摘要
根据实验装置的形状,建立了点聚焦光船喷管内部等离子体流场演化的物理和数学模型;通过数值计算,获得了内流场的压强分布、推力随时间的变化规律以及光船获得的总冲量和冲量耦合系数。计算结果表明:点火区域和总冲量随着激光脉冲能量的增大而增大,而冲量耦合系数却有所减小。
Based on the shape of the experimental setting, the physical model and the mathematical model were established for the evolvement of plasma flow field produced by a laser focusing on a sphere region. The pressure distribution of the inner flow field and the thrust change with time were computed by a CFD software. The sum of impulse achieved by the lightcraft and impulse coupling coefficient were determined. The numerical results show that the impulse is going up with the enhancement of the laser pulse energy, whereas the value of the coupling coefficient is decreased. Numerical results provide a theoretical basis for determining the laser pulse energy in experiment for the further study.
出处
《热科学与技术》
CAS
CSCD
2005年第2期183-188,共6页
Journal of Thermal Science and Technology
