Simulation comparison and test verification of ventilation methods in large-scale welding workshops

Taking a large-scale welding workshop as an example, analyses the diffusion mechanism of welding fume in large-scale space by numerical simulation, and finds the existence of fume retention area above the workshop. Proposes three ventilation methods. Through comparation and analysis, concludes that the optimized ventilation mode is displacement air inlet plus induced jet fan and mechanical exhaust fan. The results of field measurement show that the ventilation method can meet the engineering needs and the code specifications.