某型喷管扩张段非正常烧蚀的成因分析 -- 西北工业大学学报,2017,35(4):561-567
论文:2017,Vol:35,Issue(4):561-567
引用本文:
孙林, 鲍福廷, 惠卫华, 王绍增, 张楠, 邓恒, 时伟, 隋九龄. 某型喷管扩张段非正常烧蚀的成因分析[J]. 西北工业大学学报
Sun Lin, Bao Futing, Hui Weihua, Wang Shaozeng, Zhang Nan, Deng Heng, Shi Wei, Sui Jiuling. Abnormal Ablation Cause Analysis at the Divergence Region of a Nozzle[J]. Northwestern polytechnical university

某型喷管扩张段非正常烧蚀的成因分析
孙林1, 鲍福廷1, 惠卫华1, 王绍增2, 张楠2, 邓恒2, 时伟3, 隋九龄4
1. 西北工业大学 航天学院, 陕西 西安 710072;
2. 西安现代控制技术研究所, 陕西 西安 710065;
3. 西安电子工程研究所, 陕西 西安 710100;
4. 中国船舶重工集团 第713研究所, 河南 郑州 450015
摘要:
针对某型喷管试车过程中出现的扩张段非正常烧蚀现象,忽略复杂的烧蚀过程,综合考虑接触热阻、摩擦热耗散过程中的能量分配以及接触对分离后的辐射传热,建立了一种满足工程要求快速分析的固体火箭发动机喷管热结构直接耦合分析方法。分析过程中,重点考察结构间隙这一鲜有讨论的问题,据此定义了2种可能导致该现象的模式,分别分析应力状态及接触对接触行为,最终排除了应力破坏模式,确定间隙烧蚀模式为主要原因。仿真结果与试车结果吻合较好,为喷管后续的改进设计提供了依据。
关键词:    火箭喷管    非正常烧蚀    结构间隙    直接耦合    破坏模式    接触行为   
Abnormal Ablation Cause Analysis at the Divergence Region of a Nozzle
Sun Lin1, Bao Futing1, Hui Weihua1, Wang Shaozeng2, Zhang Nan2, Deng Heng2, Shi Wei3, Sui Jiuling4
1. School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2. Xi'an Modern Control Technology Research Institute, Xi'an 710065, China;
3. Xi'an Electronics Engineering Research Institute, Xi'an 710100, China;
4. Seventh Thirteen Institute of China Shipbuilding Industry Corporation, Zhengzhou 450015, China
Abstract:
To research the cause of an abnormal ablation of a nozzle during testing experiment, a fast fully-coupled thermo-structural simulation method was established. This method ignored the complex ablation process and took contact heat resistance, friction heat dissipation and heat radiation between each contact pair into consideration. During analysis, the scarcely mentioned factor, structure gap was focused on. Two possible modes were defined to analysis this phenomenon. By analyzing stress status and contact status of the contact pairs, stress destruction mode was excluded. It was confirmed that the main reason was gap ablation mode. Simulation results from the proposed method indicated that it agreed well with testing experiment. This offered design basis for future improvement.
Key words:    rocket nozzles    abnormal ablation    structure gap    fully-coupled    failure modes    contact behavior   
收稿日期: 2016-10-12     修回日期:
DOI:
基金项目: 国家自然科学基金(51005179)资助
通讯作者:     Email:
作者简介: 孙林(1989—),西北工业大学博士研究生,主要从事航空宇航推进理论与工程研究。
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