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为研究冲击波经过微米颗粒所构成的颗粒层的消波吸能特性,进行水平激波管中的平面冲击波与密实填充砂墙相互作用的试验研究。利用高速纹影拍摄系统和同步压力测量系统,捕捉到冲击波与密实填充砂墙相互作用过程中的入射激波、反射激波及透射激波等波系结构,同步测得反射激波、透射激波的压力时间曲线。通过改变砂墙厚度和砂子粒径,研究这两者对冲击波消波吸能效应的影响。结果表明,对于微米量级的砂粒,增大砂子粒径或掺入小粒径砂子,能更有效地起到消波吸能的作用。
In order to study the wave-elimination energy absorption characteristics of the shock wave through the granular layer composed of micro-particles, the experimental research on the interaction between the plane shock wave in the horizontal shock tube and the densely packed sand wall was carried out. Using high-speed schlieren photography system and synchronous pressure measurement system, the incident shock wave, reflected shock wave and transmission shock wave are captured during the interaction between shock wave and densely packed sand wall. Simultaneous measurement of reflected shock wave, transmitted shock wave Pressure time curve. By changing the thickness of the sand wall and the particle size of the sand, the impact of the two on the shock wave wave-absorbing effect is studied. The results show that for the grit on the order of microns, increasing the sand particle size or incorporating sand with small particle size can more effectively play the role of wave absorption.