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本文报道了一种用于气炮动态加载实验中的在线光散射测试技术。该实验技术具有技术简单、激发光源工作电压低、光源响应时间短、光源输出功率稳定的优点。利用该实验技术研究了水在多次冲击压缩过程中的相变行为,发现当水被冲击压缩到约2GPa以上时,其透明性开始下降。经分析认为水的透明性下降是由水的液-固相变引起的。
This paper reports an online light scattering measurement technique used in the dynamic loading experiments of gas cannon. The experimental technique has the advantages of simple technique, low working voltage of the excitation light source, short response time of the light source, and stable output power of the light source. The phase transition behavior of water during multiple impact compression was studied by using this experimental technique. It was found that the transparency of water began to decrease when it was compressed and impacted to about 2 GPa. The analysis suggests that the decrease of water transparency is caused by the liquid-solid phase transition of water.