超高速撞击压力容器碎片云与气体介质相互作用建模研究

针对超高速撞击压力容器碎片云与气体介质相互作用问题,首先,建立了碎片云的初始模型;然后,应用气固两相流理论对碎片云与气体介质的相互作用进行分析,建立了计算模型,并通过与实验结果的比较,验证了计算模型的有效性。在此基础上,考察了弹丸直径、撞击速度及气体介质压力对碎片云与气体介质相互作用的影响。研究结果表明:碎片云的尖端速度及径向扩展速度均随着弹丸直径的增加而增加,气体冲击波强度随着弹丸直径的增加而增强;随着撞击速度及气体介质压力的增加,碎片云尖端减速运动的加速度及径向减速运动的加速度均增大,气体冲击波强度随着撞击速度及气体介质压力的增加而增强,并且衰减速度增大。

MODEL FOR THE GAS-DEBRIS CLOUDS INTERACTION PRODUCED BY HYPERVELOCITY IMPACT ON PRESSURE VESSELS

According to gas-debris clouds interaction process, The gas-debris clouds interaction process is analyzed based computational model of gas-debris clouds interaction is build. velocity and gas pressure was investigated. The result shows initial model of secondary debris is built. on gas-solid two phase flow theory. The The effects of projectile diameter, impact that the velocities of tip of debris clouds and the velocities of the extension of the debris cloud increase with an increase in projectile diameter, Shock-wave strength increases with an increase in projectile diameter. The acceleration of debris clouds deceIeration increases with an increase in impact velocity and gas pressure. The shock wave strength increases with an increase in impact velocity and gas pressure. Attenuation velocity of shock wave increases with an increase in impact velocity and gas pressure.