| 火箭级间冷分离过程后期阶段的耦合数值模拟 |
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| 引用本文： | 高立华,张兵,权晓波,符松.火箭级间冷分离过程后期阶段的耦合数值模拟[J].推进技术,2010,31(2):129-133,152. |
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| 作者姓名： | 高立华 张兵 权晓波 符松 |
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| 作者单位： | 1. 清华大学,航天航空学院,北京,100084
2. 北京宇航系统工程研究所,北京,100076 |
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| 基金项目： | 国家自然科学基金(90505005) |
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| 摘 要： | 多级火箭二三级级间冷分离过程后期阶段的飞行遥测数据表明,在三级火箭后封头中部存在约50kW/m2的热流峰值。由于遥测数据有限,为了弄清燃气在级间流动的机理和热流产生的原因及影响,采用Chi-mera/Overset方法并结合N-S方程和刚体动力学方程,以流动和刚体动力学耦合计算的方式对多级火箭二三级级间冷分离过程的后期阶段进行了数值模拟,研究了轴对称和三级喷管有偏转两个工况的分离特性。结果表明,轴对称工况分离过程的流场存在剧烈的振荡,而三级喷管有偏转工况分离过程的流动比较平稳,对这两种流动的成因进行了分析,并讨论了这两个工况下三级后封头附近的热环境的区别。计算结果可为级间分离段的设计提供参考。
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| 关 键 词： | 多级火箭 级间分离 Chimera/Overset方法 数值仿真 |
Coupled numerical simulation for the later period of the stage separation of a multi-stage rocket |
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| GAO Li-hu,ZHANG Bing,QUAN Xiao-bo and FU Song.Coupled numerical simulation for the later period of the stage separation of a multi-stage rocket[J].Journal of Propulsion Technology,2010,31(2):129-133,152. |
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| Authors: | GAO Li-hu ZHANG Bing QUAN Xiao-bo and FU Song |
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| Institution: | GAO Li-hua1,ZHANG Bing2,QUAN Xiao-bo2,FU Song1(1. School of Aerospace,Tsinghua Univ.,Beijing 100084,China,2. Beijing Inst. of Space System Engineering,Beijing 100076,China ) |
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| Abstract: | Telemetry data of flight showed that there was a heat flux peak value of 50kW/m2 on the midpoint of aft-dome of upper-stage during the later period of the stage separation of a multi-stage rocket. In order to investigate the flow mechanism of the stage separation and the cause and effect of the heat flux,coupled CFD and rigid body dynamics simulation by means of chimera/overset method is performed to study the dynamic and aerodynamic characteristics of the later period of the stage separation of a multi-sta... |
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| Keywords: | Multi-stage rocket Stage separation Chimera/overset method Numerical simulation |
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