Influence of the dimensions of the grid cell and the distance from it to the nozzle of the foam-generating device on the foam dispersion
Keywords:foam, bubble diameter, bubble blowing speed, dispersion
Purpose. To experimentally evaluate the influence of the size of the grid cell and the distance from the nozzle to it on the dispersion of the resulting air-mechanical foam. Based on the obtained experimental data, check the adequacy of theoretical calculations of the diameter of the bubble formed on the flooded and non-flooded holes.
Methods. In the course of the work the main theoretical and empirical research methods were used. To determine the diameter of foam bubbles the multifunctional graphic editor GIMP was used.
Findings. Empirical data on the diameter of foam bubbles were obtained for the following ranges of variable parameters: grid cell size from 0.5 × 0.5 to 3.2 × 3.2 mm; foaming solution jet velocity at the nozzle outlet from 7 to 17 m/s and the distance from the nozzle outlet to the grid from 50 to 400 mm. It was established that at a distance of 200 mm from the nozzle outlet to the grid the average diameter of the foam bubbles was closest to the theoretically calculated values (deviation no more than 26 %, average deviation 14 %).
Application field of research. Development of devices for generating air-mechanical foam on the grids.
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