EXPERIMENTAL STUDY AND THEORETICAL ANALYSIS ON THE COMBUSTION CHARACTERISTICS OF BASE BLEED UNIT UNDER TRANSIENT DEPRESSURIZATION
The case of transient depressurization when base bleed unit projectile flied out of gun muzzle is simulated by adopting semi-closed bomb. Different combustion behaviors of composite base bleed propellant are investigated via varying the diaphragM thickness、ignition charge mass and the nozzle diameter. The combustion behavior of base bleed propellant under rapid pressure decay condition can be classified three types according combustion state. They are stable re-ignition, oscillation combustion and irreversible extinguishment, respectively. The research result shows that the combustion behavior depends on mainly the initial pressure and the velocity rate of depressurization in the base bleed unit. Based on the theory of transient combustion, the physical and mathematic combustion models of composite base bleed propellant under transient depressurization are established. The critical definition for the three combustion behaviors and the computing function of characteristic time reflecting gas movement are obtained in the present paper.
ZHOU Yan-huang ZHANG Ling-ke YU Yong-gang
School of Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
国际会议
25th International Symposium on Ballistics(第25届国际弹道会议)
北京
英文
219-225
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）