脉冲发动机中隔层工作过程的数值分析及试验

推进技术 ›› 2012, Vol. 33 ›› Issue (5): 790-794.

脉冲发动机中隔层工作过程的数值分析及试验

王春光,田维平,任全彬,杨德敏,陈聪

西北工业大学航天学院,陕西西安 710072;西北工业大学航天学院,陕西西安 710072;西安航天动力技术研究所,陕西西安 710025;西安航天动力技术研究所,陕西西安 710025;西安航天化学动力厂,陕西西安 710025

发布日期:2021-08-15
作者简介:王春光(1985—),男,博士,工程师,研究领域为固体火箭发动机总体研究与设计。E-mail:chencong0269@163.com

Numerical Analysis and Test on Work Process of Pulse Separation Device in Pulse Motor

College of Astronautics,Northwestern Polytechnical Univeristy, Xi′an 710072, China;College of Astronautics,Northwestern Polytechnical Univeristy, Xi′an 710072, China;Xi′an Institute of Aerospace Propulsion,Xi′an 710025,China;Xi′an Institute of Aerospace Propulsion,Xi′an 710025,China;Academy of Aerospace Solid Propulsion Technology, Xi′an 710025,China

Published:2021-08-15

摘要/Abstract

摘要： 为了实现固体火箭发动机的脉冲启动功能,设计了一种软质隔层结构(PSD),数值模拟了隔层的承压及打开过程,得到其应力应变场分布。当隔层承受来自I脉冲10MPa内压作用时,隔层及药柱的最大主应力及应变都在安全范围内,从而证明了该结构承压可靠性；利用扩展有限元XFEM技术模拟了隔层的破坏过程,隔层在II脉冲1.3MPa内压下打开,且打开形式可靠。设计了承压和打开单项试验,验证了数值模拟的准确性,并说明该结构承压、打开及密封性能均满足设计要求,隔层结构可以应用于实际的脉冲发动机之中。

关键词: 脉冲发动机;隔层;扩展有限元技术;数值仿真

Abstract: In order to achieve the pulse start of solid rocket motor,one soft pulse separation device(PSD) was designed.The process of bearing pressure and opening up was simulated,and its strain and stress distribution was obtained.When the PSD bore 10MPa pressure coming from I pulse chamber,the max stress and strain of PSD or grain were smaller than the material limits,which proved that the structure of PSD was reliable.The XFEM was used to simulate its failure process,and the PSD was opened up reliably under 1.3MPa pressure.The verification monomial test was designed to verify the accuracy of simulation,and the bearing capability and failure form of PSD were satisfied with the design requirements.The PSD can be applied to pulse motor.The simulation techniques,test methods and conclusions are useful for designing pulse solid rocket motor. 

Key words: Pulse motor; Pulse separation device;XFEM; Numerical simulation

王春光,田维平,任全彬,杨德敏,陈聪. 脉冲发动机中隔层工作过程的数值分析及试验[J]. 推进技术, 2012, 33(5): 790-794.