固体推进剂燃烧气体摩尔数测试

摘要

以GJB 770B-2005方法702.1《气体比容压强传感器法》为基础,提出一种推进剂燃烧气体摩尔数的测试方法.利用高压差示扫描量热仪( HPDSC 8270)实验确定了水在不同压强下的汽化温度,通过提高测试工作温度(从室温提高到250℃)使燃烧产物中的水以气相存在,解决了原有测试方法中液体水质量单独测试引入的过程误差；实验中,冷却前后燃烧器中气体摩尔数之差为样品燃烧后气体中水和HCl的摩尔数之和；对于含硼富燃料推进剂,通过测试燃烧生成的水和HCl的摩尔数之和,能够为以实验结果为约束条件的含硼富燃料推进剂热力学计算提供必要的参数支持.%A new testing method was brought forward to test the mole number of propellents combustion gas based on the method of Gaseous Specific Vnlume Pressure Sensor ( GJB 770B-2005 ) , and water's gasification temperature under different pressures were measured with HP DSC8270. In the method,the water is gaseous by raising work temperature from room temperature to 250 ℃ , so that the process error due to liquid water used in current testing method can be avoided. The mole number of water and HC1 in the combustion gas can be tested according the difference of mole number between the hot condition and the cold condition, which may provide reference for thermodyriamic calculation for the boron based fuel-rich propellant.