Influence of Flight Acceleration on Particle Trajectories in Solid Rocket Moter
Li Qiang,He Guoqiang,Hu Chunbo,Wang Guohui,Cai Timin
(Coll. Of Astronautics, Northwestern Polytechnical Univ., Xi'an, 710072)

Abstract: Using the Euler-Lagrange model, numerical simulations are carried out. Influences of different axial and transverse accelerations, drop diameter and restitution coefficient on particle concentration position, particle concentration density, particle erode angle and velocity are analysized. Results show that when the axial and transverse accelerations are equal, the maximum particle concentration density is firstly decreasing and then increasing along with the acceleration and the maximum particle concentration position moves backwards at the same time. The acceleration also has an effect on particle erode angle and velocity. With increasing drop diameter, the maximum particle concentration density is increasing, the maximum particle concentration position moves backwards. With d ecreasing restitution coefficient, the maximum particlle concentration density is increasing and the maximum particle concentration position moves forward.
Keywords: acceleration, two-phase flow, drop diameter, restitution coefficient.