The Features Of The Film Flow Of Liquid Nitrogen Over The Corrugated Plates With Combined Microtexture

Abstract

Experimental results on hydrodynamics of cryogenic liquid film flow over the surface of the single elements of the structured packing are presented. Based on the comparison of experimental data, the effect of microtexture form, diameter of the holes on the zones of liquid film spreading over a corrugated surface is shown for different values of the film Reynolds number. It is shown that the presence of combined microtexture (with the periodic change in its direction at the height of the sheet) leads to a better spreading of the liquid nitrogen film on the surface of the corrugated perforated sheet. Analysis of experimental data shows that the presence of the periodic zones with vertical orientation of the microchannels on the sheets with the combined microtexture provides the greater flow of liquid through the holes compared to the sheet having the horizontal direction of microtexture. The use of smaller holes, while maintaining the same total area occupied by holes, at the small degree of irrigation also leads to increasing size of the wetting zones on the sheet with combined microtexture.