关键词: 固体火箭发动机;液体喷射;推进剂;液体雾化;推进剂熄火

Abstract: The jet velocity and evaporation rate of liquid droplets play an important role in the liquid quench proccess of solid rochet motor. In this paper,the governing equation for liquid jet velocity,and movement and evaporation of liquid droplets are deduced in terms of the condition of the apparatus used in the experimental study on liquid quench of solid rocket motor. The group of equation are solved with a numerical method to study the factors influencing the velocity and evaporation rate of liquid drops. The results are as follows, the initial jet velocity and droplet size are dependent upon injection pressure drop, surface tension and viscosity of li-quid.The environmental pressure and temperature have an important effects on the velocity of liquid droplets. The environmental temperature and eva-poration heat of liquid influence evaporation rate of liquid droplets significantly. The results mentioned above are usefull for the Selection of suitible liquid and for the design of liquid injection system to meet the requirements of liquid quench of solid rocket motor.

Key words: Solid rocket engine;liquid injection;Liquid atomization Extinguishment of propellant