可视化技术在分析新型蓄冷材料——笼型化合物(Clathrate)溶解过程中的应用(二)

Visualization of the melting process of clathrate in a rectangular cell(Part 2)

运用折射率匹配 (Refractive IndexMatching)技术 ,使混浊液内部自然对流的可视化图像速度测量成为可能。但由于来自微粒子的散乱光的影响 ,所得到的速度场出现了少量的误对应现象。为了解决这个问题 ,开发了新的可视化实验组合技术———折射率匹配与激光诱导荧光法 (LIF :Laser InducedFluorescence)组合 ,利用不同种类的粒子发光波长不同的特性 ,有效地去除了微粒子的散乱光 ,获得了清晰的示踪粒子的图像。笔者将简要介绍激光诱导荧光法的工作原理及其实验结果。

Natural convection of suspension was studied experimentally using a combination technique of refractive index matching and laser induced fluorescence. Argon ion laser light sheet was used for excitation light for the tracer particles dyed with fluorescence color. The images of the fluorescent particles were captured by a CCD camera through a sharp cut filter which separates emitted fluorescence from scattered excitation light.