激波驱动下固体颗粒抛撒的实验研究

Experimental Study of Solid Particles Dispersal Induced by Shock Wave

本文使用阴影照相技术、高速摄像技术及压力测试手段,实验记录和研究了激波与固体颗粒群的作用及激波作用后固体颗粒群的抛撒和云团的形成过程。结果表明:在激波与固体颗粒群作用过程中,存在着清晰的激波透射、反射及绕射现象,同时激波强度在作用后有明显的下降趋势;在固体颗粒抛撒及云团形成过程中,实验发现对同一粒径的颗粒抛撒来说,抛撒的颗粒群质量越大,云团形成的均匀性及稳定性越好,而对不同粒径的颗粒群来说,粒径越大,形成的云团集中性越强。

In this paper,interaction process between shock wave and solid particles dispersal and particle cloud formation are investigated experimentally by using shadow photograph,high speed technology and pressure measurement.Results show that during interaction,shock wave transmission,reflection and diffraction are clearly captured and shock wave intensity decreasing trend is obvious after interaction.In solid particles dispersal and cloud formation process,it is found that for particles with same grain size,the more particle group mass number,the better uniformity and stability of formed cloud.For particles with different grain size,the concentration of cloud becomes higher along with the increase of particles grain size.