| 摘要: |
| 为得到双脉冲发动机隔舱结构关键部件金属膜片适宜结构,通过圆板大挠度理论和断裂力学理论推导出金属膜片预制缺陷处应力强度因子计算公式,得到金属膜片在内压作用下的设计方法,建立了膜片破坏压强与结构尺寸之间定量关系,并通过6次膜片动态破坏单项实验验证了其正确性。在此基础上,利用缩比发动机分别开展了隔舱热流承压、热流打开、热流联合实验以进一步考核隔舱的工作特性。结果表明:所导出的金属膜片设计方法与实验结果较为一致,平均误差约4.394%,可以用于脉冲发动机膜片具体结构尺寸设计；隔舱承压、密封、打开、消融性能良好,可以较好满足双脉冲发动机使用要求。 |
| 关键词: 实验研究 设计方法 金属膜片 隔舱结构 双脉冲发动机 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Study on Metal Diaphragm of Pulse Separation Device in Dual-Pulse Solid Rocket Motor |
|
WANG Wei1, LI Jiang1, WANG Chun-guang2, TIAN Wei-ping3, REN Quan-bin2
|
|
(1.Science and Technology on Combustion, Internal Flow and Thermal-Structure Laboratory, Northwestern Polytechnical University, Xi’an 710072, China;2. Xi’an Institute of Aerospace Propulsion, Xi’an 710025, China;3. The Fourth Academy of CASC, Xi’an 710025, China)
|
| Abstract: |
| Circular plates with large deflection and fracture mechanics theory were employed to investigate calculating formula of stress intensity factor of prefab gap at the condition of inner pressure, and the relationship between the opening pressure and physical dimension of hard pulse separation device (PSD) in order to achieve the feasible configuration of metal diaphragm, which plays the important role in dual-pulse solid rocket motor. Moreover, six monomial tests of metal diaphragm were conducted to validate the computing precision of designing formula. In addition, three kinds of scale experiments, namely, the compressive, opening and associated test, were performed to explore working characters of pulse separation device. The results indicate that the error between the experimental conclusions and designing results is 4.394% and the method can be applied to confirm the physical dimension of metal diaphragm.The performances of bearing capacity,seal,working characters and ablation are demonstrated and the PSD agrees well with the requirements. |
| Key words: Experimental investigation Designing method Metal diaphragm Pulse separation device Dual-pulse motor |
