Abstract
The operating condition of the distillation column is strongly restricted by the flooding condition. Thus, several investigations of the flooding phenomena have been widely conducted so far, but most of those investigations were based on the experimental results in round tube with water-air two-phase flow. In this investigation, the flooding velocity was measured in an actual structured packing with air-water / air-HCFC(R-225) two-phase flow. In the experiment, the distribution of the liquid hold up was also evaluated by using X-ray radiography. Experimental results were evaluated by Wallis's equation, and the influence of the liquid surface tension clearly appeared as the fluid distribution and the flooding velocity.
