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| 固体火箭发动机燃烧稳定性预估的三维通用计算方法 |
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谢蔚民1,2, 李江1,2, 周金仙1,2, 闵斌1,2, 赵湘恒1,2
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1.西北工业大学航天工程学院;2.上海新力动力设备研究所
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| 摘要: |
| 针对一个变截面开槽管状装药单室双推力发动机，讨论如何应用三维声学有限元分析来确定燃烧室内腔的声学特性，以及在此基础上进行发动机燃烧稳定性预估的三维计算方法，目的是为研制部门提供通用的软件。应用本文编制的计算程序进行试算的结果表明：（１）燃烧室内腔前１０阶固有振型的预估误差不大于３％；（２）该发动机的燃烧稳定性接近临界状态，与地面试车情况定性一致。最后，还就声学分析的验证，减少占用内存及计算机时，以及预估方法的进一步改进等问题做了必要的讨论。 |
| 关键词: 固体推进剂火箭发动机 燃烧稳定性 有限元法 |
| DOI： |
| 分类号:V435.12 |
| 基金项目: |
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| A VERSATILE 3-DIMENSIONAL CALCULATING METHOD OF COMBUSTION STABILITY PREDICTION FOR SOLID ROCKET MOTORS |
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XiewWeiming,Li Jiang,Zou jinxian,Minbin,Zhao Xianghen
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Shanghai Xinli Power Equipment Research institute, Shanghai,200127
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| Abstract: |
| A method of 3-dimensional acoustic finite element analysis and combustion stability prediction for a slotted-tube dual thrust solid rocket motor is presented, and a versatile computer code has been programmed. The calculating results demonstrate: (1)Calculation error for ten lower natural acoustic modes in the cavity of combustion chamber is less than 3% ; (2) Combustion stability of the motor is close to criticality, which is qualitatively consistent with results of firing tests. By the end of this paper, some problems, for example, verification of acoustic analysis,reduction of machine time and internal storage, and improvement of versatility are also discussed. |
| Key words: Solid propellant rocket engine Combustion stability Finite element method |
