论文部分内容阅读
现有漏率检测技术普遍利用示漏气体对密闭容腔的密封性能进行测试。对于贮存液体推进剂的压力容器,由于气体与液体的物性、流动状态不同,示漏气体的漏率不能等同于液体漏率,因而可能造成示漏气体漏率检测合格的产品出现推进剂漏量超标问题。基于Hagen-Poiseuille公式、理想气体状态方程、质量守恒原理和漏孔流态分析,对各种流态下的低温推进剂及气体漏率进行了理论分析,推导了低温推进剂与示漏气体间的漏率等效关系式,并针对液氧、液氢介质和氦气,开展了低温推进剂蒸汽与示漏气体的PPM浓度等效量化研究。得到的漏率等效关系式对于提高低温推进剂漏率检测工作的量化和精细化具有指导意义。
The existing leakage rate detection technology generally uses leak gas to test the sealing performance of the sealed chamber. For pressure vessels storing liquid propellants, the leak rate of the leak gas may not be equal to the liquid leak rate due to the difference of the physical property and the flow state of the gas and the liquid, which may result in the appearance of a propellant Leakage exceeded the issue. Based on the Hagen-Poiseuille formula, the ideal gas equation of state, the principle of conservation of mass, and the analysis of leak flow pattern, theoretical analysis of low temperature propellants and gas leakage rate under various flow regimes is made. And the equivalent relation of leakage rate among them, and the equivalent quantification of PPM concentration of cryogenic propellant vapor and leak gas is studied for liquid oxygen, liquid hydrogen medium and helium. The obtained leakage rate equivalent relation is of guiding significance for improving the quantification and refinement of low temperature propellant leak rate testing.