激波与固体颗粒群相互作用实验研究

为了研究FAE武器、温压武器中燃料抛撒问题，在垂直激波管里进行了气-固两相流的实验研究。主要研究激波（Ma=1．96）与3种不同堆密度的石英砂颗粒群相互作用，用高速摄影仪对颗粒在抛撒过程进行图像捕捉，得到颗粒在抛撒阶段的速度。研究颗粒群在超声速气流下的运动规律以及激波对颗粒群加速的影响规律，分析激波通过颗粒群时气-固两相流中的动力学过程。定量分析颗粒堆密度对激波的影响，得出了固体颗粒群受到激波作用后抛撒过程中纵向和横向颗粒云团体积增加，颗粒云团平均浓度减少；颗粒群的堆密度与颗粒粒径、抛撒初速度、反射激波的强度都成反相关关系。

Experimental investigation on the interaction between shock wave and solid particles

To research the problem of fuel＇s dispersal in the FAE weapons and thermo bafic bomb, corresponding experiments of compressible gas-solid two-phase flow were carried out in a vertical shock tube. We mainly focused on the interaction between shock wave （ Ma = 1.96） and three types of solid particles of different density. Photos were taken by high-speed camera during the process of particles＇ dispersal, thus the particles＇ velocity in the phase of dispersal can be obtained by analysis and contrast. The movement of particles accelerated by the supersonic flow and the influence of the shock wave on the acceleration of the particles were analyzed, and the dynamic process in gas-solid flow when shock wave passed through the particles was studied. By analysis on the impact of the particles＇ different density to the shock wave, it was found that the bulk of particles cloud increased in both longitudinal and transverse directions, which means the average concentration of the cloud is reduced. The density of particles is inverse to the particles＇ diameters, particles＇ disperse speed and the strength of the reflected shock wave.