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实验研究激光对液体贮箱的辐照效应时,需测量贮箱内液体的流动状态。当壳体温度不超过液体的饱和温度时,贮箱内液体为自然对流形态。利用粒子图像测速(PIV)技术,搭建了二维数字PIV系统,实现了液体平面内的速度场测量。采用粒径1~5μm、密度1.05g/cm3的空心玻璃微珠微粒做为示踪粒子;利用532nm连续波激光器和三个平凸柱透镜构建了片光系统;采用装有微透镜阵列的CCD相机记录粒子图像;利用互相关算法处理粒子图像计算速度场。将此技术应用于激光辐照液体贮箱实验之中,实验结果与数值计算结果相符较好。
Experimental study of laser irradiation of liquid storage tank effect, the need to measure the flow of liquid storage tank. When the shell temperature does not exceed the saturation temperature of the liquid, the liquid in the tank is naturally convected. Using the particle image velocimetry (PIV) technology, a two-dimensional digital PIV system was set up to measure the velocity field in the liquid plane. Hollow glass beads with particle size of 1 ~ 5μm and density of 1.05g / cm3 were used as tracer particles. The system of sheet light was constructed by using 532nm continuous wave laser and three plano-convex lenses. A micro-lens array CCD The camera records the particle image; uses the cross-correlation algorithm to process the particle image to calculate the velocity field. The technique was applied to the experiments of laser irradiated liquid storage tank. The experimental results are in good agreement with the numerical results.