| 水下固体火箭发动机的推力特性 |
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| 引用本文： | 唐云龙,李世鹏,刘筑,唐嘉宁,谢侃,隋欣,王宁飞.水下固体火箭发动机的推力特性[J].航空动力学报,2017,32(2):477-485. |
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| 作者姓名： | 唐云龙 李世鹏 刘筑 唐嘉宁 谢侃 隋欣 王宁飞 |
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| 作者单位： | 1.北京理工大学 宇航学院，北京 100081 |
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| 基金项目： | 国家自然科学基金（11072032） |
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| 摘 要： | 在微观层面上对火箭发动机射流结构变化对推力的影响规律进行分析研究.采用轴对称模型对不同工况下的二维发动机模型进行数值模拟，获取推力振荡曲线，并研究不同阶段的推力变化，探究推力峰值与断裂的对应关系及推力振荡幅值与频率随工作环境变化的关系.研究结果表明:推力振荡产生的原因是射流在激波诱导下产生周期性颈缩；由于胀股及回击破碎的作用，水下射流推力存在多阶频率峰值；根据胀股主要处于中频段的重要结论对前4阶频率的研究表明射流回击与胀股具有相关性.
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| 关 键 词： | 固体火箭发动机 水下燃气射流 推力 多阶振荡 回击与胀鼓 |
| 收稿时间： | 2015/6/4 0:00:00 |
Underwater thrust characteristic of solid rocket motor |
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| TANG Yun-long,LI Shi-peng,LIU Zhu,TANG Jia-ning,XIE Kan,SUI Xin,WANG Ning-fei.Underwater thrust characteristic of solid rocket motor[J].Journal of Aerospace Power,2017,32(2):477-485. |
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| Authors: | TANG Yun-long LI Shi-peng LIU Zhu TANG Jia-ning XIE Kan SUI Xin WANG Ning-fei |
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| Abstract: | The underwater performance characteristics of solid rocket motors (SRM) are different from those in the air as they are surrounded with high density medium water. In order to have a deep understanding into the performance characteristics of underwater SRM, the impact of the change of the flow structure on thrust was analyzed. A 2 D axial symmetry model was adopted to simulate underwater SRM in different working conditions, and the figures of thrust oscillations were obtained. After analyzing the changes of thrust in different stages, the relationship of thrust peak value and neck breaking was studied, and the thrust oscillation amplitude and frequency changing with working environment were studied. The research results show that the thrust oscillation occurs due to the periodic neck breaking induced by the shock wave. In addition, as a result of the action of gas bulge and back attack, the jet thrust takes on a multistage frequency and peak value. According to the conclusion that the bulges are in the middle frequency band, researches on the first four order frequency show that the gas bulge is related to the back attack. |
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| Keywords: | solid rocket motor underwater gas jet thrust multistage oscillation back attack and bulge |
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