推进技术 ›› 2017, Vol. 38 ›› Issue (1): 166-171.

• 结构 强度 可靠性 • 上一篇    下一篇

冲压发动机油箱气路系统长期贮存密封性能研究

李 嵩1,郑日恒1,2,马 刚1,齐宗满1   

  1. 中国航天科工集团三十一研究所,北京 100074,中国航天科工集团三十一研究所,北京 100074; 北京动力机械研究所 高超声速冲压发动机技术重点实验室,北京 100074,中国航天科工集团三十一研究所,北京 100074,中国航天科工集团三十一研究所,北京 100074
  • 发布日期:2021-08-15
  • 作者简介:李 嵩,男,博士生,研究领域为冲压发动机总体设计与控制规律。

Study on Sealing Performance for Gas Pressure System of Ramjet Fuel Tank in Long Term Storage

  1. The 31st Research Institute of CASIC,Beijing 100074,China,The 31st Research Institute of CASIC,Beijing 100074,China; Science and Technology on Scramjet Laboratory,Beijing Power Machinery Institute,Beijing 100074,China,The 31st Research Institute of CASIC,Beijing 100074,China and The 31st Research Institute of CASIC,Beijing 100074,China
  • Published:2021-08-15

摘要: 为了研究长期贮存对冲压发动机油箱气路系统密封性能的影响,使用流导计算公式推导得到了典型密封结构的漏率计算公式,并通过漏率定义推导得出了长期贮存压差迭代计算公式,对油箱气路系统的典型密封结构在长期贮存条件下的密封能力进行了研究。结果表明,密封结构的漏率主要受内外压差和密封具体形式的影响,现有的密封结构可以保证贮存10年后油箱内气压下降不超过原始压力的0.15‰。计算结果与试验结果的一致性很好,证明了现有油箱气路系统密封方案的合理性。

关键词: 冲压发动机;油箱;气路系统;长期贮存;密封性能;漏率

Abstract: For studying the sealing performance of the gas pressure system used in ramjet fuel tank after long term storage,leakage rate of varied sealing structures was theoretically calculated on the basis of conductance calculating formula,to study its sealing mechanisms and impacts of various negative factors. The loss pressure recurrence formula was deduced from the definition of the leakage rate to evalauate the sealing performance after long stroage. The results,which agree well with the experimental data,show that the pressure will lose no more than 0.15‰ from the initial value after 10 years. It demonstrates that the sealing performace of the current structures satisfy the requirements.

Key words: Ramjet;Fuel tank;Gas pressure system;Long term storage;Sealing performance;Leakage rate