关键词: 颗粒;凝结;破碎;燃烧效率

Abstract: Al₂O₃ accumulation strongly influences the Al droplets combustion efficiency and mixture gas flow in the solid propellant rocket motor.Combined with Lagrange approach,Al₂O₃ accumulation model is established to simulate Al droplets combustion efficiency and flow field of the solid propellant rocket motor chamber for different initial diameter of particles by considering particles break-up.The results are close to the test which is exerted in same condition.The distribution of the particles tallies with relevant experiment phenomenon.The results show that,both temperature and Al₂O₃ smoke distribution are uniform in the motor with small particles.As particle diameter increases,layers appear in chamber radical direction.At the outlet of the motor,the combustion efficiency of the particles with small initial diameter is high.However,almost no break-up happens.As diameter increases,particles combustion efficiency decreases,and Al composition which is unburned is still high.However,particles strongly break up.

Key words: Particle;Al₂O₃ accumulation;Break-up;Combustion efficiency