/SiC Composite Nozzle in a Small Solid Rocket Motor[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.00938.

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3D C/SiC复合材料喷管在小型固体火箭发动机中的烧蚀规律研究

Ablation Characteristic of 3D C/SiC Composite Nozzle in a Small Solid Rocket Motor

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