在新概念核反应堆堆型的研究、碎片床的冷却、石油和化学工业中的反应床中都涉及球床气液两相流。气-液两相流流型研究的首要问题是流型的观测，只有解决了这个问题，后续的流型分类、流型识别、流型与阻力特性的关系等一系列问题才能得以展开。因此，本文研究内容由可视化研究开始，通过可视化研究得到的结果来指导球床空气-水两相流流型的相关研究。本章详细叙述了流型可视化研究的目的、方法和内容，给出了CaCl2溶液的基本物性参数以及可视化研究的结果，为进一步研究球床空气-水两相流流型等相关方面的研究扫清障碍。%In the research of new-concept nuclear reactor, debris bed cooling, and chemical industry, gas-liquid two-phase flow in porous media are involved. Type gas-liquid two phase flow study is the first problem of flow pattern observation, only solved the problem, the subsequent flow pattern classification, the flow pattern identification, the relationship between the resistance to flow pattern and a series of problems, such as can be. Therefore, this article research content by the visualization study began, through visualization research results to guide the pebble bed type air-water two phase flow of related research. Is described in detail in this chapter flow pattern visualization study purpose, method and content, the basic physical parameters of CaCl2 solution is given and visual results, for the further study on the air bed - water two phase flow and other related research.
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