低温下三组元固体推进剂燃烧波阵面变化规律实验研究

An in-depth understanding of the combustion performance of the propellants in low-temperature conditions and collecting the change law of combustion wavefront can porvide a significant guidance for evaluating the adaptability of the propellants in low-temperature conditions. A slit observation device that can improve the observation quality of combustion waves was designed. The rapid phothograph method was carried out to collect the combusiton process of the three-component HTPB solid propellant in normal-temperature and low-temperature conditions and the images of the combustion waves were obtained. The results show that, compared with the normal-temperature conditions, the combusiton wavefront of the propellants is unstable in low-temperature conditions. The combusiton velocity of propellant was calculated based on the images taken by the rapid photograph method, which was compared with the results of the target line method. The results show that the difference between the results from the two methods was small, and the combustion velocity in the low-temperature conditions is significantly lower than that in normal-temperature conditions. The combusiton velocity of the propellant is between 1.717~2.127mm/s in normal-temperature conditions, and is between 1.252~1.583mm/s in the low-temperature conditions.