强激光辐照引起的气化反冲与冲击波传播

The blow-off impulse and shock wave propagation in materials induced by high-intensity pulsed laser irradiation

1.
Institute of Engineering Physics, College of Science, National University of Defense Technology
2.
Computer Science Department, Xiangnan College

摘要: 材料在强脉冲激光辐照下，表面将出现气化反冲，从而在内部形成冲击波。文章介绍了确定靶面压力的常用定标关系，计算了铝靶和涤纶靶在激光辐照下的表面压力和冲量耦合系数；文中还对激光冲击波的传播进行了数值模拟，得到了激光冲击波的传播图像及其与激光脉宽的关系。
- 强脉冲激光；冲击波；冲量耦合系数
Abstract: When a body is irradiated by a beam of high-intensity pulsed laser, a reversed impulse will be generated on its surface, and at the same time, a shock wave will be formed and propagate inside the body. This paper proposes a formula to estimate the pressure on the surface, and the impulse coupling coefficients are obtained for aluminum and polyester targets. The propagation images of the shock wave and their relation with the pulse width of the laser are analyzed.
- high-intensity pulsed laser