Review article

A ventilation system for a welding shop using a new air distributor with rotating grilles is proposed and investigated. As a result of numerical modeling in the FLUENT program, there was obtained the spatial distribution of concentration of suspended particles for different flow directions of the supply air. There was carried out an assessment of the efficiency of removing the welding aerosol with particles ranging in size from 1 to 50 microns from the premise working area at different air supply speeds. The implemented research shows that the increasing of the air flow rate helps reducing the concentration of particulate matter in the working area. There has been specified a rational value for the air supply speed of 10 m/s, which corresponds to the technological requirements for welding works. The influence of particles` porosity on their concentration in the working area was studied.