| 摘要: |
| 为获得延伸喷管展开特性参数,根据实际测得的延伸锥展开各种摩擦阻力之和,利用分析力学及数值分析有关理论对延伸喷管进行展开动力学分析与计算。计算得到的展开位移和试验测得的展开位移曲线吻合,展开时间和试验值相比误差仅为4.7%。分析计算对延伸喷管技术研究具有重要参考价值,为延伸喷管展开机构的改进提供了重要的理论依据。 |
| 关键词: 固体推进剂火箭发动机 延伸喷管+ 数值仿真 性能参数 |
| DOI： |
| 分类号:V435.1 |
| 基金项目: |
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| Dynamic analysis on extendible exit cone nozzle of solid rocket motor during extending |
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YOU Jun-feng,XIAO Jin-you,ZHANG Duo,GAN Xiao-song,REN Quan-bin
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1.Coll.of Astronautics,Northwestern Polytechnical Univ.,Xi’an 710072,China;2.Coll.of Astronautics,Northwestern Polytechnical Univ.,Xi’an 710073,China;3.Coll.of Astronautics,Northwestern Polytechnical Univ.,Xi’an 710074,China;4.Shaanxi Inst.of Power Machinery,Xi’an 710025,China
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| Abstract: |
| The extending displacement,velocity and acceleration and internal pressure of the actuator of a solid rocket motor(SRM) extendible exit cone(EEC) nozzle were calculated.Firstly,the nozzle was reduced to a one degree-of-freedom dynamic system,and then the dynamic equations describing the extending process of the nozzle were derived using the theory of analytical mechanics.The equivalent axial resistance was determined through experiment. After solving the dynamic equations,these dynamic parameters were obtained,which agree well with the experiment. |
| Key words: Solid propellant rocket engine Extendible exit cone nozzle+ Numerical simulation Performance parameter |
