Radiation of Spalled Particles in Shock Layers
Radiation of Spalled Particles in Shock Layers
复制标题
激波层中剥落粒子的辐射
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
D. Driver
中科院分区：
文献类型：
--
作者：
C. Park;G. Raiche;D. Driver
为了解释在电弧喷射装置上进行的实验结果，本文从理论上研究了烧蚀碳质热屏中固体颗粒喷射到激波层中的行为。实验发现，激光束穿过烧蚀平面模型上的激波层后，在激波层中发生衰减。衰减的可能原因是由于spectrometry的固体碳颗粒的存在。固体颗粒的运动方程，占他们的蒸发，被集成为不同的组合的大小和喷射速度。假设的喷射粒子的数量和大小和喷射速度的分布是不同的，直到计算的激光束衰减模式匹配的实验数据。在电弧喷射实验中，计算出到达壁面的辐射热流高达170 W/cm ~ 2
The behavior of solid particles ejected into a shock layer from an ablating carbonaceous heat shield is investigated theoretically in order to explain the results of an experiment conducted in an arc-jet facility. The experiment found that a laser beam made to pass through the shock layer over an ablating flat-faced model is attenuated in the shock layer. The likely cause of the attenuation is the presence of solid carbon particles due to spallation. The equation of motion of the solid particles, accounting for their vaporization, is integrated for different combinations of size and ejection velocity. The assumed quantity of ejected particles and the distributions of the size and ejection velocity are varied until the calculated pattern of laser-beam attenuation matched the experimental data. The radiative heat flux reaching the wall is calculated to be up to 170 W/cm 2 in the arc-jet experiment